Brake Question

[67Survivor!]

My '64 Nova (see my avatar) has an 8 3/4" Mopar rear end. I think it's a 489 case. It's time for brakes (drum) and I have no idea what vehicle the rear end came from. Are all 489 case brake components the same?

 

[PurpleBeeper]

No. There are 2 different drum sizes (2-1/2” wide or 3” wide) and the parts are mostly different. The xxxx489 on the center section of the rear end wont tell you about the brakes. I’d suggest pull a drum and measure ID and width, then take some educated guesses at the auto parts store and match the parts up. Others will chime in. I’m no brake expert

 

[pnora]

Best to measure what you have. As said above there are different widths along with different diameters. so there are at least 4 size options.

 

[R413]

Measure and a photo for us. All the hardware changed between 69 and 70.

 

[mobileparts]

As others have pointed out , Brake Drum diameter ( likely
10 “ vs 11 “ ) and Brake Shoe Width ( likely 2 1/2 “ ) are the critical measurements…
A picture of the wheel ( all as is — mounted ) will tell me instantly what you have……
Craig….

 

[WileE]

Do this ^^ and call Craig, your problem will be solved.

 

[67Survivor!]

As others have pointed out , Brake Drum diameter ( likely
10 “ vs 11 “ ) and Brake Shoe Width ( likely 2 1/2 “ ) are the critical measurements…
A picture of the wheel ( all as is — mounted ) will tell me instantly what you have……
Craig….

 

[67Survivor!]

As others have pointed out , Brake Drum diameter ( likely
10 “ vs 11 “ ) and Brake Shoe Width ( likely 2 1/2 “ ) are the critical measurements…
A picture of the wheel ( all as is — mounted ) will tell me instantly what you have……
Craig….

 

[67Survivor!]

I'm going to change the bearings and seals as well.

 

[ckessel]

Looks like 11x2.5's. Many of the mid and full sized cars use those. I'm putting that stuff on my 67 Coronet wagon. I ordered up drums, shoes, cylinders, hardware for a 70 Coronet rear. Just so you have a starting point. I'm curious to see what axle bearing setup you have. Tapered Timken rollers, the best, or aftermarket Green units which are ball bearing and suck.

 

[67Survivor!]

Looks like 11x2.5's. Many of the mid and full sized cars use those. I'm putting that stuff on my 67 Coronet wagon. I ordered up drums, shoes, cylinders, hardware for a 70 Coronet rear. Just so you have a starting point. I'm curious to see what axle bearing setup you have. Tapered Timken rollers, the best, or aftermarket Green units which are ball bearing and suck.

They are Timken rollers.

 

[ckessel]

Excellent! Look like this setup with the adjusters?
for MOPAR D, A, B-truck Roller Rear Wheel Bearing Kit True Roller 8¾" W/ adj/ret | eBay
If so, read this.
Chrysler 8 3/4 Axle bearing and Seal R&R...A How To
Can't seem to find the adjusting procedure for you. Sure it's on the forum somewhere or another member will chime in. I can also take pics of it from my FSM tomorrow and post them here.

 

[67Survivor!]

Excellent! Look like this setup with the adjusters?
for MOPAR D, A, B-truck Roller Rear Wheel Bearing Kit True Roller 8¾" W/ adj/ret | eBay
If so, read this.
Chrysler 8 3/4 Axle bearing and Seal R&R...A How To
Can't seem to find the adjusting procedure for you. Sure it's on the forum somewhere or another member will chime in. I can also take pics of it from my FSM tomorrow and post them here.

 

[ckessel]

While I'm thinking of it, you'll need a dial indicator set and a dead blow hammer for the procedure.

 

[67Survivor!]

Looks just like that!
Thank you!

While I'm thinking of it, you'll need a dial indicator set and a dead blow hammer for the procedure.

Got 'em both.
Thanks again!

 

[ckessel]

I have to order that bearing/retainer/adjuster pack too for my wagon. The PO put Greens on.

 

[ckessel]

Here you go. Before installing the new bearings, pack them just like the fronts. Same grease even. They are not oil bath, unless the inner seal has an issue. If you have not found Timkens, set 7, try your stores. Also Craig from Mobile Parts is a possibility, along with Rock Auto and Amazon. Bearing supply houses too. Anything other than Timken is junk.

 

[67Survivor!]

Here you go. Before installing the new bearings, pack them just like the fronts. Same grease even. They are not oil bath, unless the inner seal has an issue. If you have not found Timkens, set 7, try your stores. Also Craig from Mobile Parts is a possibility, along with Rock Auto and Amazon. Bearing supply houses too. Anything other than Timken is junk.

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Will do!