rear end

[tinlizzy]

I have recently acquired a 1948 plymouth rear end that was in a D24 convertible coupe. It was believed to be a special edition hi performance car of which only about 200 remain in existance. I bought the rear end with hopes to use it in my dodge pickup by swapping out the pumpkin. There was no tag to id the ratio. The only numbers I could find are as follows.

767-N10

1141544-1

DP

CD

There is also two flat flanges one on the top on one on the bottom with either a 9 or a 6 depending how you look at it. There is also a flat spot on what would be the passenger side if it were in the car. It has a number that looks like 39 but is corroded and hard to read.

Any idea what the ratio would be? Currently unble to turn the rear end as one backing plate is bent over locking drum in place.

Thanks for your insite.

Lee

[Young Ed]

If you pull it apart the ratio is stamped on the ring gear. That 39 number could very easily mean a 3.9 ratio

[Normspeed]

Lee, sometimes the ratio is stamped into the top of the case and the area gets pretty cruddy and hard to see. Here's a 50 Plymouth 3.73 rear, showing the location of the ratio stamp. That would be on the top when the rear end is installed. You can see how much crud I had to scrape through to find the numbers.

[BobT-47P15]

Wonder why a Plymouth rear end was in a Dodge convertible.

[tinlizzy]

I took my wire brush to the top of the rear end case and sure enuff there was a 3/9 so I guess I got a 3.90 ratio. Was hoping for a 3.73 or less but use what ya got. Stuff is scarce around these parts and just lucky to find this one, it will be better than the lower geared truck rear end but not by much.

As far as to a plymouth in a dodge? Who knows, I think the car is a plymouth as by looks of car but I didn't want to say anything as to a D24 too new to this to start an argument. I think the drums are different on the truck verses the car rear end and if they are I will have a couple to pass on if someone needs them.

Thanks for the help.

Bye the way how do you post these pictures?

Lee

[Plymouthy Adams]

the Concorde (111 wheelbase Plymouth) would be your best bet at finding a 3.73 or later 54 Plymouth with automatic...your larger Chrysler tip-toe 4's could be a good source for 3.54...OD cars got 4.11 otherwise optional in hilly country...the 3.9 was very much the installed gear in most larger wheelbase applications.

[austinsailor]

If one side won't turn, just count the other side's turns, divide in half. No big deal.

[Young Ed]

it will be better than the lower geared truck rear end but not by much.

. I think the drums are different on the truck verses the car rear end and if they are I will have a couple to pass on if someone needs them.

Lee

I've got a 3.9 in my truck and it cruises nicely with 16s. I don't know what kind of truck you have but mine uses the same drums as cars.

[tinlizzy]

thanks Young Ed. I have a 48 pilot house and still collecting parts to start a redo. Hood and right front fender off, truck seat out, engine partially disassembled and it is frozen from leaks around spark plugs. Another engine in the wings. Just got dubs on a 48 panel truck with spitfire engine with only 3000 miles on a rebuild real cheap too. My wife will have a hissy fit but she'll get over it, I hope. Hope the deal goes through, body is pretty rough but parts galore.

Lee