whats better 42re or aw4
i have access to an aw 4 and my 42 re is getting old and will adventually need replacing would it be a good buy, as far as i know its just the tranny no wiring. Is the aw4 a yota tranny?
The Aisin Warner AW4 is an almost bulletproof transmission. The 42RE is almost fragile in comparison. The first year of the ZJ actually came with the AW4 from the factory behind the 4.0.
1997 ZJ 5.2 Orvis, Baby!
1953 Willys M100 trailer Tagalong
The AW4 has a great rep but swapping to it is not that easy, esp on the 96-98s with OBDII, your older OBDI ZJ it might be easier, but you would most likely have to get the wiring and etc from an XJ of the same year as your ZJ to work. The other option is to rebuild the 42RE with better aftermarket parts, which would be just fine. They can be built very strong with some widely available aftermarket parts.
I'd get the 42RE rebuilt at a shop that builds racing transmissions or heavy duty truck transmissions. The good parts are out there. Keep in mind that the 42RE was based on a 904 style Chrysler Torqueflite which in its day was one of the best transmissions out there the rep suffered because of poor quality of some of the parts and updates (converter clutch and OD) that were not that well done.
Mine 42 has 204000 miles on it and I beat the snot put of it. Never slips or hesitates to shift. They are reliable as long as you keep a filter and fluid in them, and a reasonable temp.
3.5 re lift, double sheer front tb, 31" wrangler duratecs
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