swapping a np435 into a 75 cj5

I found a cheap ford np435 and am wondering what all will be involved in a swap of this type.
my jeep is a 258 with the t14 and dana 20 transfer case.

From the info i have read my bell housing will be incompatible due to the longer depth.
Anybody know which bell housing i could use?

I read that i will need a adapter kit to mate up my transfer case to the np435.

has anybody done this swap?

what else will i need?

thanks

 

Try Novak adapters


http://www.novak-adapt.com/knowledge/np435.htm

 

yeah thats where i found the adapter for the t-case

 

the bell housing you need is the one that goes between a 258 and a t5 manual tranny
I did this swap in my old cj8, you had to drill and tap one hole in the bellhousing
and swap the clutch disc, for the 1-1/8" ten spline that matches the NP, and the spigot bearing
you will find all the info on Novaks

I love NP435's

you will have a very short rear tail shaft, no probs for me with CJ6

 

The 435 is an inch shorter than a t18, so the rear shaft will be fine. It also has a lower granny gear 6.69 vs 6.32.

 

I'm in the process of this swap now with a T-15 d20 to a NP435 d300 and I used a bellhousing off a T-176 tranny. It is 1.5" or so shorter but by the time I added the Novak adapter for the Dana 300 i'm putting in it, My rear shaft has to be 3" shorter and front 3" longer. It is a 80 model short shaft d300 that is the same length as my d20.
The d300 adapter is 3.2" and the d20 is 3.5" but that would be nulled out by the length differences in the T14 and T15.
So, you would roughly have the same driveshaft lengths as me. I went with a CV on the rear due to it being only 15.5" long now.

 

Yes, the bell from a T-14 or T-15 transmission will not work.

You can use the bell from a Jeep T-176 or T-150 transmission without modification. The bell from a Jeep SR-4, T-4 or T-5 transmission mated to the 258 or 304 will also work (not a bell from the 4-cylinder engines), but you will have to drill new holes in the bell for the transmission mounting. The casting for these is the same as the T-176/T-150, but the holes are different.

 

i performed this exact conversion in my "5" several years ago. i used a bellhousing from a t-176, and clutch assembly from a t-18. i used the novak kit to adapt the d-20 to the 435. you'll need to determine whether your 435 is a 2wd version or a 4wd version. one version has a "square" bolt pattern for the output shaft, the other version has a "trapezoid" pattern for the output shaft.

i replaced both driveshafts with brand new, rather than trying to monkey around with fitting some existing shafts.

consider that to make this work, you'll probably need to relocate your transmission/transfercase crossmember. the 435 is a monster compared to the t-14. if you use the stock crossmember location, i'm pretty sure you'll have clearance issues, and various parts of the transmission will bump the "tunnel" during even light wheeling.

my solution was to set the crossmember slightly further back, and to modify it to drop more in the center, having the 435 sit lower so it didn't "bump" things.

the performance of the setup far exceeds the t-14. while converting, consider also adding a hydraulic clutch.

wally

 

thanks for the info it seems like the hard part will be finding the right bell housing

 

toy89yota,

Sent you pm regarding bell housing.

Ed

 

do you know what year jeeps had the t150 and t176 trannys?

 

never mind found the info on novak t150 76-79 and the t176 80-86

 

You can also use a bellhousing from a CJ with the T-4/T-5 or SR-4 as well. You have to drill and tap a couple of holes but the bosses are there for that and many of them already have pilot holes in place.