posted 11-15-2011 10:27 AM                  

This is the supplier I use to use for all my gear work.

posted 11-15-2011 10:31 AM                  

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Originally posted by catfish:
if your talking about the prowler,it does not have a ring and pinion.it has 2 gears and a chain.,0r are you talking about a 33 plymouth.

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Jan, he is looking for parts on a 1933 , not the Prowler

posted 11-15-2011 08:02 PM                  

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Originally posted by Don:
Can anyone come up with new ring and pinion set for Plymouth 8.75 741 case with 3.91 gear.

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Don

there are no 391 ring and pinion for a 741 case that i could find new. you might get a used set, but would be better to get a 742 or 489 case then you can get whatever gear ratio you want.

Randy's had only 355 or "373" for a 741 case (what i have in the Dart)I had a factory set of 3.91 but had some pitting on the teeth, so we changed them to 3.73. I wanted to keep the gears but before I got back to the garage they thru them out.

You should have no problem finding the better case

I have 3 cases and all are 741

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Larry & Sue Mayes

posted 11-16-2011 04:34 PM                  

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Originally posted by Don:
Larry,,
I hate to change gear as this performs very well with the Dodge 518 trans with OD. I am getting 21,22 mpg. The problem I am having is a heave whine on excelration.It will be most expensive to change over to a 742. I guess I could try to reset pinion.

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my 373 whine like crazy, I hate it too. Thought about putting the 3.23 back in

The 741 case has a smaller pinion bearing dia. (I think)

If they are aftermarket gears you may never get the whine out of them. Had a long discussion with Rick Allison from A&A transmissions (long time drag racer) he said many of the aftermarket gears whine and there is nothing you can do to help them

IMO, would find a guy in the area that is good with rear ends and see what they think before you go any farther

Good Luck