Stock Rear Axle Ratios? Auto vs. Manual

[lawsoncl]

Sorry about that assumption. It wasn't obvious from the posts that you had plenty of mechanical experience.

I can certainly relate to being on a budget as I opted to swap in a free AW4 auto when my AX15 died instead of rebuilding it again (pilot bearing went and torn up input shaft and input bearing). Quite a few runs to the local pull-n-save yard and lots of little misc issues.

I was guessing it was a D35 since that was standard for 1995 and the 8-1/4 was somewhat harder to find and only in non-abs setups. You might want to double check on the 30RH being hydraulic only. According to the 1995 FSM, the converter clutch on the 30RH is a solenoid operated by the power train control module.

 

[lawsoncl]

That is an intriguing thought. The TCU will talk to the 2.5L auto PCM?

As well the bellhousing pattern? Its different between the 2.5L I4 and 4.0L I6, I thought they were the same? Is it a depth thing?

Finally, Rebuilding? I've never done a Japanese Automatic, is that much different? Are the rebuild kits as available as the domestic automatics? What about the cost of the kit, japanese parts tend to be more expensive than domestic.

The AW4 TCU is pretty much stand alone. On the renix non-HO engines it's not connected at all and the TPS sensor has a seperate output that goes to the TCU. The ODB-I and ODB-II engine computers send a copy of the tps signal from the engine computer and has diagnostic lines. The AW4 itself changed in 1996/1997 adding a front speed sensor and the rear speed sensor changed type and pulses per rev.

The bellhousing bolt pattern on the 2.5l is a GM pattern and the 4.0 is an AMC pattern. I've only done manual trannies, so I can't vouch for the difficulty of rebuilding an AW4 (haven't even heard of one needing it), but rebuild kits are about $210.

 

[Jeff in VA]

I wouldn't have posted if I didn't know for sure. I pulled the tranny & t-case about a month ago. The axle tags are marked 4.56 & I counted the gear teeth. JIM.

I have one as well :wave:
Here's a good thread if you're interested lawsoncl:
http://www.naxja.org/forum/showthread.php?t=71960

Jeff

 

[rockwerks]

That is an intriguing thought. The TCU will talk to the 2.5L auto PCM?

As well the bellhousing pattern? Its different between the 2.5L I4 and 4.0L I6, I thought they were the same? Is it a depth thing?

the bolt pattern on the 2.5 and the 4.0 are way different, the 2.5 uses the small GM pattern and the 4.0 uses an AMC bolt pattern, from what I understand the TCM for the older systems will plug and play between the 4 and 6 cyl engine, (renix) another reason I like the older systems