Best auto trans for Cummins?

[1972K20]

Would it be easier to use a 6.2 or 6.5 with a 4L80E?

[COS399]

1972K20 - I am running a 4L80 behind a 24 Valve VP that is stock and a NP205 TC. I only have a little over 200 miles on it so far but it seems to work nice so far. I still haven't pulled anything with it because I need to put a GN hitch in it first. My 4L80 is all stock and I was told it came out of diesel suburban. You have to rev it up a little more than I am used to when you take off from a stop but it shifts smooth.

[1972K20]

Originally Posted by COS399

1972K20 - I am running a 4L80 behind a 24 Valve VP that is stock and a NP205 TC. I only have a little over 200 miles on it so far but it seems to work nice so far. I still haven't pulled anything with it because I need to put a GN hitch in it first. My 4L80 is all stock and I was told it came out of diesel suburban. You have to rev it up a little more than I am used to when you take off from a stop but it shifts smooth.

How did you set it up?

Did you use anything like this:

http://www.transmissioncenter.org/cu...bt_adapter.htm

[COS399]

Originally Posted by 1972K20

How did you set it up?

Did you use anything like this:

http://www.transmissioncenter.org/cu...bt_adapter.htm

Yes, I had to purchase the transmission adapter, flex plate, new starter, PCS transmission controller, I had to get a spacer to connect the Trans to the NP205, and run a transmission cooler. The Dodge Cummins radiator lacks the transmission cooler connections. My PCS transmission controller has to be hooked up to a computer to change the settings but they make one with adjustment settings on the controller itself. It's definitely not cheap.

[Dieselwrencher]

Originally Posted by 1972K20

Would it be easier to use a 6.2 or 6.5 with a 4L80E?

It definitely would be easier, but why? Then you're sitting on a grenade that has less power than a 4bt.

[1972K20]

Originally Posted by Dieselwrencher

It definitely would be easier, but why? Then you're sitting on a grenade that has less power than a 4bt.

Haha...yea, well, I'm trying to explore different options. My main goal was to have a 4spd auto w/OD and a 12v Cummins. I prefer the 4l80. However, I do want to keep cost at a minimum. I've thought about the 6.5. I know they don't compare to the Cummins, but I've heard the 1999 and newer 6.5 have a lot less problems than older 6.5s