Maybe this will help,

http://www.cumminsforum.com/forum/89-93-non-powertrain/1769729-w250-gas-diesel.html

 

Thank you and do you know my gasser frame is 4x4 and the cummins was setup for 2 wheel drive would it be possible to put the tcase ftom the gasser onto the engine and tranny for the cummins or would that not work

 

Well, lets get this squared away for the other guys who will chime in on what you want to do,

#1 you have a 1989, W250 (W=4x4) 360cid gas engine complete truck and running gear?

#2 you have a front clip including Cummins Engine from a D250 (D=2 wheel drive) was this a automatic or manual truck?

#3 is your 1989 W250 a manual shift? or automatic trans? What kind of trans do you want in your finished truck?

 

#1 yes

#2 yes and both are manual 1989 has 4 speed and 1991 has 5 speed

#3 I want a nv4500 or a nv5600

 

i'm not sure on the output shaft spline counts of the nv4500 or nv5600, but if your 1989 has an np205 transfer case, then it should be a 23 spline. whatever trans/transfer case you end up going with, just gotta make sure they are the same spline count on the input/output shafts.

your w250 gasser will have a dana 44 front and dana 60 rear. the rear will hold up fine, the front will be tested to the max with the weight and power of the cummins. depending on how you use the truck, you'll want to decide whether it's necessary to go to a dana 60 front or stay with the 44.

 

Ok thanks im new to all of this stuff so im on a learning curve

 

nv4500 diesel is 29 spline shaft. nv4500 gasser is 23 spline shaft. nv5600 is 29 spline shaft. early nv5600s are very very hard to get parts for. get a late version if you go that route. a g56 would be a better choice if you go 6sp. you can get a 23 to 29 spline adaptor from shs diesel for around 170 bucks.

 

Ok thanks and a g56? Is that a transmission? If so is it a good one?

 

It's a 6 speed manual that replaced the nv5600. It's a great transmission. Look up philip's "never ending project" thread, he did this swap and has all the info

 

Do you know will my transfercase fit on my engine and tranny from the cummins