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Dusted
 Post subject: Brake question 4 to 4.5
PostPosted: Wed Jan 24, 2007 11:29 pm 
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2 BBL ''SuperSix''

Joined: Mon Jan 22, 2007 5:30 am
Posts: 11
Car Model:
I am swpping the rear end in my duster. I currently have a 4" bolt pattern and will be going to a 4.5" bolt pattern.

My question is what do I need to buy new to swap the brakes over. Can I use the backing plate ETC and just buy a 4.5" bolt pattern drum?

Thanks
-Cory
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dakight
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PostPosted: Thu Jan 25, 2007 3:37 am 
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Supercharged
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Joined: Mon Sep 26, 2005 5:09 pm
Posts: 2946
Location: Gilbert, Arizona
Car Model: 1962 Plymouth Valiant Signet
There's a lot missing information in your question. Did the rear come with 4.5" bolt pattern and you want to swap the fronts to match? Did the rear come with a 4" pattern and you want to upgrade it? What is the year of your car and what kind of brakes does it currently have? 9" drum" 10" drum? Front disc? Details details, details...

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Dusted
 Post subject:
PostPosted: Thu Jan 25, 2007 3:51 am 
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2 BBL ''SuperSix''

Joined: Mon Jan 22, 2007 5:30 am
Posts: 11
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I'm just changing the rearend. It was originally a 4" bolt pattern. The new rearend is a 4.5". It's a 10" drum currently. 1970 Duster

The rearend I got is complete axle to axle however the axles are bare. Can i use my 4" backing plate etc on the new 4.5" rearend?
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slantzilla
 Post subject:
PostPosted: Thu Jan 25, 2007 10:24 am 
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Joined: Thu Oct 17, 2002 7:27 pm
Posts: 14491
Location: Park Forest, Illinoisy
Car Model: 68 Valiant
Probably not.

What rear did you buy? A LBP 7-1/4"? :shock:

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Dusted
 Post subject:
PostPosted: Thu Jan 25, 2007 2:12 pm 
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2 BBL ''SuperSix''

Joined: Mon Jan 22, 2007 5:30 am
Posts: 11
Car Model:
It's a narrowed 8 3/4 with 35 spline moser axles and 4.30s full spool
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slantzilla
 Post subject:
PostPosted: Thu Jan 25, 2007 8:18 pm 
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Joined: Thu Oct 17, 2002 7:27 pm
Posts: 14491
Location: Park Forest, Illinoisy
Car Model: 68 Valiant
What spacing did they put on the axle ends? Moser usually sets them for B-E body brakes. You will have to use brakes for the body style the axles are set for. :shock:

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Moljnir
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PostPosted: Mon Jan 29, 2007 5:45 pm 
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1 BBL (New)

Joined: Mon Jan 29, 2007 1:14 pm
Posts: 9
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For our cars there were two patterns, 4" and 4.5". You have to use the drums, backing plates and shoes as a unit. So, no, you cannot use your 4" backing plates. Good thing is that you can easily find 4.5' brake setups. As late as the 89 RWD cars still used what you need. In fact I have a C body 8 3/4 cut down to fit an A body with the 11" drum brake setup off a cop Diplomat.

Steve
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Dusted
 Post subject:
PostPosted: Mon Jan 29, 2007 7:34 pm 
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2 BBL ''SuperSix''

Joined: Mon Jan 22, 2007 5:30 am
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thank you
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sethmcneil
 Post subject:
PostPosted: Tue Jan 30, 2007 11:39 am 
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EFI Slant 6

Joined: Mon Oct 09, 2006 12:49 am
Posts: 267
Location: Burlington / West Seattle
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Quote:
In fact I have a C body 8 3/4 cut down to fit an A body with the 11" drum brake setup off a cop Diplomat.

Where?
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Moljnir
 Post subject:
PostPosted: Tue Jan 30, 2007 2:55 pm 
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1 BBL (New)

Joined: Mon Jan 29, 2007 1:14 pm
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In the back of my 65 Cuda.

I didn't mean to imply it was for sale or anything, merely that I had "been there".

Steve
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Kidd
 Post subject:
PostPosted: Thu Feb 15, 2007 5:10 pm 
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Turbo Slant 6

Joined: Wed Sep 13, 2006 7:41 am
Posts: 922
Location: Eureka
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I didnt look to see how old this post is, but I have a narrowed Moser rear under my 67 Barracuda. I bought new drums for a B body, and all was well.Infact, I bought all the brakes, and parts.....and the clips and used my 70 Road Runner as my reference. Wish you luck.
Kidd

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