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Old May 14, 2007 | 09:43 PM
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Speedo Gears

Howdy. I resently got a good deal on swaping out my 3.54 geared axles with 4.10's Of course now my speedo is off. I looked at the gear in the trans case. It is a 16 tooth. "Wine" colored I believe. I am running 265/75/16's as of now. I was wondering if anyone knows off hand what gear to switch to and if I will have to change the drive gear. If this helps. 65mph is 80mph on the speedo at 3000 rpm according to the GPS.

Sorry had to edit the speeds. It's 65mph at 80 and 55mph at 65
 

Last edited by michaeljoe6; May 14, 2007 at 10:06 PM.
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Old May 14, 2007 | 09:56 PM
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Check the Read First:FAQ thread at the top of the 73-9 forum for speedo calibration info.
 
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Old Jun 4, 2007 | 07:29 PM
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Thanks. That was some good info to use. With the info I had (which the GPS really helped) I ended up with a 19 tooth gear. Right now at 30 it's right on and at 60 on the speedo the GPS reads about 59.5. SO I think it's close enough. I think I got a good deal off of e-bay on the gear. I got 6 of them (16 to 21) for 25 bucks.
 
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