Possibly swap a 6.5 in my 89 with th400?

Discussion in 'Transmissions' started by Johnny89345, Jan 10, 2019 at 6:09 PM.

  1. Johnny89345

    Johnny89345 Newbie

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    Like the title says my 89 k3500 has a 6.2 diesel and a th400 operated off of a vacuum pump and vrv valve. What if i swapped a 2002 6.5 diesel and left the ip electronic. How would the vrv operate? is that even feasible? I just cant get this 6.5 idea out of my head and the only other trans i really want to put the effort into swapping is an nv4500 which is dependent on the deal i come across!
     
    Last edited: Jan 10, 2019 at 6:29 PM
  2. 454cid

    454cid I'm Awesome

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    Where are you getting a 2002 6.5L diesel? Did vans still use them, or are you talking about a Military take-out?
     
  3. someotherguy

    someotherguy I'm Awesome

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    Possibly military or a 3500HD.

    Richard
     
  4. Johnny89345

    Johnny89345 Newbie

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    I misread it is a 2000 c3500 dually on property room For sale.
     
  5. jdla140

    jdla140 I'm Awesome

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    You'd need to fab something up to operate the VRV. Just take the turbo/manifold off the 6.5 and put it on your 6.2, it'll be much more reliable than a 97+ 6.5.
     
  6. 454cid

    454cid I'm Awesome

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    I thought the later castings were supposed to be better, or is that not till you get to the AM General stuff after GM was done with it?
     
  7. 454cid

    454cid I'm Awesome

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    Oh yeah, I didn't think about the HD.
     
  8. jdla140

    jdla140 I'm Awesome

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    a 2000 block will be "better" than a early 506 block with large outer main bolts, but not as good as a 660, or 599 6.2l. Even heath diesel's land speed truck used a 6.2 block
     
  9. Sparkysikes

    Sparkysikes I'm Awesome

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    I did the military 6.5 and put my turbo stuff on it. And the best trans for the 6.5/6.2 is the 4l80e. The gear ratios match the motor much better. Lower rpm shifting and still move faster. That's why I swapped my nv4500 for a 4L80E Great move albeit lost 1 mpg
     

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