The T-19 should bolt right in. However, you might need a different tranny crossmember. I don't know for sure.

You'll find T-19 4-speeds in F250 and F350 trucks with 460's and diesels. You'll want the 4x4 model that takes a married transfer case.

If you have the tags off the transmission and the cast in numbers, you can google those and come up with the model number.

The code we need is off the driver's side door jam under "TRANS".

A = NP435
B = Clark-4 Speed Over Drive
F = Borg Warner T-18
P = Borg Warner T-19

 

even though i cant 100% rely on the door code (as it says i have a 302) its reading Clark and that's what i already suspected it to be.

so when i get a replacement trans all i will need to pull is the trans and the cross member with it. There wont be any clutch linkage issues or problems with bolting to my current bell housing and transfer case?

again thanks for the help!

EDIT

also looking back at what you said this truck originally had a 302 which is likely the reason for the odd pairing of engine and transmission.

 

hahaha reverse is something serious! i"m familiar with borg warners reputation for durability But not the new process. Is the new process as durable?

 

The NP435 is very similar to a T18 & at least as strong.

I know a lot of people like them, but I found their gear ratios a headache.
1st & reverse are very low (you have time for a coffee while reversing out of your driveway ), which is good for heavy trailers etc.
But that leaves you with three driving gears, & the gap between 3rd & 4th is wide.........so if you are forced to downshift to 3rd, you can be stuck there for a long time sometimes - unable to gain enough speed to get back into 4th, or pass a slow vehicle, if you're climbing a hill.

In a flatter area than me, this is probably no problem, but I replaced it with a close ratio T19, & find it excellent.

As Alvin said, there are different T19's, you need to know what you are getting if you want a deep 1st gear. There are also non-Ford T19's which won't work.

 

ok guys so I went ahead and pulled the tigger and bought a t-18 for 200$!! the only thing that worries me now is thay it didn't come with the t case adapter. I guess ill figure out if it fits or not. I will find out if it fits Monday.

 

With 35's and a T18, I was messing with my friend at his garage, put the truck in first and got out... walked up to him and asked "Have you seen my truck? He looked at me confused and walked outside right as it idled by the garage

(note, don't attempt this unless you have acreage! I'm pretty sure it'd idle itself up a tree!)

That being said, 3rd is my main go to gear in the town (dogs out in 4th)....But for more fuel efficacy I think just gotta find a ZF or something..

 

so my fears came true. My tail shaft housing from the Clark will not fit on the t18. Where can i get a tail shaft housing for it?

 

so more issues have came my way! the t-18 i got was bad and i took it back. it had been sitting and sized up 1st gear. so i went and bought a piece of crap 85 that is held together with bondo and overheats. It has the np435 and upon driving it the transmission felt really good. For 700 bucks i bought it and will use that truck to replace the transmission in mine.
many other parts are good what all should i pull to sell and make a little moey??