Need help with rear disc conversion - Team Camaro Tech
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post #1 of 29 (permalink) Old Mar 29th, 10, 04:40 PM Thread Starter
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John
 
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Location: St. Louis, MO
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Need help with rear disc conversion

I decided to upgrade the rear brake on my 68 to disc brakes. I went with the rear disc conversion kit from Right Stuff since the previous owner of my car used their kit for the front brakes and I've been pretty happy with them.

The kit is advertised as a simple bolt on conversion.... however, I am going to need your help. For example, it says in step 2..


2) Remove the old Drum Brakes. (there are two options here.)
  1. "c" clip axels.
  2. Drop Out Axles
It essentially says to pull out the axles and remove the drum brakes. I don't know which type I have OR how to go about doing this.... Does anyone have a good reference guide that's available online (which photos) that can walk me through the conversion process? I've included a pic of my 10 bolt rear end if it is any help....

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post #2 of 29 (permalink) Old Mar 29th, 10, 04:48 PM
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Steiner
 
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Re: Need help with rear disc conversion

You have c-clip axles.

First, put the rear in the air on jack stands. Remove the tires and brake drums. Pop the rear end cover off and drain the fluid. In the middle of the differential, you will see a round bar going through between where the ends of the two axles enter. Rotate until you find the small bolt going sideways through it. Loosen it and pull it back far enough so the round retainer post slides. DO NOT slide it all the way out and DO NOT rotate either axle.

With the round post pushed back, you can now push each axle in slightly and remove the C clip by sliding it out. Then you can pull each axle. The brake kit comes with a spacer that replaces the drum backing plate

With the axles out, you will see four bolts holding the drum backing plates to the axle flanges. Remove those and pull off the backing pates and shoe assemblies.

Slide the included spacer onto the axle and reinsert the axle opposite to the way you pulled it out. Reinstall the C clips and push the post back down and retighten the retaining bolt.

Once you get a look at it, it'll make sense.

'69 Camaro
Dart 400-AFR 195-224/224 HR-Powerjection III TB with F.A.S.T. Sportsman XFI
TKO 600-Moser 3.42-Detroit Truetrac
500hp/538lbft

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'69 Camaro Beater-SFT 327-M20-Moser 4.10-sold
'02 Z/28 vert-stock-sold and totaled
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post #3 of 29 (permalink) Old Mar 29th, 10, 05:08 PM Thread Starter
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John
 
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Re: Need help with rear disc conversion

Thanks, I found a video on YouTube on how to remove the axle by removing the c clips... Doesn't seem to difficult, however, I'm a bit hesitant because the video I saw mentioned that the bolt holding the pin in breaks off about 20% of the time requiring it to be drilled out.... If thats the case, I will be in a heap of trouble.......
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post #4 of 29 (permalink) Old Mar 29th, 10, 05:19 PM
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Scott
 
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Re: Need help with rear disc conversion

I have never broken the bolt. Don't forget to refill the differential.

68 302 M20 - 85 IROC Z
The older I get the faster I was.
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post #5 of 29 (permalink) Old Mar 29th, 10, 05:20 PM
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Steiner
 
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Re: Need help with rear disc conversion

If it breaks just buy a 12 bolt.

If you're worried about it, use a propane torch to heat the area around the bolt a little. Sometimes people put red Loctite on it which requires heat to remove.

'69 Camaro
Dart 400-AFR 195-224/224 HR-Powerjection III TB with F.A.S.T. Sportsman XFI
TKO 600-Moser 3.42-Detroit Truetrac
500hp/538lbft

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'69 Camaro Beater-SFT 327-M20-Moser 4.10-sold
'02 Z/28 vert-stock-sold and totaled
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post #6 of 29 (permalink) Old Mar 30th, 10, 08:30 AM Thread Starter
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John
 
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Re: Need help with rear disc conversion

Quote:
Originally Posted by Steiner View Post
If it breaks just buy a 12 bolt.

If you're worried about it, use a propane torch to heat the area around the bolt a little. Sometimes people put red Loctite on it which requires heat to remove.
this may be a silly question, but I thought that the fluid was flamable....?
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post #7 of 29 (permalink) Old Mar 30th, 10, 08:57 AM
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Steiner
 
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Re: Need help with rear disc conversion

Quote:
Originally Posted by johnnymac View Post
this may be a silly question, but I thought that the fluid was flamable....?
The flash point of gear oil is higher than the little bit of heat you'd need. No reason to worry about that until you actually try removing the bolt.

'69 Camaro
Dart 400-AFR 195-224/224 HR-Powerjection III TB with F.A.S.T. Sportsman XFI
TKO 600-Moser 3.42-Detroit Truetrac
500hp/538lbft

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post #8 of 29 (permalink) Old Mar 30th, 10, 09:00 AM Thread Starter
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John
 
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Re: Need help with rear disc conversion

Quote:
Originally Posted by Steiner View Post
The flash point of gear oil is higher than the little bit of heat you'd need. No reason to worry about that until you actually try removing the bolt.
Thanks for your help, so should I just try removing the bolt first or go ahead and apply some heat?
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post #9 of 29 (permalink) Old Mar 30th, 10, 09:46 AM
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Rich
 
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Re: Need help with rear disc conversion

Quote:
Originally Posted by scblucam View Post
I have never broken the bolt. Don't forget to refill the differential.
you haven't done enough of them yet

69 R/S Z/28 302 X33 D80 late 09C
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post #10 of 29 (permalink) Old Mar 30th, 10, 10:25 AM Thread Starter
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John
 
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Re: Need help with rear disc conversion

Quote:
Originally Posted by zman1969 View Post
you haven't done enough of them yet
I'm hoping that it isn't seized in there...the rear end was rebuilt not to long ago.... we will see though.
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post #11 of 29 (permalink) Old Apr 1st, 10, 09:39 AM
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Mike
 
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Re: Need help with rear disc conversion

When putting the axles back in dont turn the hubs anymore than you absolutely have to - there are thrust washers in the gears that will fall out and are a bitch to put back in

________________________________
Mike
1967 RS 460 BB, TKO 600, 3.42 12 Bolt posi
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post #12 of 29 (permalink) Old Apr 1st, 10, 12:23 PM
 
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Re: Need help with rear disc conversion

Another hint. You may need to push the axle in slightly in order to remove the C clip. No, don't heat the bolt, just use a good 6 point wrench to loosen the bolt.
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post #13 of 29 (permalink) Old Apr 1st, 10, 04:21 PM Thread Starter
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John
 
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Re: Need help with rear disc conversion

Thanks guys! I found a friend of a friend who is a mechanic is going to help me... I can't wait to get started on Saturday... Hopefully it all goes well as my car is registered for the St. Louis Easter Sunday car show. :-)
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post #14 of 29 (permalink) Old Apr 2nd, 10, 08:22 AM Thread Starter
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John
 
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Re: Need help with rear disc conversion

Does anyone know how much gear oil I should get and what kind is recommended? Thank you so much!
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post #15 of 29 (permalink) Old Apr 2nd, 10, 10:37 AM
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Re: Need help with rear disc conversion

Quote:
Originally Posted by johnnymac View Post
Does anyone know how much gear oil I should get and what kind is recommended? Thank you so much!
Get 3 qts just to be safe , you will probably use a little over two. If you have a posi, don't forget the additive. This is also a good time to replace axle seals and take a peek at your axle bearing rollers.

I did the same conversion with Right Stuff kit from Matts. I went a step further and ordered the rotor backing plates. They fit super, sure complements the kit.

You probaly got the kit with e-brake cables, I did and they fit like a glove. Remember you adjust your disc pad clearances with the equalizer bolt on the intermediate cable.
It may pay you the time to bleed the rear calipers off the right rotor (place a block of wood between pads) or tilt the caliper back enought to allow all air to come to top. Its a pain but it's the only way to get all the air out .

Clean up all pad surfaces with brake kleen. Smile when you stop.

Don
TC # 349
Zdld17:69 Z/RS,306, NOR141111, 9N554XXX, 12A, X3G, 59/59,723, AFR 195,CCC282/290HR, TKO 600, BU1122B1E Owner since Dec 1968

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