I have a 1990 chevy camaro rs. Will a rear axle from a 1985 z28 posi disc fit? Do I need an adjustable proportioning valve? And do I need to change anything about the brakes

 

Yes. No. No.

All these could have been answered by looking & reading on TGO. Axle swaps are nothing new here.

 

Thanks how do I calibrate the tach and speedo if they are off from the change

 

I did the search for you....
https://www.thirdgen.org/forums/sear...archid=3572930

 

I just read that for the best brake performance I should change the p valve I'm not questioning your knowledge just want to make sure it all works

 

You will find people with opinions going both ways.

Technically for the "best" performance? You probably should. But I know many people who have swapped from drums to discs & experienced no problems.

 

Ok sorry to keep bugging you but does it matter if the brakes r forward facing

 

You mean with the calipers mounted to the front of the rotor? I don't think I've seen a 3rd or 4th gen rear end that way.

 

From the pics of it it looks that way. I'll check. Oh how do calibrate the tach and speedo if they are off after the swap

 

The driver's side will be clocked toward the rear, the pass side the front. More info about master, combination valve, speedo gears and parking brake cables can be found in the following link:

https://www.thirdgen.org/forums/tran...-10-bolts.html

Tach won't matter. For speedo gears (T5 and 700R4), check the stickies at the top of the page.

JamesC

 

I see the driver is in the rear and the passenger is front mounted I see that my rotor sizes are different 11.6 90-92 and 10.5 82-86 can I change the rear to match the fronts

 

You've already been given links that contain answers to your questions. Go read.

 

So that you have 10.5" rotors and iron Delco-Moraine calipers on all four corners?

You could, but the 11.6" rotors and alum PBR's calipers are superior to the Delco's. The best idea would be to swap the PBR's to the 85 rear and eventually upgrade the front to match.

JamesC

 

I'd like the 11.6 rotors and alum pbrs on the rears no sense in down grading. Will I have any issues at a part store asking for them to put on my car with a different rear end

 

I read the speedo gear article to change them confused as hell

 

The process isn't difficult, but you'll have to remove the axles. Here's info that you'll need:

https://www.thirdgen.org/forums/faq-...iscs-89-a.html

JamesC

 

So I just need get p/n 164345/164346 for the calipers and brake pad will I neeed new back plates and does advance have them

 

I see gm has 10 bolt back plates and I see where to order new lines will all these part numbers be the same

 

Alright then final thought so if I order all the parts from your Notes then I should have no problems with the setup. And what did I need to remove the axles for

 

If you put the bigger brakes on the older rear end & you'll still have the smaller axles. 26 vs 28 spline.

And it is way easier just to swap the whole rear end, than it is to swap brakes onto it.

 

Well I don't have to but I've been looking for a rear for mycamaro for awhile andits Ben tough I gues I could look for a 90-92

 

Since I have been having trouble finding one it might just be easier for me to get this axle and put the 28's on it and put the new calipers pads, back plates and lines

 

You no I'm just going to look for a newer one with the 11.6's and alum pbrs on it and just clean it up no sense in making more work for myself by removing the axles thanks for the help.

 

it should be prity much straght forward to do it seems

 

Yeah but if I can get an 89-92 then I won't have to change the axles or anything else unless they are bad. I may just have to change the seals and fluid I'll keep looking I'm waiting on a reply from someone who has an 89 with 411 gears

 

JamesC, i will be doing a rear swap this weekend. However, i don't have a lot of metric tools. I can borrow whatever i need tho. Can you fill me in on what size metric sockets i need besides a 19mm?