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Cummins 4BT swap?


mornin151

Well-Known Member
Joined
Mar 1, 2009
Messages
145
Vehicle Year
1984
Transmission
Manual
Ok i know there are afew guys that have done them, I know of 2 98+ rangers and a 2nd gen as well.

I've done some searching on this whole thing. I know they had them in some bread trucks and they use a chevy bell housing and ran a turbo 350 or 400 trans. I know they are used in boats as well but they dont last very long in them. I know that they are about 3 times the weight of the 4.0 I have in my 93 ranger but I would like to try this swap now, I've tossed the idea around a couple times and I just wasnt able to do it.

Where I need help-
1) I understand they make the 4b with many different Hp ratings, so what one would i want for my ranger? i was thinking about 160-200 Hp.

2) This would be in a 93 4x4 ext. cab. I would like to keep it 4x4 and from my understandings almost all Chevys T-cases are on the right and the rangers is on the left. I thought about using a Straight axle, My cousin told me some of the First bronco's like from the 60's and 70's would have a solid axle that i would have to deal with shorting it up. But as of right now if I could just keep my Front end alone and weld some plates on them and reinforce them I would be very happy and worry about a new axle for another time but I still have to worry about new Coils. I know it is common to use a F150 to give it alittle lift but would They be strong enough to hold that motor? or would I have to try something else?

3) rear end. From my understanding the Hp for the 4.0 and the 4bt are very close its the Tq. that would kill my rear end? If I would blow my rear end would I be able to beef it up or shound I deal with shorting a 9 inch.

4) trans, I would be doing a manual swap. This is the only transmission I would be willing to use with this motor is a manual set up. the question is what chevy transmission would be best? I would like to have a 5 speed or a O.D. but that 700R4 in the automatic state is nothing but a slush box IMHO.

5) kind deals with transmissions also but another reason im doing this swap is cause of MPG and its kinda different, My cousin said i should be able to pull 25 with it if i play my cards right.


So are there anything that Im missing about this that would go wrong? I was thinking about just buying a whole running truck that had the motor and the chevy bell house on it and just pull the motor and all that, and sell or scrap the rest of the truck.
 
well, i'm getting 21mpg with my 2.8. you're adding a LOT of weight to the front. that will negate some of the added mpg's you're looking for i'm sure. axle gears and tire size will have a serious impact on getting the most from a na diesel for both power and economy. will the 4b put out 200hp without a turbo?
this is the kind of swap that's usually done by those wanting something different as you said, due to all the other suspension and chassis work that needs to be done with it. getting a complete truck and using as much as possible from it would be the obvious best choice for your build... imho. good luck with your project.
 
when you said get a compleat truck are you sayin one of the bread trucks i was talking about getting or are you talking about a whole other ranger?
 
the truck the diesel is coming out of. everything would be there that you need instead of making many trips to the parts store or jy for what you didn't get. that would include lots of metal for fabing up brackets, mounts, etc.
 

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