Gear decipher
Thread Starter
Drifting
Joined: Jul 2009
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From: Ashland PA
2021 C4 of the Year - Modified Finalist
Gear decipher
I picked up a Dana 36 case at Carlisle and they have a set of richmond gears in it, the numbers on the gears are 82 0692-1 F 01 8620. I was told they are 3:54's and counting the turns comes out to about that. He also gave me the ring and pinion that came out of it the numbers on it are 37355380 GM 11 37 6 75. I am trying to ID them the richmond site list a different part number. Any Thoughts.
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I picked up a Dana 36 case at Carlisle and they have a set of richmond gears in it, the numbers on the gears are 82 0692-1 F 01 8620. I was told they are 3:54's and counting the turns comes out to about that. He also gave me the ring and pinion that came out of it the numbers on it are 37355380 GM 11 37 6 75. I am trying to ID them the richmond site list a different part number. Any Thoughts.
The D36 that you bought is a 3.75 with the kit # of 49-0110-1, 82-0692-1 is the ring gear and 82-0693-1 is the pinion if you could read it. There should be 45 teeth on the ring gear and 12 on the pinion. It ain't no 3.54. Check the tooth counts and do the math. Ring gear/pinion = ratio.
I believe the ring gear number on the gear set is 3735390 and that would make it a 3.36 for a '63 or '64 by application. Is the pinion 11 tooth? Is there a number on it? Maybe 3819186 for '63 - '64. If the pinion is 3885942 its for a '65 - '79.
Last edited by WVZR-1; Aug 23, 2014 at 06:42 PM.
Team Owner
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Thread Starter
Drifting
Joined: Jul 2009
Posts: 1,257
Likes: 98
From: Ashland PA
2021 C4 of the Year - Modified Finalist
Thread Starter
Drifting
Joined: Jul 2009
Posts: 1,257
Likes: 98
From: Ashland PA
2021 C4 of the Year - Modified Finalist
I'd say the gear set is for a 3.36 rear and it's NOT for a D36 Corvette. There's a couple possible applications and I believe if you posted more accurate information off of the ring gear I could ID it. Post a picture of the stuff you bought.
The D36 that you bought is a 3.75 with the kit # of 49-0110-1, 82-0692-1 is the ring gear and 82-0693-1 is the pinion if you could read it. There should be 45 teeth on the ring gear and 12 on the pinion. It ain't no 3.54. Check the tooth counts and do the math. Ring gear/pinion = ratio.
I believe the ring gear number on the gear set is 3735390 and that would make it a 3.36 for a '63 or '64 by application. Is the pinion 11 tooth? Is there a number on it? Maybe 3819186 for '63 - '64. If the pinion is 3885942 its for a '65 - '79.
The D36 that you bought is a 3.75 with the kit # of 49-0110-1, 82-0692-1 is the ring gear and 82-0693-1 is the pinion if you could read it. There should be 45 teeth on the ring gear and 12 on the pinion. It ain't no 3.54. Check the tooth counts and do the math. Ring gear/pinion = ratio.
I believe the ring gear number on the gear set is 3735390 and that would make it a 3.36 for a '63 or '64 by application. Is the pinion 11 tooth? Is there a number on it? Maybe 3819186 for '63 - '64. If the pinion is 3885942 its for a '65 - '79.
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Thread Starter
Drifting
Joined: Jul 2009
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From: Ashland PA
2021 C4 of the Year - Modified Finalist
I replaced all the bearings and seals in my diff thats in my 90 C4 over the winter at the time I was laid off and would have liked to replace the ring and pinion but did not want to spend any more money on it than I had to. The gears have 176K + on them they are 2:59's I was thinking of going to 3:07's but then the way I understand it I will need a different center section that the ring bolts to. So now I will have to determine what center section I have in the case with the bad richmond gears in it.
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I replaced all the bearings and seals in my diff thats in my 90 C4 over the winter at the time I was laid off and would have liked to replace the ring and pinion but did not want to spend any more money on it than I had to. The gears have 176K + on them they are 2:59's I was thinking of going to 3:07's but then the way I understand it I will need a different center section that the ring bolts to. So now I will have to determine what center section I have in the case with the bad richmond gears in it.
The four holes where the camber brackets bolt to are drilled for either 10mm or 12mm hardware. Which are yours?
Rotate the case to a point where you may be able to read the casting information on it. Post that and maybe the case can be identified more closely.
Thread Starter
Drifting
Joined: Jul 2009
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From: Ashland PA
2021 C4 of the Year - Modified Finalist
OK the holes for the camber bracket measure 11.30 mm with a digital caliper. On the carrier the numbers are stamped 72609 X 6 25 85 and on the bottom of the aluminum case along the gasket surface is stamped OD208AW. Also thanks for all your help.
Last edited by eutu1984; Aug 26, 2014 at 05:16 PM. Reason: spelling
Thread Starter
Drifting
Joined: Jul 2009
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From: Ashland PA
2021 C4 of the Year - Modified Finalist
I emailed Richmond gear and they said the gears I have are 2:75's and they are for the series 2 carrier. The tallest gear they offer is the 3:54 and they dont make a 3:07.
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Richmond makes 2 gear sets the "TALLEST" is 3.54 and the "SHORTEST" is the 3.75 that you have. Tall is smaller numerical and short is larger numerical.
Thread Starter
Drifting
Joined: Jul 2009
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From: Ashland PA
2021 C4 of the Year - Modified Finalist
The reason I emailed Richmond was to confirm that it was a series 2 carrier so I could decide what I was going to do with it. I will probably just sit it on the shelf for now. The other GM gears that I have I will most likely give to somebody if they can yous them.