Has anyone swapped a ZF 8HP70 behind a Cummins in a pickup?

[Jake396SS]

I have been following the Zero to 60 Youtube channel and they have been doing ZF 8 speed swaps into many vehicles including Toyota Land Cruisers. It seems to me that the Dodge/Ram Cummins guys have been poorly served in the transmission area, and one area they need help is more gears. I'm talking about regular use situations not competition. I realise that you would need to limit the power output of a Cummins behind an 8HP70 to 400 or thereabouts but the idea is interesting. The 8HP70s advantages are lots of gears, and once the vehicle is moving, everything is locked up so no slippage and little heat is generated. There's also the excellent TurboLamik aftermarket transmission controller to run it with. Here is a video of an 8HP70 in a Land Cruiser

 

[Jake396SS]

Zero to 60 Youtube channel

 

[MrMarty51]

That would be a nice option.
I wonder if that transmission would fit behind the 6.5 diesel ?

 

[MrMarty51]

Welcome to the forum Jake.

 

[Will L.]

I would think the 8HP95 would be the better move if going that direction because the base -70 unit although hanldes hp ok struggled with torque. Diesels kill transmissions with torque not upper rpm hp. And the basic rule is 2:1 so a 400hp cummins should deliver 800 torque. Although you can build a 70 to handle it- you are already spending big bucks in the system so just jumping to the -95 seems better for long term life.

But the stronger more proven trans is the allison- so why not go that route is my real inclination.

 

[Will L.]

Here is what the better transmission looks like when used to full power