newbie questions

[itsjust me]

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?

[ComancheKid45]

.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:

[itsjust me]

they didn't have a renault option for mine? its a 89 4.0L

[freakjeep93]

for a 4.0 it could be either a ba 10/5 or a ax 15 the ax being the better trans

[itsjust me]

so how do i tell them apart?

[itsjust me]

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.

[Geonovast]

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.

[case5412]

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. ;)

[MjPioneer]

If you have an 89 4.0 it's likely to be the Ba/105

http://www.novak-adapt.com/knowledge/ba10_5.htm

[Eagle]

If you have an 89 4.0 it's likely to be the Ba/105

http://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.