i plan to put in a 5.9 cummins motor in my 1980 k20 truck an i need help on wat type of tranny i should get?

 

Welcome to db
Moved to Diesel conversions

I was going to do this in my 79 and was just going to get the chevy adapter for the 5.9 and bolt it to the TH400.

 

but i plan on getting propane an mayby water meth you think a th-400 would be able to take that much to torque.

 

I'd like to drop a 6bt in my 78 K20 but the adapter from Advance to mate my Sm465 to the cummins is quite pricy so if I were to do it I'd just run the NV4500

 

ill post some some pictures up but. another problem i think will be the wiring but i was either thinking mayb a eaton eight or 5 speed.

---AutoMerged DoublePost---

the whieght of the truck is only 4890 pounds an thats with the 355 motor an th350 thats in it rite now so im sure the truck would be super quick

 

Unless you are building a 600 hp+ truck, I believe a TH400 would do well.

 

400 tranny will never hold up 2 much torque nv4500 only way 2 go trust me experienced this. spend your money wisely invest it in nv4500

 

It's funny you say that because I have burned up more NV 4500's than th400's in Cummins converted Chevys.