rear end choice

Posted By: ken65

rear end choice - 08/17/09 03:45 PM

i have a 1950 plymouth business coupe. i want to update the rear end. what is the best fit for it? an a-body 8 3/4? i can't afford to spend big money on a custom fit 9 inch or dana. what has anyone else used?

Posted By: John_Kunkel

Re: rear end choice - 08/17/09 06:57 PM

Measure the spring centers and the overall width from drum-to-drum and compare the specs to those in the archives.

http://www.moparts.org/Tech/Archive/axle/16.html

Posted By: rabid scott

Re: rear end choice - 08/17/09 11:42 PM

I used a 1969 Fury III under mine....

Posted By: RodStRace

Re: rear end choice - 08/18/09 12:09 AM

I have an 8.75 from a '69 Coronet 440 wagon under my '40. Width was fine, spring perches had to be changed for the old springs, since they are narrower. You also want to get the angle right, mine need to be redone.

Attached picture 5423670-40reardisc.JPG

Posted By: plmczy

Re: rear end choice - 08/18/09 12:14 AM

I'm using an 8 1/4 out of a 79 chrysler LeBaron in my 40. I was going to use a 8 3/4 rear out of a 70 Barracuda Gran Coupe but couldn't afford what people were asking for a center section as all I have is the housing and the axles.

Posted By: 36PLYM

Re: rear end choice - 08/18/09 01:08 AM

Quote:

I have an 8.75 from a '69 Coronet 440 wagon under my '40. Width was fine, spring perches had to be changed for the old springs, since they are narrower. You also want to get the angle right, mine need to be redone.

Used 68 Coronet rear end under the 36, no changes needed!

Posted By: RodStRace

Re: rear end choice - 08/19/09 01:11 AM

Something that may be a bit easier to find the local yards is a Cherokee axle. They are supposed to be good too. Make sure you bring your tape measure!

Posted By: bohmer2

Re: rear end choice - 08/19/09 03:35 PM

Quote:

Something that may be a bit easier to find the local yards is a Cherokee axle. They are supposed to be good too. Make sure you bring your tape measure!

Cherokee axle also gives the option of disc brake rear with e-brake.

And although not mopar the Ford 8.8 is another option as it can be found under everything from mustangs to Explorers at various widths.

Posted By: fstfish66

Re: rear end choice - 08/20/09 12:52 AM

currently putting a 8.8 out of a lincoln mark,,rear discs fits perfect in a 48 dodge

Posted By: Waynes48

Re: rear end choice - 08/20/09 01:12 AM

Using a 68 Roadrunner 8 3/4 rear in my 48 Plymouth P15. Width was pretty close...just had to relocate spring perches, and fabricate new spring plates because the axle tube diameter is larger, and the old ones would not work. Just need to figure out the proper pinion angle prior to welding the spring perches to the axle tubes.