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Re: limited slip differential
j.lef wrote: >>Yeah, it's a good thing. It shifts some power to the tire with more > > traction > >>when the rear tires have unequal traction. Otherwise, with an open >>differential, if you say had one rear tire on an ice patch, and one on dry >>pavement, an open differential will literally send all the power to the > > wheel > >>with NO traction and you'll sit there spinning... >> >>However the Jeep Traklock is nothing to get too excited about. It's >>clutch-based and will wear out. But it'll last 60 or 80K miles and > > that's > >>probably about when most people who buy new cars sell 'em anyway (wouldn't > > know > >><g>)... >> >>-jeff > > > But if your are driving in full time 4wd, > would that situation occur to begin with? Sorry for not completely > understanding. I understand what the effect of lsd does on a rear or front > wheel drive, but how does it effect a jeep using part time or full time four > wheel drive? > > Much > regards Jerry It affects it less, Jerry, but you have to agree that the more tires you have with traction, the better. -- __________________________________________________ _________ tw 03 TJ Rubicon - Rubicon Express 4.5" 01 XJ Sport There is a very fine line between "hobby" and "mental illness." -- Dave Barry Pronunciation: 'jEp Function: noun Date: 1940 Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase') A small general-purpose motor vehicle with 80-inch wheelbase, 1/4-ton capacity, and four-wheel drive used by the U.S. army in World War II. (Please remove the OBVIOUS to reply by email) __________________________________________________ _________ |
Re: limited slip differential
j.lef wrote: >>Yeah, it's a good thing. It shifts some power to the tire with more > > traction > >>when the rear tires have unequal traction. Otherwise, with an open >>differential, if you say had one rear tire on an ice patch, and one on dry >>pavement, an open differential will literally send all the power to the > > wheel > >>with NO traction and you'll sit there spinning... >> >>However the Jeep Traklock is nothing to get too excited about. It's >>clutch-based and will wear out. But it'll last 60 or 80K miles and > > that's > >>probably about when most people who buy new cars sell 'em anyway (wouldn't > > know > >><g>)... >> >>-jeff > > > But if your are driving in full time 4wd, > would that situation occur to begin with? Sorry for not completely > understanding. I understand what the effect of lsd does on a rear or front > wheel drive, but how does it effect a jeep using part time or full time four > wheel drive? > > Much > regards Jerry It affects it less, Jerry, but you have to agree that the more tires you have with traction, the better. -- __________________________________________________ _________ tw 03 TJ Rubicon - Rubicon Express 4.5" 01 XJ Sport There is a very fine line between "hobby" and "mental illness." -- Dave Barry Pronunciation: 'jEp Function: noun Date: 1940 Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase') A small general-purpose motor vehicle with 80-inch wheelbase, 1/4-ton capacity, and four-wheel drive used by the U.S. army in World War II. (Please remove the OBVIOUS to reply by email) __________________________________________________ _________ |
Re: limited slip differential
j.lef wrote: >>Yeah, it's a good thing. It shifts some power to the tire with more > > traction > >>when the rear tires have unequal traction. Otherwise, with an open >>differential, if you say had one rear tire on an ice patch, and one on dry >>pavement, an open differential will literally send all the power to the > > wheel > >>with NO traction and you'll sit there spinning... >> >>However the Jeep Traklock is nothing to get too excited about. It's >>clutch-based and will wear out. But it'll last 60 or 80K miles and > > that's > >>probably about when most people who buy new cars sell 'em anyway (wouldn't > > know > >><g>)... >> >>-jeff > > > But if your are driving in full time 4wd, > would that situation occur to begin with? Sorry for not completely > understanding. I understand what the effect of lsd does on a rear or front > wheel drive, but how does it effect a jeep using part time or full time four > wheel drive? > > Much > regards Jerry It affects it less, Jerry, but you have to agree that the more tires you have with traction, the better. -- __________________________________________________ _________ tw 03 TJ Rubicon - Rubicon Express 4.5" 01 XJ Sport There is a very fine line between "hobby" and "mental illness." -- Dave Barry Pronunciation: 'jEp Function: noun Date: 1940 Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase') A small general-purpose motor vehicle with 80-inch wheelbase, 1/4-ton capacity, and four-wheel drive used by the U.S. army in World War II. (Please remove the OBVIOUS to reply by email) __________________________________________________ _________ |
Re: limited slip differential
One thing a limited slip differential does 'not' do is shift power to one
side or the other. All it does is couple the spinning side to the non-spinning side a little via its clutch pack so the resistance of the tire with better traction allows more torque to be sent to both tires. Both tires always, always, ALWAYS see exactly 50% of the torque sent to the rear axle by the engine. It's just that when one tire starts spinning on an open differential, the engine only sees the resistance of the spinning tire so it develops very little torque and thus very little torque gets provided to the tire that still has good traction. The more resistance the engine sees, the more torque it develops... so when the LSD couples the spinning tire to the tire that is not spinning, it sees more resistance and thus develops more torque... which gives the tire with more traction more power so it gets you going again. This is why stepping on the brakes a little when you're stuck, or pulling the parking brake on a little if it's a rear tire that is spinning, will often get you moving again since it provides more resistance for the engine to work into which raises the amount of torque being sent to both tires. So when one tire is spinning, it's not that the differential is sending "all" of the power to the spinning tire... it's really sending a 50:50 split to both sides... but with one tire spinning, the engine sees so little resistance that very little torque is developed and when that very little torque is split 50:50 to both sides, the side with traction isn't getting enough torque to move the vehicle... thus you're stuck. The fact that both tires always see 50% of the 'available' torque, no matter if it's equipped with a locker, LSD, or just an open axle is the hardest thing for most people to understand. It's just how much torque is really available to those tires that determine if you're going to be able to move or not. :) Jerry -- -- Jerry Bransford PP-ASEL N6TAY See the Geezer Jeep at http://members.cox.net/jerrypb/ "Handywired" <handywired@aol.com> wrote in message news:20040828033849.19087.00004249@mb-m06.aol.com... > >> Pricing out on edmunds my car. What exactly does the >> limited >>slip differential option do on a jeep, and is it preferable to have it? > > Yeah, it's a good thing. It shifts some power to the tire with more > traction > when the rear tires have unequal traction. Otherwise, with an open > differential, if you say had one rear tire on an ice patch, and one on dry > pavement, an open differential will literally send all the power to the > wheel > with NO traction and you'll sit there spinning... > > However the Jeep Traklock is nothing to get too excited about. It's > clutch-based and will wear out. But it'll last 60 or 80K miles and > that's > probably about when most people who buy new cars sell 'em anyway (wouldn't > know > <g>)... > > -jeff |
Re: limited slip differential
One thing a limited slip differential does 'not' do is shift power to one
side or the other. All it does is couple the spinning side to the non-spinning side a little via its clutch pack so the resistance of the tire with better traction allows more torque to be sent to both tires. Both tires always, always, ALWAYS see exactly 50% of the torque sent to the rear axle by the engine. It's just that when one tire starts spinning on an open differential, the engine only sees the resistance of the spinning tire so it develops very little torque and thus very little torque gets provided to the tire that still has good traction. The more resistance the engine sees, the more torque it develops... so when the LSD couples the spinning tire to the tire that is not spinning, it sees more resistance and thus develops more torque... which gives the tire with more traction more power so it gets you going again. This is why stepping on the brakes a little when you're stuck, or pulling the parking brake on a little if it's a rear tire that is spinning, will often get you moving again since it provides more resistance for the engine to work into which raises the amount of torque being sent to both tires. So when one tire is spinning, it's not that the differential is sending "all" of the power to the spinning tire... it's really sending a 50:50 split to both sides... but with one tire spinning, the engine sees so little resistance that very little torque is developed and when that very little torque is split 50:50 to both sides, the side with traction isn't getting enough torque to move the vehicle... thus you're stuck. The fact that both tires always see 50% of the 'available' torque, no matter if it's equipped with a locker, LSD, or just an open axle is the hardest thing for most people to understand. It's just how much torque is really available to those tires that determine if you're going to be able to move or not. :) Jerry -- -- Jerry Bransford PP-ASEL N6TAY See the Geezer Jeep at http://members.cox.net/jerrypb/ "Handywired" <handywired@aol.com> wrote in message news:20040828033849.19087.00004249@mb-m06.aol.com... > >> Pricing out on edmunds my car. What exactly does the >> limited >>slip differential option do on a jeep, and is it preferable to have it? > > Yeah, it's a good thing. It shifts some power to the tire with more > traction > when the rear tires have unequal traction. Otherwise, with an open > differential, if you say had one rear tire on an ice patch, and one on dry > pavement, an open differential will literally send all the power to the > wheel > with NO traction and you'll sit there spinning... > > However the Jeep Traklock is nothing to get too excited about. It's > clutch-based and will wear out. But it'll last 60 or 80K miles and > that's > probably about when most people who buy new cars sell 'em anyway (wouldn't > know > <g>)... > > -jeff |
Re: limited slip differential
One thing a limited slip differential does 'not' do is shift power to one
side or the other. All it does is couple the spinning side to the non-spinning side a little via its clutch pack so the resistance of the tire with better traction allows more torque to be sent to both tires. Both tires always, always, ALWAYS see exactly 50% of the torque sent to the rear axle by the engine. It's just that when one tire starts spinning on an open differential, the engine only sees the resistance of the spinning tire so it develops very little torque and thus very little torque gets provided to the tire that still has good traction. The more resistance the engine sees, the more torque it develops... so when the LSD couples the spinning tire to the tire that is not spinning, it sees more resistance and thus develops more torque... which gives the tire with more traction more power so it gets you going again. This is why stepping on the brakes a little when you're stuck, or pulling the parking brake on a little if it's a rear tire that is spinning, will often get you moving again since it provides more resistance for the engine to work into which raises the amount of torque being sent to both tires. So when one tire is spinning, it's not that the differential is sending "all" of the power to the spinning tire... it's really sending a 50:50 split to both sides... but with one tire spinning, the engine sees so little resistance that very little torque is developed and when that very little torque is split 50:50 to both sides, the side with traction isn't getting enough torque to move the vehicle... thus you're stuck. The fact that both tires always see 50% of the 'available' torque, no matter if it's equipped with a locker, LSD, or just an open axle is the hardest thing for most people to understand. It's just how much torque is really available to those tires that determine if you're going to be able to move or not. :) Jerry -- -- Jerry Bransford PP-ASEL N6TAY See the Geezer Jeep at http://members.cox.net/jerrypb/ "Handywired" <handywired@aol.com> wrote in message news:20040828033849.19087.00004249@mb-m06.aol.com... > >> Pricing out on edmunds my car. What exactly does the >> limited >>slip differential option do on a jeep, and is it preferable to have it? > > Yeah, it's a good thing. It shifts some power to the tire with more > traction > when the rear tires have unequal traction. Otherwise, with an open > differential, if you say had one rear tire on an ice patch, and one on dry > pavement, an open differential will literally send all the power to the > wheel > with NO traction and you'll sit there spinning... > > However the Jeep Traklock is nothing to get too excited about. It's > clutch-based and will wear out. But it'll last 60 or 80K miles and > that's > probably about when most people who buy new cars sell 'em anyway (wouldn't > know > <g>)... > > -jeff |
Re: limited slip differential
Why doesn't the ABS see the spinning tire and try to slow it down by
applying that tire's brake? "Jerry Bransford" <jerrypb@cox.net> wrote in message news:yQ2Yc.159033$sh.115904@fed1read06... > One thing a limited slip differential does 'not' do is shift power to one > side or the other. All it does is couple the spinning side to the > non-spinning side a little via its clutch pack so the resistance of the tire > with better traction allows more torque to be sent to both tires. Both > tires always, always, ALWAYS see exactly 50% of the torque sent to the rear > axle by the engine. It's just that when one tire starts spinning on an open > differential, the engine only sees the resistance of the spinning tire so it > develops very little torque and thus very little torque gets provided to the > tire that still has good traction. The more resistance the engine sees, the > more torque it develops... so when the LSD couples the spinning tire to the > tire that is not spinning, it sees more resistance and thus develops more > torque... which gives the tire with more traction more power so it gets you > going again. This is why stepping on the brakes a little when you're stuck, > or pulling the parking brake on a little if it's a rear tire that is > spinning, will often get you moving again since it provides more resistance > for the engine to work into which raises the amount of torque being sent to > both tires. > > So when one tire is spinning, it's not that the differential is sending > "all" of the power to the spinning tire... it's really sending a 50:50 split > to both sides... but with one tire spinning, the engine sees so little > resistance that very little torque is developed and when that very little > torque is split 50:50 to both sides, the side with traction isn't getting > enough torque to move the vehicle... thus you're stuck. > > The fact that both tires always see 50% of the 'available' torque, no matter > if it's equipped with a locker, LSD, or just an open axle is the hardest > thing for most people to understand. It's just how much torque is really > available to those tires that determine if you're going to be able to move > or not. :) > > Jerry > -- > -- > Jerry Bransford > PP-ASEL N6TAY > See the Geezer Jeep at > http://members.cox.net/jerrypb/ > "Handywired" <handywired@aol.com> wrote in message > news:20040828033849.19087.00004249@mb-m06.aol.com... > > > >> Pricing out on edmunds my car. What exactly does the > >> limited > >>slip differential option do on a jeep, and is it preferable to have it? > > > > Yeah, it's a good thing. It shifts some power to the tire with more > > traction > > when the rear tires have unequal traction. Otherwise, with an open > > differential, if you say had one rear tire on an ice patch, and one on dry > > pavement, an open differential will literally send all the power to the > > wheel > > with NO traction and you'll sit there spinning... > > > > However the Jeep Traklock is nothing to get too excited about. It's > > clutch-based and will wear out. But it'll last 60 or 80K miles and > > that's > > probably about when most people who buy new cars sell 'em anyway (wouldn't > > know > > <g>)... > > > > -jeff > > |
Re: limited slip differential
Why doesn't the ABS see the spinning tire and try to slow it down by
applying that tire's brake? "Jerry Bransford" <jerrypb@cox.net> wrote in message news:yQ2Yc.159033$sh.115904@fed1read06... > One thing a limited slip differential does 'not' do is shift power to one > side or the other. All it does is couple the spinning side to the > non-spinning side a little via its clutch pack so the resistance of the tire > with better traction allows more torque to be sent to both tires. Both > tires always, always, ALWAYS see exactly 50% of the torque sent to the rear > axle by the engine. It's just that when one tire starts spinning on an open > differential, the engine only sees the resistance of the spinning tire so it > develops very little torque and thus very little torque gets provided to the > tire that still has good traction. The more resistance the engine sees, the > more torque it develops... so when the LSD couples the spinning tire to the > tire that is not spinning, it sees more resistance and thus develops more > torque... which gives the tire with more traction more power so it gets you > going again. This is why stepping on the brakes a little when you're stuck, > or pulling the parking brake on a little if it's a rear tire that is > spinning, will often get you moving again since it provides more resistance > for the engine to work into which raises the amount of torque being sent to > both tires. > > So when one tire is spinning, it's not that the differential is sending > "all" of the power to the spinning tire... it's really sending a 50:50 split > to both sides... but with one tire spinning, the engine sees so little > resistance that very little torque is developed and when that very little > torque is split 50:50 to both sides, the side with traction isn't getting > enough torque to move the vehicle... thus you're stuck. > > The fact that both tires always see 50% of the 'available' torque, no matter > if it's equipped with a locker, LSD, or just an open axle is the hardest > thing for most people to understand. It's just how much torque is really > available to those tires that determine if you're going to be able to move > or not. :) > > Jerry > -- > -- > Jerry Bransford > PP-ASEL N6TAY > See the Geezer Jeep at > http://members.cox.net/jerrypb/ > "Handywired" <handywired@aol.com> wrote in message > news:20040828033849.19087.00004249@mb-m06.aol.com... > > > >> Pricing out on edmunds my car. What exactly does the > >> limited > >>slip differential option do on a jeep, and is it preferable to have it? > > > > Yeah, it's a good thing. It shifts some power to the tire with more > > traction > > when the rear tires have unequal traction. Otherwise, with an open > > differential, if you say had one rear tire on an ice patch, and one on dry > > pavement, an open differential will literally send all the power to the > > wheel > > with NO traction and you'll sit there spinning... > > > > However the Jeep Traklock is nothing to get too excited about. It's > > clutch-based and will wear out. But it'll last 60 or 80K miles and > > that's > > probably about when most people who buy new cars sell 'em anyway (wouldn't > > know > > <g>)... > > > > -jeff > > |
Re: limited slip differential
Why doesn't the ABS see the spinning tire and try to slow it down by
applying that tire's brake? "Jerry Bransford" <jerrypb@cox.net> wrote in message news:yQ2Yc.159033$sh.115904@fed1read06... > One thing a limited slip differential does 'not' do is shift power to one > side or the other. All it does is couple the spinning side to the > non-spinning side a little via its clutch pack so the resistance of the tire > with better traction allows more torque to be sent to both tires. Both > tires always, always, ALWAYS see exactly 50% of the torque sent to the rear > axle by the engine. It's just that when one tire starts spinning on an open > differential, the engine only sees the resistance of the spinning tire so it > develops very little torque and thus very little torque gets provided to the > tire that still has good traction. The more resistance the engine sees, the > more torque it develops... so when the LSD couples the spinning tire to the > tire that is not spinning, it sees more resistance and thus develops more > torque... which gives the tire with more traction more power so it gets you > going again. This is why stepping on the brakes a little when you're stuck, > or pulling the parking brake on a little if it's a rear tire that is > spinning, will often get you moving again since it provides more resistance > for the engine to work into which raises the amount of torque being sent to > both tires. > > So when one tire is spinning, it's not that the differential is sending > "all" of the power to the spinning tire... it's really sending a 50:50 split > to both sides... but with one tire spinning, the engine sees so little > resistance that very little torque is developed and when that very little > torque is split 50:50 to both sides, the side with traction isn't getting > enough torque to move the vehicle... thus you're stuck. > > The fact that both tires always see 50% of the 'available' torque, no matter > if it's equipped with a locker, LSD, or just an open axle is the hardest > thing for most people to understand. It's just how much torque is really > available to those tires that determine if you're going to be able to move > or not. :) > > Jerry > -- > -- > Jerry Bransford > PP-ASEL N6TAY > See the Geezer Jeep at > http://members.cox.net/jerrypb/ > "Handywired" <handywired@aol.com> wrote in message > news:20040828033849.19087.00004249@mb-m06.aol.com... > > > >> Pricing out on edmunds my car. What exactly does the > >> limited > >>slip differential option do on a jeep, and is it preferable to have it? > > > > Yeah, it's a good thing. It shifts some power to the tire with more > > traction > > when the rear tires have unequal traction. Otherwise, with an open > > differential, if you say had one rear tire on an ice patch, and one on dry > > pavement, an open differential will literally send all the power to the > > wheel > > with NO traction and you'll sit there spinning... > > > > However the Jeep Traklock is nothing to get too excited about. It's > > clutch-based and will wear out. But it'll last 60 or 80K miles and > > that's > > probably about when most people who buy new cars sell 'em anyway (wouldn't > > know > > <g>)... > > > > -jeff > > |
Re: limited slip differential
"Stephen R. Conrad" <sconrad@telecommunity.to> wrote in message news:2ronnfF1cpl9sU1@uni-berlin.de... > Why doesn't the ABS see the spinning tire and try to slow it down by > applying that tire's brake? That would be "traction control". JoBo > "Jerry Bransford" <jerrypb@cox.net> wrote in message > news:yQ2Yc.159033$sh.115904@fed1read06... > > One thing a limited slip differential does 'not' do is shift power to one > > side or the other. All it does is couple the spinning side to the > > non-spinning side a little via its clutch pack so the resistance of the > tire > > with better traction allows more torque to be sent to both tires. Both > > tires always, always, ALWAYS see exactly 50% of the torque sent to the > rear > > axle by the engine. It's just that when one tire starts spinning on an > open > > differential, the engine only sees the resistance of the spinning tire so > it > > develops very little torque and thus very little torque gets provided to > the > > tire that still has good traction. The more resistance the engine sees, > the > > more torque it develops... so when the LSD couples the spinning tire to > the > > tire that is not spinning, it sees more resistance and thus develops more > > torque... which gives the tire with more traction more power so it gets > you > > going again. This is why stepping on the brakes a little when you're > stuck, > > or pulling the parking brake on a little if it's a rear tire that is > > spinning, will often get you moving again since it provides more > resistance > > for the engine to work into which raises the amount of torque being sent > to > > both tires. > > > > So when one tire is spinning, it's not that the differential is sending > > "all" of the power to the spinning tire... it's really sending a 50:50 > split > > to both sides... but with one tire spinning, the engine sees so little > > resistance that very little torque is developed and when that very little > > torque is split 50:50 to both sides, the side with traction isn't getting > > enough torque to move the vehicle... thus you're stuck. > > > > The fact that both tires always see 50% of the 'available' torque, no > matter > > if it's equipped with a locker, LSD, or just an open axle is the hardest > > thing for most people to understand. It's just how much torque is really > > available to those tires that determine if you're going to be able to move > > or not. :) > > > > Jerry > > -- > > -- > > Jerry Bransford > > PP-ASEL N6TAY > > See the Geezer Jeep at > > http://members.cox.net/jerrypb/ > > "Handywired" <handywired@aol.com> wrote in message > > news:20040828033849.19087.00004249@mb-m06.aol.com... > > > > > >> Pricing out on edmunds my car. What exactly does the > > >> limited > > >>slip differential option do on a jeep, and is it preferable to have it? > > > > > > Yeah, it's a good thing. It shifts some power to the tire with more > > > traction > > > when the rear tires have unequal traction. Otherwise, with an open > > > differential, if you say had one rear tire on an ice patch, and one on > dry > > > pavement, an open differential will literally send all the power to the > > > wheel > > > with NO traction and you'll sit there spinning... > > > > > > However the Jeep Traklock is nothing to get too excited about. It's > > > clutch-based and will wear out. But it'll last 60 or 80K miles and > > > that's > > > probably about when most people who buy new cars sell 'em anyway > (wouldn't > > > know > > > <g>)... > > > > > > -jeff > > > > > > |
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