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Old 01-27-2013, 03:35 PM   #1
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'87 Wrangler YJ

Ive had this Jeep for about 2 years now. I have done nothing to it since I bought it. The trouble I'm having is that it had 35" tires on it and the 2.5 4 cyl motor is not big enough as is for the tires. Supposedly the gear ratio had been changed (to what I thought was 4.88) but it has model 231 amc with 272 ratio transmission. I have been having troubles with second. Hard to shift into and once you get into it will not stay in second. Thought it was synchronizer but now that I am reading more post sounds like Its just been wore down from the small transmission trying to work too hard to turn these tires over. That being said Im not really sure where to start? Any suggestions would be greatly appreciated.

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Old 01-27-2013, 04:11 PM   #2
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Get the Jeep on tires that it can push, UNLESS you want to spend $1000 for a regear. 4.88's is probably a minimum for a 2.5 and 35's, in my opinion.

Once you regear or change tire size, pull the transmission and have it rebuilt if it is indeed worn out from rolling those beasts down the road. It doesn't hurt or cost anything to swing by a few transmission shops to see what they say if you have any doubts about the transmission needing a rebuild.

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Old 01-27-2013, 04:28 PM   #3
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That was my thought exactly. Just wasnt sure what would be better to spend the 1000 on new tires or on rebuilding/gearing the transmission.... Think Ill do like you said and just see what the experts say
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