My name is Bas, living in The Netherlands. 29 years old and bought my first Wrangler about a month ago. Nice to see there is a big community supporting those great machines. I will read a lot and will place a question now and then. When I start the restauration I will open a project topic. I will try to communicate in my best English.
The Jeep Wrangler I bought is a mid 91 4.0 H.O. Laredo. I am planning to restore it in about a year. Till that time I just going to drive and enjoy it. The chassis is in very good shape. The body and interior has some work.
I have read a lot about the Wrangler and noticed that there is written a lot about the Peugeot BA-10/5 gearbox as it will break down easily. The AX-15 used on later models is much stronger.
Now I want to check which gearbox is used in my Jeep. What is the easiest way to confirm without removing any parts? Or is the Peugeot not used on the 4.0 H.O. models?
I read that the part keeping the shifter in place on the AX15 is secured with 4 bolts, the Peugeot with 3. So removing the rubber cover should do the trick?
^^^ To confirm this for yourself, and for the benefit of anyone else looking at this thread in the future the critical visual difference between the 2 transmissions in question are the case. Crawl under there and look at your transmission. The BA 10/5 case is bolted down the middle, side-to-side, kind of like a suitcase would be. The AX 15 is bolted together front-to-back. I do not have photos of the BA in my files, but here is a photo of the AX 15.
Comparison shot of the NV3550 on top, and the AX 15 on the bottom. Sorry I don't have photos of the BA 10/5 but there are a lot floating around on the forum I will snag and edit in here for you if I can find them.
....I'm not smart, but I can lift heavy things.......
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Left is AX-15 (good transmission for an offroad jeep) right is BA10/5 (slightly undersized, but ok for on road driving. Not worth repairing in the states due to the number of cheap AX-15 transmissions available from the junkyard). Your mileage may vary, as rebuild kits may be cheaper to get than an entire transmission in the netherregions.
However, you should also note that the 1991 Wrangler came with an AX-15 transmission. The BA10/5 stopped being used mid way through 1989.
Notice the rugged looking structural exoskeltal formation of the AX-15 on the left. On the right, the BA10/5 is buttoned up along the longitudinal axis (bolts face laterally left/right) and it doesn't have the same pronounced lateral structural shaping. Don't use color as a guide here, as oil can easily taint your identification.