Rear brake rotors, help identify
#1
Rear brake rotors, help identify
Hi to all, I have been reading every single post for some time now, but don't feel I have the knowledge to contribute, so mostly a looker, pretty new to tje XJS world and have an 88 amd a 89, both coupes.
I hope I can be clear on my question, on the 89 the rear brakes are sized and the rotor got damaged, so I am in the process of taking down the cage to replace calipers and rotors, I think the car has a Salisbury diff since it has the draining plug on the bottom. I have read the Salisbury and the Dana rotors are different, and looking at some vendors illustrations it looks like the Salisbury rotors have the two "acces" holes closer to the center, as opposed to the Dana rotors which have the two "acces" holes further from the center and go into the tapered part of tje rotor. I hope I am being clear.
I am ready to order the rotors, probably from RockAuto, but this morning I went to look at tje rotors on the 1989 XJS with a Salisbury differential and noticed it has what looks to be rotors for the Dana differential, is this possible? Can the Dana rotors be fitted to the Salisbury diff? I went to see the rotors on my 1988 XJS wich has the Dana diff (no drain plig at the bottom) and the rotors look exactly the same... Any idea if the previous owner might have screwed up amd thos is the reason for the brakes to be sized? This is a new to me car. I will try to post a pic of the rottors on the 1989 XJS with the Salisbury differential.
I hope I can be clear on my question, on the 89 the rear brakes are sized and the rotor got damaged, so I am in the process of taking down the cage to replace calipers and rotors, I think the car has a Salisbury diff since it has the draining plug on the bottom. I have read the Salisbury and the Dana rotors are different, and looking at some vendors illustrations it looks like the Salisbury rotors have the two "acces" holes closer to the center, as opposed to the Dana rotors which have the two "acces" holes further from the center and go into the tapered part of tje rotor. I hope I am being clear.
I am ready to order the rotors, probably from RockAuto, but this morning I went to look at tje rotors on the 1989 XJS with a Salisbury differential and noticed it has what looks to be rotors for the Dana differential, is this possible? Can the Dana rotors be fitted to the Salisbury diff? I went to see the rotors on my 1988 XJS wich has the Dana diff (no drain plig at the bottom) and the rotors look exactly the same... Any idea if the previous owner might have screwed up amd thos is the reason for the brakes to be sized? This is a new to me car. I will try to post a pic of the rottors on the 1989 XJS with the Salisbury differential.
#2
The following 4 users liked this post by jal1234:
Brake buster (07-25-2022),
Greg in France (07-24-2022),
Mkii250 (07-25-2022),
orangeblossom (07-25-2022)
#3
Either rotor will fit on either diff. However the Salisbury rotors on the Dana diff will make the caliper mounting bolts difficult or impossible to get to as they come in from the opposite side as the Salisbury diff.
If you have a drain plug, you definitely have a Salisbury diff.
Jon
If you have a drain plug, you definitely have a Salisbury diff.
Jon
TIA
Alfredo
The following 2 users liked this post by jal1234:
Greg in France (07-24-2022),
orangeblossom (07-25-2022)
#6
Alfredo,
Assume you have the Teves ABS on your "89" car, but not on what you call an "88"?
When you remove the calipers from the pads / remove the pads, absolutely do not push the pistons without first connecting a pipe to the bleed nipples and loosening the bleed nipples to let the fluid escape that way. It's really important that you don't push fluid back up the brake lines on a Teves ABS car.
Good luck
Paul
Assume you have the Teves ABS on your "89" car, but not on what you call an "88"?
When you remove the calipers from the pads / remove the pads, absolutely do not push the pistons without first connecting a pipe to the bleed nipples and loosening the bleed nipples to let the fluid escape that way. It's really important that you don't push fluid back up the brake lines on a Teves ABS car.
Good luck
Paul
The following 3 users liked this post by ptjs1:
#7
Alfredo,
Assume you have the Teves ABS on your "89" car, but not on what you call an "88"?
When you remove the calipers from the pads / remove the pads, absolutely do not push the pistons without first connecting a pipe to the bleed nipples and loosening the bleed nipples to let the fluid escape that way. It's really important that you don't push fluid back up the brake lines on a Teves ABS car.
Good luck
Paul
Assume you have the Teves ABS on your "89" car, but not on what you call an "88"?
When you remove the calipers from the pads / remove the pads, absolutely do not push the pistons without first connecting a pipe to the bleed nipples and loosening the bleed nipples to let the fluid escape that way. It's really important that you don't push fluid back up the brake lines on a Teves ABS car.
Good luck
Paul
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