Speedometer accuracy w/31" tires - did dealer lie?
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Re: Speedometer accuracy w/31" tires - did dealer lie?
My '02 TJ speedo with 31's is almost dead-on accurate according to my GPS.
It came with 30" tires from the factory and with those the speedo read a few
MPH fast.
Tom
"Jason Killian" <jkillian@coas.oregonstate.edu> wrote in message
news:Pine.SOL.4.56.0310231031290.7295@cole...
> Yeah, I get the same offset - 31's run about 4mph faster than the speedo
> on my TJ
It came with 30" tires from the factory and with those the speedo read a few
MPH fast.
Tom
"Jason Killian" <jkillian@coas.oregonstate.edu> wrote in message
news:Pine.SOL.4.56.0310231031290.7295@cole...
> Yeah, I get the same offset - 31's run about 4mph faster than the speedo
> on my TJ
Guest
Posts: n/a
Re: Speedometer accuracy w/31" tires - did dealer lie?
In article <pan.2003.10.23.10.29.52.293468@ix.netcom.com>,
Patrick Mills <plm1954R_E_M_O_V_E@ix.netcom.com> wrote:
>Hello,
>
>Got a new '04 Wrangler X in September. I plan to use this jeep for "fun"
>driving on-road in warm weather, occasional snow driving (on-road) and
>mild off-roading (no serious mudding, rocks or hill-climbing). It is not
>a daily driver.
Same reason I got my used 1994 YJ with 191K now on the clock.
>The vehicle is a stock Wrangler X with I6 engine and 3.73 gears. The only
>mod is a set of 31" AT tires (Dayton Timberlines, not BFG) and black
>wheels with faux beadlock-looking attachments - obviously for appearance
>only.
>
>I plan to gradually outfit this jeep with more trail-friendly gear,
>although I don't plan to lift it or use larger tires.
>
>My only question at this time is about speedometer accuracy. When I took
>delivery, they made me wait for about 45 minutes while the salesguy said
>they were making an adjustment so the speedometer would read accurately
>with the (dealer-installed) 31" tires.
>
>I happen to have a GPS, and, according to it, the speedometer reads slow
>by between 4 to 6 mph.
>
>Is a GPS a good way of measuring speedometer accuracy? I'm not sure if
>the dealer just gave me a run-around, did something wrong, or if my GPS is
>just not an accurate device for measuring actual vehicle speed (I use it
>for geocaching, and it's been very accurate for that).
>
>Thanks for any advice or comments. I enjoy reading this group.
>
>PLM
Generally there is an adjustment to the speedo (gear) to make it read
correctly. This is what I read.
Which GPS are you using? Is it accurate for mobile work? I guess you
are having no problems with geocaching or are you off on where the
cache is too?
--
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Patrick Mills <plm1954R_E_M_O_V_E@ix.netcom.com> wrote:
>Hello,
>
>Got a new '04 Wrangler X in September. I plan to use this jeep for "fun"
>driving on-road in warm weather, occasional snow driving (on-road) and
>mild off-roading (no serious mudding, rocks or hill-climbing). It is not
>a daily driver.
Same reason I got my used 1994 YJ with 191K now on the clock.
>The vehicle is a stock Wrangler X with I6 engine and 3.73 gears. The only
>mod is a set of 31" AT tires (Dayton Timberlines, not BFG) and black
>wheels with faux beadlock-looking attachments - obviously for appearance
>only.
>
>I plan to gradually outfit this jeep with more trail-friendly gear,
>although I don't plan to lift it or use larger tires.
>
>My only question at this time is about speedometer accuracy. When I took
>delivery, they made me wait for about 45 minutes while the salesguy said
>they were making an adjustment so the speedometer would read accurately
>with the (dealer-installed) 31" tires.
>
>I happen to have a GPS, and, according to it, the speedometer reads slow
>by between 4 to 6 mph.
>
>Is a GPS a good way of measuring speedometer accuracy? I'm not sure if
>the dealer just gave me a run-around, did something wrong, or if my GPS is
>just not an accurate device for measuring actual vehicle speed (I use it
>for geocaching, and it's been very accurate for that).
>
>Thanks for any advice or comments. I enjoy reading this group.
>
>PLM
Generally there is an adjustment to the speedo (gear) to make it read
correctly. This is what I read.
Which GPS are you using? Is it accurate for mobile work? I guess you
are having no problems with geocaching or are you off on where the
cache is too?
--
<html><form><input type crash></form></html>
nospam@zero.com Replace nospam with jetta to reply via e-mail
Guest
Posts: n/a
Re: Speedometer accuracy w/31" tires - did dealer lie?
In article <pan.2003.10.23.10.29.52.293468@ix.netcom.com>,
Patrick Mills <plm1954R_E_M_O_V_E@ix.netcom.com> wrote:
>Hello,
>
>Got a new '04 Wrangler X in September. I plan to use this jeep for "fun"
>driving on-road in warm weather, occasional snow driving (on-road) and
>mild off-roading (no serious mudding, rocks or hill-climbing). It is not
>a daily driver.
Same reason I got my used 1994 YJ with 191K now on the clock.
>The vehicle is a stock Wrangler X with I6 engine and 3.73 gears. The only
>mod is a set of 31" AT tires (Dayton Timberlines, not BFG) and black
>wheels with faux beadlock-looking attachments - obviously for appearance
>only.
>
>I plan to gradually outfit this jeep with more trail-friendly gear,
>although I don't plan to lift it or use larger tires.
>
>My only question at this time is about speedometer accuracy. When I took
>delivery, they made me wait for about 45 minutes while the salesguy said
>they were making an adjustment so the speedometer would read accurately
>with the (dealer-installed) 31" tires.
>
>I happen to have a GPS, and, according to it, the speedometer reads slow
>by between 4 to 6 mph.
>
>Is a GPS a good way of measuring speedometer accuracy? I'm not sure if
>the dealer just gave me a run-around, did something wrong, or if my GPS is
>just not an accurate device for measuring actual vehicle speed (I use it
>for geocaching, and it's been very accurate for that).
>
>Thanks for any advice or comments. I enjoy reading this group.
>
>PLM
Generally there is an adjustment to the speedo (gear) to make it read
correctly. This is what I read.
Which GPS are you using? Is it accurate for mobile work? I guess you
are having no problems with geocaching or are you off on where the
cache is too?
--
<html><form><input type crash></form></html>
nospam@zero.com Replace nospam with jetta to reply via e-mail
Patrick Mills <plm1954R_E_M_O_V_E@ix.netcom.com> wrote:
>Hello,
>
>Got a new '04 Wrangler X in September. I plan to use this jeep for "fun"
>driving on-road in warm weather, occasional snow driving (on-road) and
>mild off-roading (no serious mudding, rocks or hill-climbing). It is not
>a daily driver.
Same reason I got my used 1994 YJ with 191K now on the clock.
>The vehicle is a stock Wrangler X with I6 engine and 3.73 gears. The only
>mod is a set of 31" AT tires (Dayton Timberlines, not BFG) and black
>wheels with faux beadlock-looking attachments - obviously for appearance
>only.
>
>I plan to gradually outfit this jeep with more trail-friendly gear,
>although I don't plan to lift it or use larger tires.
>
>My only question at this time is about speedometer accuracy. When I took
>delivery, they made me wait for about 45 minutes while the salesguy said
>they were making an adjustment so the speedometer would read accurately
>with the (dealer-installed) 31" tires.
>
>I happen to have a GPS, and, according to it, the speedometer reads slow
>by between 4 to 6 mph.
>
>Is a GPS a good way of measuring speedometer accuracy? I'm not sure if
>the dealer just gave me a run-around, did something wrong, or if my GPS is
>just not an accurate device for measuring actual vehicle speed (I use it
>for geocaching, and it's been very accurate for that).
>
>Thanks for any advice or comments. I enjoy reading this group.
>
>PLM
Generally there is an adjustment to the speedo (gear) to make it read
correctly. This is what I read.
Which GPS are you using? Is it accurate for mobile work? I guess you
are having no problems with geocaching or are you off on where the
cache is too?
--
<html><form><input type crash></form></html>
nospam@zero.com Replace nospam with jetta to reply via e-mail
Guest
Posts: n/a
Re: Speedometer accuracy w/31" tires - did dealer lie?
In article <pan.2003.10.23.10.29.52.293468@ix.netcom.com>,
Patrick Mills <plm1954R_E_M_O_V_E@ix.netcom.com> wrote:
>Hello,
>
>Got a new '04 Wrangler X in September. I plan to use this jeep for "fun"
>driving on-road in warm weather, occasional snow driving (on-road) and
>mild off-roading (no serious mudding, rocks or hill-climbing). It is not
>a daily driver.
Same reason I got my used 1994 YJ with 191K now on the clock.
>The vehicle is a stock Wrangler X with I6 engine and 3.73 gears. The only
>mod is a set of 31" AT tires (Dayton Timberlines, not BFG) and black
>wheels with faux beadlock-looking attachments - obviously for appearance
>only.
>
>I plan to gradually outfit this jeep with more trail-friendly gear,
>although I don't plan to lift it or use larger tires.
>
>My only question at this time is about speedometer accuracy. When I took
>delivery, they made me wait for about 45 minutes while the salesguy said
>they were making an adjustment so the speedometer would read accurately
>with the (dealer-installed) 31" tires.
>
>I happen to have a GPS, and, according to it, the speedometer reads slow
>by between 4 to 6 mph.
>
>Is a GPS a good way of measuring speedometer accuracy? I'm not sure if
>the dealer just gave me a run-around, did something wrong, or if my GPS is
>just not an accurate device for measuring actual vehicle speed (I use it
>for geocaching, and it's been very accurate for that).
>
>Thanks for any advice or comments. I enjoy reading this group.
>
>PLM
Generally there is an adjustment to the speedo (gear) to make it read
correctly. This is what I read.
Which GPS are you using? Is it accurate for mobile work? I guess you
are having no problems with geocaching or are you off on where the
cache is too?
--
<html><form><input type crash></form></html>
nospam@zero.com Replace nospam with jetta to reply via e-mail
Patrick Mills <plm1954R_E_M_O_V_E@ix.netcom.com> wrote:
>Hello,
>
>Got a new '04 Wrangler X in September. I plan to use this jeep for "fun"
>driving on-road in warm weather, occasional snow driving (on-road) and
>mild off-roading (no serious mudding, rocks or hill-climbing). It is not
>a daily driver.
Same reason I got my used 1994 YJ with 191K now on the clock.
>The vehicle is a stock Wrangler X with I6 engine and 3.73 gears. The only
>mod is a set of 31" AT tires (Dayton Timberlines, not BFG) and black
>wheels with faux beadlock-looking attachments - obviously for appearance
>only.
>
>I plan to gradually outfit this jeep with more trail-friendly gear,
>although I don't plan to lift it or use larger tires.
>
>My only question at this time is about speedometer accuracy. When I took
>delivery, they made me wait for about 45 minutes while the salesguy said
>they were making an adjustment so the speedometer would read accurately
>with the (dealer-installed) 31" tires.
>
>I happen to have a GPS, and, according to it, the speedometer reads slow
>by between 4 to 6 mph.
>
>Is a GPS a good way of measuring speedometer accuracy? I'm not sure if
>the dealer just gave me a run-around, did something wrong, or if my GPS is
>just not an accurate device for measuring actual vehicle speed (I use it
>for geocaching, and it's been very accurate for that).
>
>Thanks for any advice or comments. I enjoy reading this group.
>
>PLM
Generally there is an adjustment to the speedo (gear) to make it read
correctly. This is what I read.
Which GPS are you using? Is it accurate for mobile work? I guess you
are having no problems with geocaching or are you off on where the
cache is too?
--
<html><form><input type crash></form></html>
nospam@zero.com Replace nospam with jetta to reply via e-mail
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