Kiwibirdman Posted April 21, 2020 Share Posted April 21, 2020 I have been led to believe that commodore rear disc assemblies, caliper, disc, backing plate etc will bolt onto an HQ to HZ Salisbury diff. Does anyone know for sure? Quote Link to comment Share on other sites More sharing options...
vk327 Posted April 21, 2020 Share Posted April 21, 2020 can be done. need to change to the disc rear end axle bearing and seals they have a different seal width to accommodate the difference in backing plate thickness, bearings and seal kits from vk v8 sailsbury commodore should work 2 Quote Link to comment Share on other sites More sharing options...
johnny.race Posted April 21, 2020 Share Posted April 21, 2020 So the brake offset/backspace is the same on both diffs? Plus the backing plate bolt pattern on the Salisbury and BW are the same also? 1 Quote Link to comment Share on other sites More sharing options...
vk327 Posted April 21, 2020 Share Posted April 21, 2020 yeah the axle tube flange ends are the same on both sailsbury and borg warner diffs, just the thickness of the backing plate that affects the bearing/seal depth, from memory the axle flange offset is the same 1 Quote Link to comment Share on other sites More sharing options...
Kiwibirdman Posted April 21, 2020 Author Share Posted April 21, 2020 47 minutes ago, vk327 said: can be done. need to change to the disc rear end axle bearing and seals they have a different seal width to accommodate the difference in backing plate thickness, bearings and seal kits from vk v8 sailsbury commodore should work Thanks. Quote Link to comment Share on other sites More sharing options...
johnny.race Posted April 21, 2020 Share Posted April 21, 2020 From my experience fucking around with fitting different axles/disc brake combinations with Falcon based BW's, the seal height/thickness matters. The seals used in the Ford BW's come in 3 different thicknesses from what I have seen. Two of them are quite close to look at where as the 3rd one is noticeably thicker. Its a trap for players though, but you can tell if what you have fitted is the correct one by pushing and pulling on the axle flange in order to see if there is any backlash evident after its fitted. On a BW there should not be any due to it running tapered bearings. As well as providing a seal for the housing - they provide bearing pre-load. Same deal as a Set20 on a big bearing 9". Just saying. 2 Quote Link to comment Share on other sites More sharing options...
SOHC Posted April 21, 2020 Share Posted April 21, 2020 Master cylinder might need changing and or RPV removed from port 1 Quote Link to comment Share on other sites More sharing options...
Kiwibirdman Posted April 21, 2020 Author Share Posted April 21, 2020 Just now, SOHC said: Master cylinder might need changing and or RPV removed from port Already have a VZ commodore master cylinder so that isn't a problem. I was worried that there might have been issues with not having a RPV. Quote Link to comment Share on other sites More sharing options...
SOHC Posted April 22, 2020 Share Posted April 22, 2020 Might not need one with the master cylinder that high 1 Quote Link to comment Share on other sites More sharing options...
Kiwibirdman Posted April 22, 2020 Author Share Posted April 22, 2020 True. The more I think about it, spending $80 and having it all done in a couple of hours is looking much better than pulling the diff, replacing bearings and seals, changing the handbrake cable and lots of fucking around. 2 Quote Link to comment Share on other sites More sharing options...
SOHC Posted April 22, 2020 Share Posted April 22, 2020 I am told the disk brake hand brake calapers are shits of things to Quote Link to comment Share on other sites More sharing options...
Kiwibirdman Posted April 22, 2020 Author Share Posted April 22, 2020 The Holdens use a drum in the middle of the disc for the park brake. My Silverado has the same deal and it works really well. Quote Link to comment Share on other sites More sharing options...
johnny.race Posted April 22, 2020 Share Posted April 22, 2020 17 hours ago, SOHC said: I am told the disk brake hand brake calapers are shits of things to I believe that's one of those urban myths handed down, thrown about, passed on by hearsay, not from actual ownership. My 5c worth anyway. I've had/got the odd pair and some have suffered from sitting for long times out in the elements like anything would. Most of them still had function though. These are getting near 40yrs old now if you are talking BW. Go through them and keep them on a toy that lives in a shed and you'll have no problems. Fucked seals, old moisture laden DOT3 sitting in them and lack of use are what I reckon have given them a bad rep. Quote Link to comment Share on other sites More sharing options...
SOHC Posted April 23, 2020 Share Posted April 23, 2020 1 hour ago, johnny.race said: I believe that's one of those urban myths handed down, thrown about, passed on by hearsay, not from actual ownership. My 5c worth anyway. I've had/got the odd pair and some have suffered from sitting for long times out in the elements like anything would. Most of them still had function though. These are getting near 40yrs old now if you are talking BW. Go through them and keep them on a toy that lives in a shed and you'll have no problems. Fucked seals, old moisture laden DOT3 sitting in them and lack of use are what I reckon have given them a bad rep. I did a disk brake conversation on my v8 falcon and ended going back to drum, the ford 9” ones are definitely shitty Quote Link to comment Share on other sites More sharing options...
johnny.race Posted April 23, 2020 Share Posted April 23, 2020 The only factory 9" disc brakes I've seen are those ones that came on the Lincoln Versailles. Were the ones that you fitted that sort or something else, out of interest. Quote Link to comment Share on other sites More sharing options...
Kiwibirdman Posted April 23, 2020 Author Share Posted April 23, 2020 Flat mate of mine years ago had an XB Falcon van with disc brake diff. Apparently the diff came out of an LTD. Park brake, foot operated, was rubbish. Quote Link to comment Share on other sites More sharing options...
SOHC Posted April 23, 2020 Share Posted April 23, 2020 3 hours ago, johnny.race said: The only factory 9" disc brakes I've seen are those ones that came on the Lincoln Versailles. Were the ones that you fitted that sort or something else, out of interest. I got them from a wrecker in Auckland in 2004 I don’t know what they came off, I couldn’t get parts for them. Quote Link to comment Share on other sites More sharing options...
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