When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I bought a new rear diff for my ‘68 to swap out. My old diff was from a ‘64 with an open rear and 3.36 gears. The new diff is a supposedly a 3.70 with posi. I bought it from a Corvette shop. It says “LR W 063 E 1”
My issue is that I was swapping it out and I have it out of the car. The front u-joint link is bigger than what came off my car. I figured I could just pop off the old one and swap it with the new one but when I took them off, the thread is different. What do I do now?
As mentioned, the new diff has a 1330 30 spline yoke. The 63-4's and some early 65s had the 17-spline pinion yoke you have. The 17 spline pinions were junk and often snapped in half, one reason they stopped using the DANA.
You have more trust than I do if you bought a diff from a vette shop. Now you have the yoke off you need to correctly install either a 1310 or reuse the 1330 with 1310/1330 joint and preload the bearings. You should also replace the seal and axle seals too. I would look very closely inside the new one. I just inspected a vette shop original diff last week, had worn axles and one was std the other HD., They didn't come that way.
Good luck
JD, the guy who posted above your last post GTR1999 is THE authority on these rears. what he says is gospel and if you find that diff needs rework-which most do-you need to discuss the rebuild with him. like all the best in their field, he is usually backed up a bit. and he is also generous with info that we all need.
JD, the guy who posted above your last post GTR1999 is THE authority on these rears. what he says is gospel and if you find that diff needs rework-which most do-you need to discuss the rebuild with him. like all the best in their field, he is usually backed up a bit. and he is also generous with info that we all need.
Agreed! Gary, @GTR1999 is the authority on C2/C3 Differentials.
Well, I am sort of in a time crunch. I started the project thinking it looked easy, which it was but I leave town on Tuesday for a few weeks and my wife wants the garage back before I go so here is my game plan.
i am picking up a 1310 to 1330 u joint today. Ill install it all and t least be able to clean the garage and move the car. If at that time it doesnt work or it breaks then Ill take it for a rebuild and go have a talk with the corvette shop. I uave known him for a while and I believe he will help with the rebuild or offset some cost.
I doubt it,
I have been scrounging up the parts for my rearend/2004r auto swap for a year now and have seen these parts online I believe Dennys driveshafts carry these conversion ujoints (ironically they are local to me) but I seen a fe while googling. I ended up finding the correct yoke for my trans/driveshaft since my issue was at the trans end.
From 1971 till 1977 "LR" was used. The stamping began with two letters for the ratio code, a letter for the axle plant, one to three numbers for the Julian day of the year, a letter for the Positraction source, and a number for the shift.
So Your Diff is an LR= 3:36 W= Warren 036= 36th day E= Eaton 1= 1st shift
Need help with rear diff
