Speedometer gear replacement on a Jeep TJ

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Speedometer gear replacement on a Jeep TJ

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Speedometer gear replacement on a Jeep TJ

Published by jeepster357
05-25-2008

Speedometer gear replacement on a Jeep TJ

First off make sure you have the correct gear. When I ordered my gear I called Quadratec, the service rep told me I needed a 32 tooth gear but their website said 31. The rep had to check with a couple folks and some charts before the correct gear was verified. FYI, the gear needed for 33" tires and 3.73 gears on a '01 wrangler is a 31 tooth gear.

Changing the speedometer gear for your Jeep TJ is quite simple and requires no special tools. Before you start make sure you have a ratchet with a 1/2 socket, a clean rag and small drain pan or any other fluid catching tub.

#1 (permalink)

By TerryMason on 05-29-2008, 02:28 PM

How to replace a Jeep speedometer gear

Step 1. Locate the speedo sensor on your transfer case and unplug

Step 2. Use the 1/2 socket and remove bolt and lock ring for sensor housing.

Step 3. Remove housing assembly, carefully rocking back and forth so you dont tear the o-ring.

Step 4. Pull gear from housing and replace with new gear.

Step 5. Stick finger into housing hole and use oil to lubricate o-ring.

Step 6. Install housing back into t-case, be careful not to damage o-ring.

Step 7. You will need to rotate housing counter clockwise from original posistion, housing uses a centrific ring and your new gear will be smaller then OEM.

Step 8. Plug in harness and test drive. I had to do this step 2 times since I wasnt aware of the centrific ring. If speedometer does not work you will need to adjust your gear housing. I have not found a sure fire way of getting this the first time so have patience. Once again, do this carefully. Nothing worse then running around town for 1 o-ring.

Hopefully this will help some of you guys out.

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Last edited by TerryMason; 05-29-2008 at 02:46 PM..

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