Speedo after lift

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Mar 3, 2011 | 02:41 AM

XJ Joe 1723

Thread Starter

Junior Member

Joined: Jan 2011

Posts: 58

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Year: 1991

Model: Cherokee

Engine: 4.0 6cyl.

Speedo after lift

I have a 91 XJ, 4.0 with the auto trans, 4.5 lift and 31 10.5 15 Nexen Mud tires. What do I need to make my speedo right? Thanks.

Mar 3, 2011 | 03:00 AM

evilxj85

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Joined: Feb 2009

Posts: 440

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From: Oregon city, OR

Year: 94

Model: Cherokee

Engine: 4.0

change this to the correct one, google search.

Mar 3, 2011 | 11:07 AM

87seXJ

Junior Member

Joined: Aug 2009

Posts: 40

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Year: 2000

Model: Cherokee

Engine: 4.0

Buy a gps. lol. Going from a 225, 75r15 to a 31x10.5" mine is only off by 6mph at 70. Meaning when I show 70 mph on speedo I'm doing 76 per my Garmin gps. At 35 only off by like 2 mph. So i wouldn't worry unless you go up to a 33" tire.

Mar 4, 2011 | 09:02 AM

XJ Joe 1723

Thread Starter

Junior Member

Joined: Jan 2011

Posts: 58

Likes: 0

Year: 1991

Model: Cherokee

Engine: 4.0 6cyl.

LOL, a gps, never considered it. But what is the right VPS for the output, that may be cheaper than a gps.

Mar 4, 2011 | 10:33 AM

gorilla_skater

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Joined: Mar 2010

Posts: 39

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From: Glastonbury, CT

Model: Cherokee

Engine: 4.0

I resisted changing the speedo gear on mine because they cost about $40. I found a used 37 tooth gear on ebay for $18, so I pulled the trigger. I have a GPS and that's how I verified that with my 35's and 4.56 gears, it's correct now, but it's nice to have the speedometer and odometer correct.