SirRobyn0
Full Access Member
- Joined
- Dec 6, 2019
- Posts
- 6,738
- Reaction score
- 11,293
- Location
- In the woods in Western Washington
- First Name
- Rob
- Truck Year
- 1984
- Truck Model
- C20
- Engine Size
- 305
Ok so I'm looking at possibly purchasing this rear end. As some of you might remember I currently have a 3.41 14B SF in my 84 C20. I need lower gears and would like to go to FF. The one I'm looking at is a 14B FF, seller described as " 14 bolt FF that is a later model unit, but was modified to fit a square." I asked if he knew the approximant year of the axle he said no. He also said that modifications done were solid. He got the truck for parts, so he did not modify or install the rear end. I'm assuming it is out of a GMT-400 but obviously have no idea if it is out of a van or truck. IDK what modifications would have been needed from one of those rigs to make it work in a square. I know and understand the pit falls of buying a used rear end. The plan would be pull the cover, inspect, change fluid replace the brake shoes, springs, cylinders and drum / axle bearings. Hopefully the pinion and ring and pinion are ok.
The main thing I need advice on is what would likely have been modified to make a GMT-400 fit in a square? And any pit falls you can think of relating to that I should be concerned with if I go look at it in person? Given the limited information available what do you think is the likely hood of requiring driveline modification, beyond possibly a different U-joint. If it's a bad idea to get involved in this please say so.
Differential is priced reasonably and is geographically close to me, which both make it attractive. Here's the pic from the seller, maybe you'll see something in it noteworthy. (computer is being difficult hopefully will have a pic up momentarily.)
Thanks!
The main thing I need advice on is what would likely have been modified to make a GMT-400 fit in a square? And any pit falls you can think of relating to that I should be concerned with if I go look at it in person? Given the limited information available what do you think is the likely hood of requiring driveline modification, beyond possibly a different U-joint. If it's a bad idea to get involved in this please say so.
Differential is priced reasonably and is geographically close to me, which both make it attractive. Here's the pic from the seller, maybe you'll see something in it noteworthy. (computer is being difficult hopefully will have a pic up momentarily.)
Thanks!
