Someone I know bought a 78 with BIG rust holes in the backing plates. And big chunks of the brake drums gone due to extreme rust. I have the four off my 73. Bob Dunahugh
r Are the four rear backing plates, and brake drums interchangeable between 73, and 78?
- Thread starter Bob Dunahugh
- Start date
> Someone I know bought a 78 with BIG rust holes in the backing plates. And big chunks of the brake drums gone due to extreme rust. I have the four
> off my 73. Bob Dunahugh
Bob,
You are sure to love this answer.....
Maybe.
There was a recall. GM sent dealers loaded backing plates to put on 73, 74, and some 75 coaches (as nearly as I have been able to determine).
This was along with a rear spindle upgrade.
So, if that 73 got the upgrade, then they should be interchangeable.
Someplace in the files of GMC data is a discussion of this upgrade. I believe it can be identified by looking at the external face of the brake
drums.
Matt
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit
> off my 73. Bob Dunahugh
Bob,
You are sure to love this answer.....
Maybe.
There was a recall. GM sent dealers loaded backing plates to put on 73, 74, and some 75 coaches (as nearly as I have been able to determine).
This was along with a rear spindle upgrade.
So, if that 73 got the upgrade, then they should be interchangeable.
Someplace in the files of GMC data is a discussion of this upgrade. I believe it can be identified by looking at the external face of the brake
drums.
Matt
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit
