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What to expect when swapping a 9" in? What for brakes?

4.3K views 16 replies 10 participants last post by  Whittaker  
#1 ·
Just shooting a not out to anyone who has swapped in a 9" rear. I have gears a 31 spline posi unit and two housings. I know I'll have to get the drive shaft cut or lengthened.

I beleive I'm going with a Moser rear. I think they have an axle where I keep my GM brakes. I would like to swap to discs though. I have thought about the Ford Explorer discs, or use GM rear discs and the Cadilac calipers I have all ready but then what to use for backing plates and brackets?

What other things will I run into?
 
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#2 ·
I put one in a Nova one time with some help and it went in pretty smooth. If it is a different width you may have too buy new wheels too get a different offset or narrow the one you have. Driveshaft shouldnt be a big deal. Do you have the housing, or do you have the center section(carrier).
 
#3 ·
Just the carrier. I plan on getting a bolt in housing. Right width and mounting points.
 
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#5 ·
Phil68Chevelle,

Did Moser supply the brakes or who? Who was your supplier if I may ask? Did you get a Moser center section?
 
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#6 ·
My new complete moser rearend will be here tomorrow and installed this weekend. Its for my Nova but other then the suspension aspect they should be similar. I ordered there drum brake kit. I will comment and take pictures sometime before the end of the weekend about how it turns out. My biggest concern is the e-brake and if I will need to change anything there.
 
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#7 ·
if you want moser will put gm ends on your rear so you can use stock brakes from your 10 or 12 bolt rear, but you have to have the backing plates bored out a little to fit-instead of disc's on the rear(adding disk's is a pain to get them to work right unless you know what your doing) i would use stock brakes or get the big brake conversion (i think mp brakes sells them)
i made many passes in the 9's and had no trouble stopping with the stock ones
 
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#8 ·
I'm also running as 31-spline 9-inch. I got the Currie housing with the A-body brakets already welded on so it was a bolt-in deal. Currie also mounts the shocks closer to vertical than factory, so they are more effective. I used Baer's 9-inch brake kit, which comes with all the correct adapters and is very complete. I told Currie and Baer I wanted GM bolt pattern, and they made it happen with parts in stock. No big deal to accomplish.

S~
 
#10 ·
I opted for Ford Explorer 11" rear discs on the 9" I bought from Currie (complete, bolt-in assembly). Currie mounted the brakes, I had to use Lokar e-brake cables to hook up the e-brake. I think the Ford Explorer kit price is $400 + $100 for the Lokar e-brake cables + $36 for the flex hose off the rear caliper to hard line. I'm very happy with these brakes and the rear-end for that matter.
 
#11 ·
Alan What was the total price of the Currie rear? Why Currie as opposed to the Moser? Did you buy a Currie center section?

Thanks
 
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#13 ·
Originally posted by TJC:
I put a 9" in with the large drum brakes. NOT the hot ticket for a street car. It was very easy to lock the rear up on slippery surfaces, and in the rain it was crazy. Disks would be easier to regulate.
Did you have an adjustable proportioning valve?

Whittaker: I just went through this with my Nova. I contacted Currie, Moser and Strange. Currie was the most exspensive at $2773 +(they wanted $330 shipped to the house). Moser was $2700 for the same exact rear end + ($153 shipped to the house). Strange was $2550 but the parts weren't as good as the other two.

Currie and Strange both had a 4 week wait from order so I wouldn't have recieved it tell late March. I chose Moser. Ordered it last Wed the 16th and I received the entire thing yesterday :D . 2 days to build and 4 days to ship. I saved $250 over Currie and got it 4 weeks earlier.
 
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#14 ·
Proportioning valve wouldn't have done anything. The braking surface is just to large. Just like the brakes on a one ton pickup when it's empty. I'm talking about very light application of the brakes that would instantly lock up the rear end.
 
#15 ·
Whittaker,

a cheap disc option would be to use the large bearing ford housing ends that accept chevy disc brake brackets. i believe moser has these. then you can install 93-97 camaro rear discs or 98+ camaro rear discs, both with pbr calipers.
check out this site for info on the 93-97 swap.
93-97 rear disc swap

someone did a write up on the 98+ swap but i cant find it right now. i'm goin to do this swap before spring. i have it printed out at home so if youre interested i could fax it to you.

also, a search over at camaros.net should turn up a lot of info on these swaps....

good luck
 
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#16 ·
We went the 95-01 Explorer disc brake setup on my Son's car, the car isn't done yet but the parts were gathered from a local salvage yard for only $150. Not a bad price for a direct bolt on setup with 11" discs and emergency brake setup. The new Aftermarket replacement rotors for this setup only set us back $17 each. And all the parts for servicing this setup will be available at any parts store for many years not like an aftermarket deal like Bear, etc where you'd need to order the parts.
 
#17 ·
Did you re-drill the rotors and such?

Also on the Camaro brakes will they fit behind a 15" wheel?

I'm really leaning towards Moser they are closer and a dealer I know said he could save me a few $$$. The stock Chevy drums might be OK but if I'm going to swap I might as well go to discs to match the front 12" rotors anyway. My other car has 70-80ish Camaro rear discs but the Car doesn't work yet and I'm hoping the Lokar E-brake kit works on it. I have another set of those calipers but no other backing plates for them.
 
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