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Lift & Driveline problems
I have an 03 TJ Rubicon, and will put in a 2" Old Man Emu suspension
lift and also run 1.5" engine lift (and body) to fit a high clearance skidplate. What driveline problems should I expect, what do I need to buy in advance to fix the problems, how do I fix it, and will I need to have custom driveshafts made? Thanks for your time and help, Andrew Whitley |
Re: Lift & Driveline problems
Your driveshaft length will be fine with that height lift. With a 2"
suspension lift, it's common that the transfer case may have to be dropped a little to eliminate vibrations... but that you're installing a 1.5" engine lift will eliminate that need. Lifting the engine at the front works the same as dropping the t-case a little to reduce the angles that can cause drivetrain vibrations. You should be perfectly fine with that combination. Jerry -- Jerry Bransford To email, remove 'me' from my email address KC6TAY, PP-ASEL See the Geezer Jeep at http://members.cox.net/jerrypb/ "Andrew" <andrewmuaddib@hotmail.com> wrote in message news:8b5c891c.0312300912.1638c86c@posting.google.c om... > I have an 03 TJ Rubicon, and will put in a 2" Old Man Emu suspension > lift and also run 1.5" engine lift (and body) to fit a high clearance > skidplate. What driveline problems should I expect, what do I need to > buy in advance to fix the problems, how do I fix it, and will I need > to have custom driveshafts made? > > Thanks for your time and help, > > Andrew Whitley |
Re: Lift & Driveline problems
Your driveshaft length will be fine with that height lift. With a 2"
suspension lift, it's common that the transfer case may have to be dropped a little to eliminate vibrations... but that you're installing a 1.5" engine lift will eliminate that need. Lifting the engine at the front works the same as dropping the t-case a little to reduce the angles that can cause drivetrain vibrations. You should be perfectly fine with that combination. Jerry -- Jerry Bransford To email, remove 'me' from my email address KC6TAY, PP-ASEL See the Geezer Jeep at http://members.cox.net/jerrypb/ "Andrew" <andrewmuaddib@hotmail.com> wrote in message news:8b5c891c.0312300912.1638c86c@posting.google.c om... > I have an 03 TJ Rubicon, and will put in a 2" Old Man Emu suspension > lift and also run 1.5" engine lift (and body) to fit a high clearance > skidplate. What driveline problems should I expect, what do I need to > buy in advance to fix the problems, how do I fix it, and will I need > to have custom driveshafts made? > > Thanks for your time and help, > > Andrew Whitley |
Re: Lift & Driveline problems
Your driveshaft length will be fine with that height lift. With a 2"
suspension lift, it's common that the transfer case may have to be dropped a little to eliminate vibrations... but that you're installing a 1.5" engine lift will eliminate that need. Lifting the engine at the front works the same as dropping the t-case a little to reduce the angles that can cause drivetrain vibrations. You should be perfectly fine with that combination. Jerry -- Jerry Bransford To email, remove 'me' from my email address KC6TAY, PP-ASEL See the Geezer Jeep at http://members.cox.net/jerrypb/ "Andrew" <andrewmuaddib@hotmail.com> wrote in message news:8b5c891c.0312300912.1638c86c@posting.google.c om... > I have an 03 TJ Rubicon, and will put in a 2" Old Man Emu suspension > lift and also run 1.5" engine lift (and body) to fit a high clearance > skidplate. What driveline problems should I expect, what do I need to > buy in advance to fix the problems, how do I fix it, and will I need > to have custom driveshafts made? > > Thanks for your time and help, > > Andrew Whitley |
Re: Lift & Driveline problems
I don't have a Rubicon but there are two possible issues. The NP242 on
the Rubicon has a fixed yoke rear output already so the 'usual' slip-yoke induced vibration problems on the NP241 wouldn't become an issue. The first 'maybe' is driveshaft length. With the t-case and suspesion lifts you might over-extend it if you fully articulate the rear. I'm sure it would be fine on the road, but under full articulation on the trail it could have insufficient contact in the slip joint which might damage it under high torque (or even cause it to fall out!) Second, it is possible that the increased angle of the u-joints with the lift could be too large for them to operate correctly. They could break if the angle is too large (again- under full articulation.) You might need a double-cardan CV shaft or a special high-angle shaft. Do your lifts and jack up the back. See how things look and decide from there. But don't take it off-road until you check it out or someone with more knowledge then I gives you a better answer! Andrew wrote: > I have an 03 TJ Rubicon, and will put in a 2" Old Man Emu suspension > lift and also run 1.5" engine lift (and body) to fit a high clearance > skidplate. What driveline problems should I expect, what do I need to > buy in advance to fix the problems, how do I fix it, and will I need > to have custom driveshafts made? > > Thanks for your time and help, > > Andrew Whitley |
Re: Lift & Driveline problems
I don't have a Rubicon but there are two possible issues. The NP242 on
the Rubicon has a fixed yoke rear output already so the 'usual' slip-yoke induced vibration problems on the NP241 wouldn't become an issue. The first 'maybe' is driveshaft length. With the t-case and suspesion lifts you might over-extend it if you fully articulate the rear. I'm sure it would be fine on the road, but under full articulation on the trail it could have insufficient contact in the slip joint which might damage it under high torque (or even cause it to fall out!) Second, it is possible that the increased angle of the u-joints with the lift could be too large for them to operate correctly. They could break if the angle is too large (again- under full articulation.) You might need a double-cardan CV shaft or a special high-angle shaft. Do your lifts and jack up the back. See how things look and decide from there. But don't take it off-road until you check it out or someone with more knowledge then I gives you a better answer! Andrew wrote: > I have an 03 TJ Rubicon, and will put in a 2" Old Man Emu suspension > lift and also run 1.5" engine lift (and body) to fit a high clearance > skidplate. What driveline problems should I expect, what do I need to > buy in advance to fix the problems, how do I fix it, and will I need > to have custom driveshafts made? > > Thanks for your time and help, > > Andrew Whitley |
Re: Lift & Driveline problems
I don't have a Rubicon but there are two possible issues. The NP242 on
the Rubicon has a fixed yoke rear output already so the 'usual' slip-yoke induced vibration problems on the NP241 wouldn't become an issue. The first 'maybe' is driveshaft length. With the t-case and suspesion lifts you might over-extend it if you fully articulate the rear. I'm sure it would be fine on the road, but under full articulation on the trail it could have insufficient contact in the slip joint which might damage it under high torque (or even cause it to fall out!) Second, it is possible that the increased angle of the u-joints with the lift could be too large for them to operate correctly. They could break if the angle is too large (again- under full articulation.) You might need a double-cardan CV shaft or a special high-angle shaft. Do your lifts and jack up the back. See how things look and decide from there. But don't take it off-road until you check it out or someone with more knowledge then I gives you a better answer! Andrew wrote: > I have an 03 TJ Rubicon, and will put in a 2" Old Man Emu suspension > lift and also run 1.5" engine lift (and body) to fit a high clearance > skidplate. What driveline problems should I expect, what do I need to > buy in advance to fix the problems, how do I fix it, and will I need > to have custom driveshafts made? > > Thanks for your time and help, > > Andrew Whitley |
Re: Lift & Driveline problems
Always plan on having vibe problems, but celebrate if you don't. Most
people who lift TJs only 2" don't have driveline vibes, but there are those that do. Your addition of the motor mount lift will probably almost negate the affect of the new suspension lift as far as vibes go. Also, adjustable control arms are a very effective way to eliminate vibes. On the other hand, Tom Woods makes a nice driveshaft kit for the Rubis. I have one on mine and am happy with it so far. Andrew wrote: > I have an 03 TJ Rubicon, and will put in a 2" Old Man Emu suspension > lift and also run 1.5" engine lift (and body) to fit a high clearance > skidplate. What driveline problems should I expect, what do I need to > buy in advance to fix the problems, how do I fix it, and will I need > to have custom driveshafts made? > > Thanks for your time and help, > > Andrew Whitley -- __________________________________________________ _________ tw 03 TJ Rubicon 01 XJ Sport There is a very fine line between "hobby" and "mental illness." -- Dave Barry Pronunciation: 'jEp Function: noun Date: 1940 Etymology: probably from g. p. (abbreviation of general purpose) 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. http://www.7slotgrille.com/jeepers/t...ron/index.html (Please remove the OBVIOUS to reply by email) __________________________________________________ _________ |
Re: Lift & Driveline problems
Always plan on having vibe problems, but celebrate if you don't. Most
people who lift TJs only 2" don't have driveline vibes, but there are those that do. Your addition of the motor mount lift will probably almost negate the affect of the new suspension lift as far as vibes go. Also, adjustable control arms are a very effective way to eliminate vibes. On the other hand, Tom Woods makes a nice driveshaft kit for the Rubis. I have one on mine and am happy with it so far. Andrew wrote: > I have an 03 TJ Rubicon, and will put in a 2" Old Man Emu suspension > lift and also run 1.5" engine lift (and body) to fit a high clearance > skidplate. What driveline problems should I expect, what do I need to > buy in advance to fix the problems, how do I fix it, and will I need > to have custom driveshafts made? > > Thanks for your time and help, > > Andrew Whitley -- __________________________________________________ _________ tw 03 TJ Rubicon 01 XJ Sport There is a very fine line between "hobby" and "mental illness." -- Dave Barry Pronunciation: 'jEp Function: noun Date: 1940 Etymology: probably from g. p. (abbreviation of general purpose) 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. http://www.7slotgrille.com/jeepers/t...ron/index.html (Please remove the OBVIOUS to reply by email) __________________________________________________ _________ |
Re: Lift & Driveline problems
Always plan on having vibe problems, but celebrate if you don't. Most
people who lift TJs only 2" don't have driveline vibes, but there are those that do. Your addition of the motor mount lift will probably almost negate the affect of the new suspension lift as far as vibes go. Also, adjustable control arms are a very effective way to eliminate vibes. On the other hand, Tom Woods makes a nice driveshaft kit for the Rubis. I have one on mine and am happy with it so far. Andrew wrote: > I have an 03 TJ Rubicon, and will put in a 2" Old Man Emu suspension > lift and also run 1.5" engine lift (and body) to fit a high clearance > skidplate. What driveline problems should I expect, what do I need to > buy in advance to fix the problems, how do I fix it, and will I need > to have custom driveshafts made? > > Thanks for your time and help, > > Andrew Whitley -- __________________________________________________ _________ tw 03 TJ Rubicon 01 XJ Sport There is a very fine line between "hobby" and "mental illness." -- Dave Barry Pronunciation: 'jEp Function: noun Date: 1940 Etymology: probably from g. p. (abbreviation of general purpose) 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. http://www.7slotgrille.com/jeepers/t...ron/index.html (Please remove the OBVIOUS to reply by email) __________________________________________________ _________ |
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