itsjust me Posted September 27, 2010 Share Posted September 27, 2010 couple of questions. 1. i have a hi pinion 30 front and 35 rear axle. they are 3.07s.(at least in the front) the rear tag is long rusted way. i have a 3.55 rear ring and pinion set already. i have noticed some wranglers are off 1(4.10 and 4.11).do the comanches require matching gear sets or are they supposed to be 1 off for the front? 2.how do you i.d. what trans is is under the stick? its a 5 speed. 2.5.can you tell by the shift knob? Quote Link to comment Share on other sites More sharing options...
ComancheKid45 Posted September 27, 2010 Share Posted September 27, 2010 .01 off is fine to match up, should not have any issues. As for the Trannys. 87-90 2.5l MJs used the AX5 (AX4 4 speeds) I'm not sure if this changed for the 91-92 model years though. O Yeah, Welcome to the MJ madness which is ComancheClub :cheers: Quote Link to comment Share on other sites More sharing options...
itsjust me Posted September 27, 2010 Author Share Posted September 27, 2010 they didn't have a renault option for mine? its a 89 4.0L Quote Link to comment Share on other sites More sharing options...
freakjeep93 Posted September 27, 2010 Share Posted September 27, 2010 for a 4.0 it could be either a ba 10/5 or a ax 15 the ax being the better trans Quote Link to comment Share on other sites More sharing options...
itsjust me Posted September 27, 2010 Author Share Posted September 27, 2010 so how do i tell them apart? Quote Link to comment Share on other sites More sharing options...
itsjust me Posted September 27, 2010 Author Share Posted September 27, 2010 no one can tell me how to i.d. what trans i have? i did a search prior to the first post. didn't see anything to help figure it out. Quote Link to comment Share on other sites More sharing options...
Geonovast Posted September 27, 2010 Share Posted September 27, 2010 Trans: viewtopic.php?f=9&t=11699 The difference in 4.10 or 4.11 is usually just people not knowing the actual gearing of their axles. For the 4.10 ish range, the Dana 30, Dana 35, Chrysler 8.25, and I believe the ford 8.8 all have 41 on the ring, 10 on the pinion. This gives you exactly 4.10:1 gearing, no rounding. The Dana 44 has 45 on the ring and 11 on the pinion, giving you 4.090909090909090.... rounded to 4.09. AFAIK, no common Jeep axle has a 4.11 ratio. If you're dealing with Dana 30 and Dana 35, all the ratios exactly match between the two. Quote Link to comment Share on other sites More sharing options...
case5412 Posted September 27, 2010 Share Posted September 27, 2010 You can easily gain the stock specifications of your truck by emailing Chrysler the last 8 numbers of your VIN and asking for a "spec sheet". If that helps at all. ;) Quote Link to comment Share on other sites More sharing options...
MjPioneer Posted September 27, 2010 Share Posted September 27, 2010 If you have an 89 4.0 it's likely to be the Ba/105 http://www.novak-adapt.com/knowledge/ba10_5.htm Quote Link to comment Share on other sites More sharing options...
Eagle Posted September 28, 2010 Share Posted September 28, 2010 If you have an 89 4.0 it's likely to be the Ba/105http://www.novak-adapt.com/knowledge/ba10_5.htm No, 1989 was the year they made a mid-year change from the BA 10/5 to the AX-15. It could be either. The only way to know is to crawl under and look. The BA 10/5 case is split vertically along the length. The AX-15 is split transversely into a front half and a rear half, with a spacer between the front and rear sections. Quote Link to comment Share on other sites More sharing options...
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