I'm planning on buying a rear end from zip. My question is what other parts will I need besides the differential? Will I need something to correct the speedo or will I already have that? All I have to do is take out my old rear end and put the new one in, right?

Thanks :chevy

 

Jay,

I did my 90, and some tings are different for a 94, but I'll take a crack.

For the 90, there was this mysterious gue that you are supposed to apply to the c-beam where it attaches to the tranny and the diff. I did not use it. Hard stuff to find.

Some other things to consider. This is a great time to replace all the rubber bushings. If you do the ones on the diff, you will need a machine shop to press in the new ones. It may also be a good time to consider doing u-joints too.

To correct the tranny, I believe you can do that in a 94 with some kind of programmer to correct it in the ECM. My year needed new plastic gears, which were kind of a pain to sway out.

One other thing to consider. If your car is an auto, then you have a Dana-36. Many like to upgrade them to a 44. That takes a lot of parts. However, if you are going to stick with a 36, there is a new carrier cover available from Ikerds that helps beef it up.
http://www.vettepart.com/

Wish I had known about that when I was doing mine.

Also, some folks do a little trick to help drain the diff. They drill a small hole from the inside of the diff thru the lowest bolt hole that holds in the cover. That way, when they want to drain, they just remove the lower bolt and it all comes out.

Took me about two days, but I had to wait for a machine shop to open to press in the bushings :smash:

 

Jay, I just finished this mod a few days ago but went the Dana44 route. I changed the u-joints because it just seems like the right thing to do. Really the only thing you need to have for the install is "the right stuff" sealant for the rear end cover, 1 quart of rear end lube, posi additive and time.
I changed out the c beam, driveshaft, yoke, new poly diff bushings. The new poly bushings really stiffen up the ride of the car. I think a bit too much, but damn if it doesn't corner better and hook up more. I'm sure the new sway bars add to this as well. Got both bars online for about $170 shipped.
You will need the HPIII for the speedo thing. Get the car up there if on the ground. Make sure you have 10 thru 18mm sockets and wrenches. Good luck. :D

 

I'm going to have mine done at Doc's Corvettes in Tulsa. He said he will swap them out for $200. I'm just wondering if he needs any other parts besides the differential? Thanks for your replies.

 

BTW I'm getting the dana 36. I only go to the drag strip 1-2 times a year and drive pretty mellow the rest of the time, so I think the 36 will be fine.

 

ttt

 

Jay,

I got the same rear end and installed it myself. The only thing you are going to need, will be a way to correct the speedo. Mine was changing the gears in the transmission. Yours requires a program change. You might want to consider the hypertech programmer and a 160 t-stat while you are at it. Good luck.

 

Nope. I'm sure they have sealant for the cover and are aware it needs to setup overnight before filling with fluid. If you are interested in the beefier Dana 36 cover talk to Justin at Zip, I believe he sells one also.

 

For $200 I would let someone else do the work. :yesnod:

 

I plan on getting my computer done by Ed Wright, so that should take care of the speedo.