Chevy full-time transfer cases

Post by **hklvette** » Thu Jan 24, 2008 4:11 pm

Which cases were used for full-time apps in the late 70s? Laura has a '78 3/4 ton whose t-case has a habit of jamming itself in neutral, and I need to know what swap candidates are available. I believe the transmission is a 700R4, if that's any help. Thanks.

Post by **jac6695** » Thu Jan 24, 2008 5:51 pm

New Process 203. Look for a New Process 205 for same transmission.

Post by **hklvette** » Thu Jan 24, 2008 6:43 pm

Will a 205 require driveshaft change or will it bolt right in?

Post by **The Beav** » Thu Jan 24, 2008 9:20 pm

Not going to be a 700R4, thats for sure, a few years too early for that. Most likely a TH400.....

Adjust the shift linkage?

Post by **hklvette** » Fri Jan 25, 2008 9:25 am

I'll definitely try adjusting the linkage before pulling the case. Would a TH400 be behind a 350 from the factory? AFAIK the entire drive-train in this truck is original. Just curious...

YouTube · Post by **TerryD** » Fri Jan 25, 2008 9:27 am

Its a TH350/NP203 combo is its 70's small block. Maybe a TH400, but they were usually behind BB's and in ton trucks.

Post by **Billet Benny** » Fri Jan 25, 2008 3:35 pm

Most likely the th350/np203 combo.. I have a 203 that mates to a th350.. It's in my for sale post. It lacks one detent ball that I stole for a spacer for the valve in my hydro pump for my bender. You can scrounge one from the current case to make it 'complete'.