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AAJ brakes - Opinions?


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#1 Barsteel

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Posted 24 November 2013 - 05:21 PM

Hello!

 

This is my first post.  Last week, I was lucky enough to work a trade on Craigs List for a 52 Plymouth coupe with 29,000 original miles and the most rust free body I've ever seen on a car of that age.  It does need some love, interior, brakes, gas tank, etc, but it's all there except for the hubcaps.  The plan is to get it to start, run, and stop reliably, then upgrade the transmission and/or rear end so that it can cruise on the highway.

 

First job is a 12V conversion, then the brakes.  With my other old cars (mostly Chevys), I'd swap out the rear for more favorable gearing and better bendix brakes, and back the engine up with a T5.  For the Pllymouth, I plan on using Scarebird's conversion to get discs on the front, but I'm not sure as to what I should do for the rear.  I'm not sure because I found a company that makes disc conversions for '35 and up Chrysler cars, including my '52 Plymouth.  It's at www.tsmmfg.com.  If I can retain the original rear, convert it to discs, and swap in a T5 for the 3 speed, is there ANY reason I should NOT use the original rear?  My understanding is that it's got a 3.9 ratio, which will work well with the OD on a T5.  I have ZERO experience with Chrysler products from the 50s, so I don't know if there are any inherent weaknesses or drawbacks in the original rear end.

 

Are there?

 

I hope not, because if I can get away with a brake swap on the original axle and use a T5 to make the car highway-worthy, it will save me a ton of work.

 

Thanks in advance for your input.

 

Chris
Monroe, CT

 

 

 

 

 

 

 



#2 Barsteel

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Posted 24 November 2013 - 05:25 PM

Hello!

 

Posted this in error in the tech archives section...sorry 'bout that...noob mistake...Anyway...

 

This is my first post. Last week, I was lucky enough to work a trade on Craigs List for a 52 Plymouth coupe with 29,000 original miles and the most rust free body I've ever seen on a car of that age. It does need some love, interior, brakes, gas tank, etc, but it's all there except for the hubcaps. The plan is to get it to start, run, and stop reliably, then upgrade the transmission and/or rear end so that it can cruise on the highway.

 

First job is a 12V conversion, then the brakes. With my other old cars (mostly Chevys), I'd swap out the rear for more favorable gearing and better bendix brakes, and back the engine up with a T5. For the Pllymouth, I plan on using Scarebird's conversion to get discs on the front, but I'm not sure as to what I should do for the rear. I'm not sure because I found a company that makes disc conversions for '35 and up Chrysler cars, including my '52 Plymouth. It's at www.tsmmfg.com. If I can retain the original rear, convert it to discs, and swap in a T5 for the 3 speed, is there ANY reason I should NOT use the original rear? My understanding is that it's got a 3.9 ratio, which will work well with the OD on a T5. I have ZERO experience with Chrysler products from the 50s, so I don't know if there are any inherent weaknesses or drawbacks in the original rear end.

 

Are there?

 

I hope not, because if I can get away with a brake swap on the original axle and use a T5 to make the car highway-worthy, it will save me a ton of work.

 

Thanks in advance for your input.

 

Chris
Monroe, CT



#3 Don Coatney

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Posted 24 November 2013 - 05:34 PM

sorry bad information


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#4 Barsteel

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Posted 24 November 2013 - 05:45 PM

Don -

 

The disc conversion kit uses Caddy Eldorado calipers that allows you to have a parking brake.

 

Chris



#5 Plymouthy Adams

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Posted 24 November 2013 - 05:48 PM

and what a nightmare that system is...looked at one at the swap meet..had to laugh....

Political Correctness: A philosophical belief system bereft of common sense and logic, that supports and rewards ignorance and stupidity.


#6 Barsteel

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Posted 25 November 2013 - 04:11 AM

Adams -

 

Used the same type of kit on my Galaxie...works like a charm.

 

Chris



#7 Plymouthy Adams

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Posted 25 November 2013 - 05:01 AM

did not say it did not work..was only saying simplicity at its best it is not...as we all know we work with thing available and the fact that these are so plentiful in the junkyards says scores..personally with the advance made over the years I would look at a bit more modern shoe in the hat setup..

Edited by Plymouthy Adams, 25 November 2013 - 05:12 AM.

Political Correctness: A philosophical belief system bereft of common sense and logic, that supports and rewards ignorance and stupidity.


#8 Barsteel

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Posted 09 December 2013 - 05:10 PM

Hello!

 

I'm planning a disc brake upgrade to my '52 Plymouth coupe.  I'm going to keep the original rear end and convert it to disc brakes along with discs in the front and a dual pot MC.

 

I've done some digging, and found that several companies make the disc brake conversion kits, namely Scarebird (fronts), AAJ (front, rear, and MC), ECI (front and MC), and the Street Rod Manufacturing Company (front and rear).

 

I've heard a lot of good things about Scarebird, so I've decided to use their kit for the front discs.  For the MC, I've read here that the ECI kit requires some tweaking, and that the lines are difficult to route because the exit on the driver's side of the MC as used in the bracket.  AAJ offers a MC kit that appears to be well engineered, but has anyone here used their kit?  Any watch-outs for their MC kit, or anything else I should know about either one?

 

As far as the rears go, same questions about AAJ and Street Rod Manufacturing.  I used SRM's kit on my '64 Galaxie, and it works well...like most of these kits, it uses the early 80s Eldorado calipers so that you can have parking brakes.

 

Anyone have input on either of their kits for the rears?

 

Thanks...

 

Chris



#9 Jim Yergin

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Posted 09 December 2013 - 05:43 PM

Chris,
I installed the AAJ kits on both the front and rear of my '41 Plymouth and was pleased with both.
The rear uses the original brake drum hub so there is no parking brake other than what is at the rear of the transmission.
I have since replaced my rear end with one out of an Explorer and I am using the disc brakes that came with it.
If you would be interested in my AAJ rear brake parts plus the rear hubs just send me a PM.
Jim Yergin

#10 Barsteel

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Posted 09 December 2013 - 05:48 PM

Jim -

 

Thank you for input and the offer.

 

My understanding of AAJ brakes was that you could order them with a provision for rear parking brakes using Eldorado calipers.  Can I assume that your kit did not use those calipers?  Also, would you know if the rear end from a '41 is the same as a '52?

 

Again, thanks, as this is my first '50s Mopar.

 

Chris






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