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Yes, parts are interchangeable between these trannys.Inputs, output shafts, front nose cone, and rear housing are different but generally can be interchanged if you stay with in the family.There are three "R" familes;86-91 early, simple, common, heavy designThe Jeep 86-00' AX15 would use the same bearings, syncrows, and gears within the same family as the toy boxes. Remember that only the 86-87' 4x4 R151F 22Rturbo got the 4.31 1st gear. Hope this quick answer helpsMC
Wouldn't it be possible to rebuild an early R series with the longer AX15 input shaft? That way, one could use the stock Turbo Supra bellhousing to drop the 7mgte into a Toyo truck.... The AX15 input shaft is only a quarter inch longer than the R154 one. Not a big deal. So... could this be done rather than having a new bellhousing cast?Greg
I have never had to opportunity to upgrade a AX15.This can be done but only to a 86-91 AX15. The longer corse spline input and Jeep nose cone will swap right in The AX15 bellhousing will also bolt up to the front of the R151F since both front housings are the same!I send both Toyota and Jeep shafts to my drive line shop and have them put togeather.Marlin
How do you plan on keeping the input shaft from bottomiing out in the pilot bearing?
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