A buddy of mine is building this 32 Plymouth three window. he's putting this 1957 392 hemi in it. After pulling the car apart, he couldn't figure out what the rear axle was. Can the HAMB help him id it? Here are some pics. Thanks for the help!!
It's a mopar rear axle. I don't know how far back they used that style companion (pinion) flange, but it was up through the late 50's for sure. The driveshaft has a "pot type" u-joint, which is quite unconventional looking, but is a stamped steel housing with the driveshaft sticking into it with a crosspin, and it provides both lengthwise movement and U-joint angle allowance and the end of it is a flange fitting that bolts to what you see on this rear end. This unit could be from any Plymouth, Dodge, DeSoto from at least the 40's (maybe 30's) thru the mid 50's. Ray
Yup that's an Mopar 8 3/4 with a trunion style universal joint, probably late 50's early 60's. Very cool car and I hope it stays all mopar!! Please ask him to start a build thread so we mopar lovers can follow along from home....
I'll agree it's an 8.75. Has to be older than '66 because the flange style was dropped after '65. What is the case number on it?
It looks like an 8 3/4, but it isn't. The ring gear is actually a bit smaller, I can't remember the number offhand. Not sure when the popular muscle car styled 8 3/4 came out, but it was late 50s or early 60's. That could quite possibly be the original rearend for that car!
looks like what was in that 39 plymouth we used to have. Look at the numbers on it...they're probably hiding under a lot of grease...if you care. You'll want to swap in a newer rearend, most likely also when asking for ID help, you might want to include pics of the whole rearend, including the brakes, there might be more clues
The case number would help a lot as far as year ID. The 8.75 was introduced in 1957. The last 3 case numbers could be 741 (or 657),742 (or 985),489 (or 488), each corresponding to a different pinion stem size. The numbers in parenthesis are the same pinion stem size, but different years.
Thanks for the info, Dave is going to clean the grease off and get me the numbers. I will post them along with some pics of the brakes.
Another thing to look at, which is tough to see, is if the hubs on the rear are pressed on (like a Ford banjo rear) or if the studs are part of the axle...I have a '32 PLymouth axle, and they are tapered fit like the older Ford.
That rearend looks like the stock rearend I took out from under from my '48 Plymouth coupe. The rest of the car looks to be in great shape. To be Mopar engined? Just say no to uncle GM or his Blue cousin!
To be Mopar engined? Just say no to uncle GM or his Blue cousin! Hell yeah all MOPAR!! Thats what the hemi is for!
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