Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

cummins swap into gm

Discussion in '1982-Present GM Diesel' started by 3car, Dec 19, 2001.

  1. 3car

    3car 1/2 ton status

    Joined:
    Dec 16, 2001
    Posts:
    976
    Likes Received:
    0
    Location:
    Hernando, Florida
    does anyone know who makes adapters to bolt a cummins 5.9l to a turbo 400 tranny?also does anyone make a wiring harness to do this,or am i stuck with dealer items?and what gearing would be best for a diesel truck with an auto trans and 38's?thanks...3car
     
  2. BlueBlazer

    BlueBlazer 1/2 ton status

    Joined:
    Feb 15, 2001
    Posts:
    1,940
    Likes Received:
    0
    You got two options here. You could find a 4bt cummins out of a chevy delivery van and try to buy the flywheel housing. Or you could go to Cummins and buy a new part. It is a Cummins item and Im sure they still make it. BTW, Im gonna be buying an engine in a week or two to start the same swap youre doing. Im gonna use a Dodge NV4500 and mate it to my np205 that I have now. I have 410 gears and I will have 305/85R16 tires by then which are a true 36" tall for everyday driving. The low gear of the NV4500 and the torque of the Cummins will be plenty while wheeling and the overdrive and tall tires will keep the engine right in its powerband while on the highway.

    82 K5, 6.2L Diesel, sm465, np205, 14 bolt welded, 8 lug 10 bolt lock right, 410 gears, 35" Mud Kings
    SPEAK SOFTLY AND DRIVE A BIG TRUCK
     
  3. pcorssmit

    pcorssmit 1/2 ton status

    Joined:
    Jan 2, 2001
    Posts:
    1,346
    Likes Received:
    0
    Location:
    Denver, CO
    I wouldn't run the Cummins with a 400, though I think it could be done as described above. The RPM range of the motor is just too narrow for a 3 speed. The first year or 2 they put them in the Dodge's, they ran 727s with 3.07 gears. With an OD, 33s work out well with 3.42s and 35/36s work out good with 4.10s. I am assuming your looking at 12 Valve motors, since they are much easier to swap. They tend to like lower rpms than the 24 Valves. I think the easiest way to do it would be to use a Dodge auto (hydraulic control, not electronic--they switched around '96) with a 205 t-case from a '89-'93 Dodge Cummins. For swap info, try <a target="_blank" href=http://www.tdr1.com>www.tdr1.com</a>, they have a conversions forum.

    Pete

    '83 K5, 350 TBI (ex 6.2), 700R4, NP208, Dana 60/14 bolt, 4.56s, Detroits, 3" lift, 15-39.5x15 TSLs
    '97 Dodge 2500 4x4 CC LB Sport, Cummins 5 spd
     

Share This Page