The tr4050 does not fit in a TJ. You have to cut a huge hole in the stock skid. Useless for any serious off-roading, impossible with any form of tummy tuck.
Any 4-speed manual experience here?
- Thread starter GASnBRASS
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Nope. 305 V6 with SM-420 transmission. Pure heaven - if you could beef up the front end of a TJ enough to support the weight of that monster engine that is!
The TJs do NOT have a low enough 1st gear - although that would be partly mitigated *IF* there were a 2LO option, preferably one that was easy to shift into. Novak does make an adapter for the SM-420, but the shift tower ends up very far forward and the transmission is on the tall side, albeit VERY short. There's nothing like the sound track of an SM-420!
With all that said, for wheeling I'd want a splitter with my SM-420 - 4 speeds really isn't enough, even I realize that. The 2-3 gap is VERY wide. For pulling a trailer or other heavy loads on road, its fine. I'd still rather have a gear or two more than the 420 offers, but it works.
I'm wondering if Novak will eventually have an adapter to install the 7 speed from the new Bronco. Its 1st gear is about the same as an SM-465 - around 6.5:1. Not quite as low as the SM-420's 7+:1, but still damn low. Something that Ford got right that Jeep missed out on...
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Yes. It’s insanely tall. It looks like an nv4500. How often do you hear about those getting swapped into a tj?
Thank you all. This feedback is why I ask the question before getting too involved down an endless rabbit hole of frustration.
Tremec is too tall.
AX needs deeper first. 3550 is only slightly better.
SM/NP/T - 4 speed gearing is too far apart and shifter is buried under the dash.
Tremec is too tall.
AX needs deeper first. 3550 is only slightly better.
SM/NP/T - 4 speed gearing is too far apart and shifter is buried under the dash.
Search around re: the Toyota R series transmission. Shares a lot of parts with the ax15 and there are rumors that it might be possible to get the R151F countershaft and 4.3:1 first gear assembly into the AX15. I came across some threads about it on pirate a while back but never did find any that claimed to have a working example.
I'll look into that, thanks. I wonder if the whole trans from a toyota could be used with just a bell housing swap, or is other stuff like the input/output shafts different.
The rear housing is different so it won't bolt up to a 231. I would suspect the output shaft is probably wrong too, and I think when I was searching I read that the input shaft was different. I don't know Toyota t-cases but I believe the one that came with the r151f was passenger drop. Maybe it's possible to swap the jeep input and output and rear housing onto the Toyota box?
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