np435

[currupt4130]

so i found a better alternative to my tranny swap. the np435 is a ford tranny with 6.6, 3.09, 1.7, 1 gear ratios, much better than the sm420 and i can still adapt it to my jeep for the same price, driveshafts might need to be lengthened which is always a plus. does anyone know anything about this tranny that i should kno, anything bad? im actually looking for torque ratings on it versus the sm420 and t-18 if anyone knows where to get that.

the modifications to put this tranny in include
a new input shaft
a new mainshaft
an adapter plate for the bellhousing to tranny, (which is why you need a longer mainshaft, older models had the longer one so its not super outrageous to change it.)
and and adapter to go to the tcase, which is where the mainshaft comes in, ill also need a new input gear for the tcase so if anyone has a 23 spline input gear let me kno, preferablly a 94.

what does anyone think about rotating my 231 perfectly flat? any pros or cons? i can re-drill the adapter to do so and i might be able to make an almost flat skid out of 1/4inch or 5/16 plate!

[Junkpile]

Could you use the ford Tcase that would be attached to the back of that transmission already? Well....that is if you get one from a 4x4. I'm not sure if that's an option or not, but it would be a drivers side drop just like the 231.

[currupt4130]

that might be an idea, if i find one like that for a reasonable price that might be the way to go. what tcase would that be?

[Junkpile]

I don't really know for sure. I'd assume the older ones had the NP205 behind them, and the newer(80s+?) ones having some sort of chain-driven aluminum cased unit similar to the NP208 that GM used. Those later aluminum Tcases used in fullsize trucks would be a pretty good option for a light little Jeep. The 205 is the strength king, but the later units have better ratios and are plenty strong for a SWB Jeep.

[Junkpile]

I don't really know for sure. I'd assume the older ones had the NP205 behind them, and the newer(80s+?) ones having some sort of chain-driven aluminum cased unit similar to the NP208 that GM used. Those later aluminum Tcases used in fullsize trucks would be a pretty good option for a light little Jeep. The 205 is the strength king, but the later units have better ratios and are plenty strong for a SWB Jeep.

[currupt4130]

hmmmmm sounds like it might be a plan, the kit to adapt the 231 is 500 bucks so that might be a good alternative if theyre stick shift style t cases

[Bounty__Hunter]

Adapters? That's an awful lot of money spent on adapters. Cheaper and easier to find drivetrain components that bolt right up. What's your end goal with having a heavy truck transmission?

[currupt4130]

the end goal, its shorter than my drivetrain now, (better angles cuz my cv will max out if i were to drop my rear end), a stronger drivetrain that i can run around town and then beat the hell out of in the mountains and still drive it home, and better gearing without spending the money on ring and pinions (resulting crawl ratio with first gear is 73:1) there isnt much that bolts up to the 2.5, a nv4500 and kit will run 3000+ and everything else is just so old and so tricky to adapt. the majority of the money is for the tcase adapter, the plate to bolt to my bellhousing and the new input shaft are only 100 each, it coems out to about a 1500 swap all said and done, half the price of an nv4500, slightly more than a rebuilt ax5 and much better