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1970-96 GM 10 Bolt 8 1/2 Inch Ring and Pinion

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Specs
Sold in Quantity:
Set
Shaft Diameter:
1.63
Spline Count:
30
Ratio:
-
Garage Sale:
No
Outside Diameter:
8.50
Notes
Inside thickness of ring gear is 1.7"
1970-96 GM 10 Bolt 8 1/2 Inch Ring and Pinion

Click image to enlarge

Details

Reviews

Q & A

What's in the Box

Many ratios to choose from.

  • 8.50" diameter ring gear
  • 1.625" diameter pinion
  • 10 ring gear bolts
  • 10 cover bolts
  • 30 pinion splines
  • Uses LH thread ring gear bolts - 7/16"-20

Note: When replacing a stock 2.56 (or numerically lower) ratio, the carrier must also be replaced with a 2.73 or higher ratio's carrier to compensate for the difference in ring gear thickness.

Application

  • Buick Full Size 1977-1996
  • Buick Electra 1976-1978
  • Regal 1973-1977
  • Century 1973-1977
  • Skylark, GS 1971-1975
  • Skylark, GS 1977-1979
  • Chevy Full Size Car 1971-1996
  • Chevy II 1971-1979
  • Nova 1971-1979
  • Camaro 1971-1981
  • Firebird TA 1971-1981
  • Cutlass 1971-1977
  • El Camino 1971-1977
  • Monte Carlo 1971-1977
  • Impala 1991-1996
  • Olds Full Size 1971-1989
  • Pontiac  Full Size 1971-1989
  • Grand Prix 1971-1977
  • Lemans 1971-1977
  • GTO 1971-1977
  • Ventura 1971-1977

Specs


Warranties

Note: Circle track racing applications require a minimum of 4 qts. of rear end lube. Using less than this amount will lead to immediate pinion bearing failure.

Customer Reviews

Rated 4.8 out of 5 by 4 reviewers.
RATING BREAKDOWN
4 reviews
5 Stars
3
4 Stars
1
3 Stars
0
2 Stars
0
1 Star
0
RECOMMEND THIS PRODUCT:

richz28
Verified Purchaser
Oxford, PA 19363, USA
Product Rating

great fitment

March 04, 2015
This gears went right in with no issues... I received them on time...
Yes, I recommend this product.
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HrdRckMnr88
Verified Purchaser
Nevada
Product Rating

Good product

August 28, 2013
Install was efficient as spacing numbers were correct, no sharp burrs, price was good. Didn't have the time to check and see if all parts are American Made.
Yes, I recommend this product.
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WWRA 22 Valley Stock
Verified Purchaser
Lake Stevens WA
Product Rating

Nicely cut gears

June 11, 2011
[...]
Pros:
  • Durable
  • Easy To Install
Yes, I recommend this product.
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OG
Verified Purchaser
Chandler AZ
Product Rating

Good product.

November 20, 2011
Product used in weekend racer.
Pros:
  • Durable
Yes, I recommend this product.
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Page 1 of 1
91910

Product Q&A

6 questions : 6 answers

1 answers

Who made these gears? What brand are they?

Artshouldntbetooshort
August 24, 2013

Who made these gears? What brand are they?

Answers

August 26, 2013
Jason
The GM 10 bolt 8-1/2: ring and pinion comes from Richmond/Motive Gear.
1 answers

will the 5.57 gear work on the 2.73 carrier

booger
ga
April 16, 2013

will the 5.57 gear work on the 2.73 carrier

Answers

April 17, 2013
EricM
Yes it will work with the 2.73 carrier.
1 answers

will the 5.57 gear work on a 2.73 carrier

booger
ga
April 16, 2013

will the 5.57 gear work on a 2.73 carrier

Answers

April 17, 2013
EricM
Yes it will work with the 2.73 carrier.
1 answers

You do not list chevy k10 pickups?

none
sioux city iowa
July 22, 2011

You do not list chevy k10 pickups?

Answers

July 25, 2011
John
This ring and pinion does include some truck applications and a full list of applications is as follows: K10, K15 77-87 K10, K15 82-Pres. K20, K25 77-87 C10, C15 78-Pres. G10, G15 79-Pres. G20, G25 79-Pres. Buick Full Size 77-96 Blazer 77-91 Apollo 73-77 Regal 73-77 Century 73-77 Biscayne 71-74 Grand National 84-87 Skylark, GS 71-75 Skylark, GS 77-79 Chevy Full Size Car 71-96 Chevy II 71-79 Nova 71-79 Camaro 71-81 Firebird TA 71-81 Cutlass 71-77 El Camino 71-77 Monte Carlo 71-77 Electra 76-78 Gran Sport 73-77 Impala 91-96 LeSabre 73-74 Olds Full Size 71-89 Pontiac Full Size 71-89 Hurst Olds 85-89 Omega 73-75 Omega 77-79 Grand Prix 71-77 Lemans 71-77 GTO 71-77 Roadmaster 71-74 Roadmaster 91-96 Ventura 71-77 Phoenix 71-77
1 answers

I bought 5.38 8.5 ring gear & cross pin from you last week I'm getting ready to put it in I've got a 2.73 carrier will it work or do I need a space? I have a 3.08 carrier but it is in another car and I don't want to take it out.I've herad it needs to be a

dirty charlie
Lake Butler,FL.
January 23, 2012

I bought 5.38 8.5 ring gear & cross pin from you last week I'm getting ready to put it in I've got a 2.73 carrier will it work or do I need a space? I have a 3.08 carrier but it is in another car and I don't want to take it out.I've herad it needs to be a

Answers

January 25, 2012
Eric
Yes your 2.73 carrier will work with the 5.38 ring & pinion. The only reason you would need a spacer or to change the carrier is if your 8.5 10 bolt rear end had 2.56 or numerically lower gear ratio originally.
1 answers

WHO MAKES THIS GEAR?

ROOKIE
October 01, 2012

WHO MAKES THIS GEAR?

Answers

October 01, 2012
Jason
This ring and pinion is from Motive or Richmond Gear
Page 1 of 1

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Kit Includes:

  • cover gasket
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  • pinion seal
  • thread locking compound
  • sealer

Note: Pinion-depth shims are not included. 

Lubrication Engineers SAE 90 Weight Gear Oil, 1 Gallon
(Part #91044090)
                        Whether you're running a stock flattie and rearend or hopped-up overhead and quick change, you need to run a good gear lube. Remember that your rearend was designed fifty plus years ago and needs all the help it can get. 

The biggest improvement you can give it is a lubricant that will allow the gears to survive the highway speeds that cars see today. L.E. gear oil is what we use in our 350 mph streamliner, that uses a V-8 quick change, without failure. The "red stuff" provides superior lubrication for long gear life. You can't win if you don't finish. We suggest 90 weight for the street and 140 weight for extreme uses.

  • Formulated using blends of high quality paraffinic and synthetic base fluids
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  • Contains non-silicone defoaming additives
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LE Gear Oil Performance Data Sheet (PDF)

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