What Rear Drum Brake Kits will work with Monza?

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What Rear Drum Brake Kits will work with Monza?

Postby fas141 » Sun Mar 27, 2022 6:21 pm

I need to rebuild my whole rear drum brake set up on my 77 Monza Mirage. I am upgrading to 5-lug axles. Will the G-body 9 1/2" drum backing plate, shoes and drum work? Seems easier to just buy the whole set up loaded and ready to go.
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Re: What Rear Drum Brake Kits will work with Monza?

Postby cosvega76 » Mon Mar 28, 2022 8:19 am

I'm not sure about the backing plate, as the axle mounting bolt pattern may be different, and possibly a different offset. You already have the correct brakes, and it looks like the A- or G-body (and Camaro) 9.5" drums are the correct depth, compared to the Monza, according to the prints. The worst I've heard is that you may have to grind a little off the outer ring to clear the groove in the backing plate.


Chuck
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Re: What Rear Drum Brake Kits will work with Monza?

Postby cjbiagi » Mon Mar 28, 2022 4:56 pm

As Chuck mentioned, you already have the same brake setup, all you need are 5 lug drums. I used S10 drums, you want to make sure the center pilot hole is the same as your axle. If you are using S10 axles then just use S10 drums. In reality they may all be the same as A & G body 9 1/2" brakes.
Clyde.........75 Monza 2+2
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Re: What Rear Drum Brake Kits will work with Monza?

Postby fas141 » Tue Mar 29, 2022 7:20 am

Thanks guys, I guess I should have mentioned my Monza back plates are rusty and I'm probably not going to use them. Good tip about the drums as I am using S10 axles.

Also, are there any vendors that sell the the axle brake lines? I suppose I can wing it with something else but would prefer something that looks stock.

Thanks!
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Re: What Rear Drum Brake Kits will work with Monza?

Postby cjbiagi » Tue Mar 29, 2022 8:49 am

Clyde.........75 Monza 2+2
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Re: What Rear Drum Brake Kits will work with Monza?

Postby monzaaddict » Tue Mar 29, 2022 9:46 pm

go to rock auto and look up mid 80s s10 rear drums for other applications. You need s10 drums and26 spline axles for a stock monza 7.5 rear. the backing plates and all hardware is stock 76-80 monza. you might need a shim between axle and drum to prevent rubbing. jdrace.com may offer the shim. have your backing plates glass beaded or find used if they are bad. no other backing plate works unless you want to add about 1/2 to each side and get custom axles.


Buyer's Guide : ACDELCO 18B80 Drum
Results may be incomplete due to size of result set
BUICK CENTURY 1973-1981
BUICK ELECTRA 1977-1985
BUICK ESTATE WAGON 1977-1983
BUICK GRAN SPORT 1965
BUICK GS 400 1968
BUICK LESABRE 1977-1984
BUICK REGAL 1973-1987
BUICK RIVIERA 1977-1985
BUICK SKYLARK 1965-1979
CADILLAC BROUGHAM 1988-1989
CHEVROLET CAMARO 1975-1992
CHEVROLET CAPRICE 1977-1990
CHEVROLET CHEVELLE 1973
CHEVROLET EL CAMINO 1973-1986
CHEVROLET IMPALA 1977-1985
CHEVROLET LAGUNA 1973
CHEVROLET LLV 1987
CHEVROLET MALIBU 1973-1983
CHEVROLET MONTE CARLO 1970-1988
CHEVROLET NOVA 1975-1978
CHEVROLET S10 BLAZER 1983-1991
CHEVROLET S10 PICKUP 1982-1991
GMC CABALLERO 1978-1987
GMC S15 JIMMY 1984-1991
GMC S15 PICKUP 1982-1990
GMC SONOMA 1991
GMC SYCLONE 1991
OLDSMOBILE 98 1978-1980
OLDSMOBILE CUSTOM CRUISER 1977-1983
OLDSMOBILE CUTLASS 1967-1981
OLDSMOBILE CUTLASS CALAIS 1978-1984
OLDSMOBILE CUTLASS CIERA 1987
OLDSMOBILE CUTLASS CRUISER 1980-1983
OLDSMOBILE CUTLASS SALON 1978-1987
OLDSMOBILE CUTLASS SUPREME 1973-1988
OLDSMOBILE DELTA 88 1977-1983
OLDSMOBILE OMEGA 1975-1978
OLDSMOBILE TORONADO 1979-1982
PONTIAC BONNEVILLE 1978-1986
PONTIAC CATALINA 1977-1981
PONTIAC FIREBIRD 1970-1992
PONTIAC GRAND AM 1978-1980
PONTIAC GRAND LEMANS 1978-1981
PONTIAC GRAND PRIX 1973-1987
PONTIAC GRAND SAFARI 1978
PONTIAC LEMANS 1978-1981
PONTIAC PARISIENNE 1978-1985
PONTIAC PHOENIX 1977
PONTIAC VENTURA 1977
Please refer to catalog for application details.
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Re: What Rear Drum Brake Kits will work with Monza?

Postby fas141 » Wed Mar 30, 2022 4:16 pm

Thanks guys for your input.
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