GM10-342A Ring & Pinion 3.42 Ratio 30 Spline 10 Bolt for GM 8.5
Product ID: 107102900
🔧OE direct fit for seamless installation
⚙️3.42 gear ratio for optimized torque
🛡️8620 heat-treated steel for extreme durability
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⚙️ Upgrade your GM drivetrain with precision power and rock-solid durability!
The Motive Gear GM10-342A Differential Ring & Pinion Set features a 3.42 gear ratio engineered for optimized torque transfer and smooth operation. Made from heat-treated 8620 steel, it delivers exceptional durability and wear resistance under heavy loads. Designed as a direct OE replacement for GM 8.5"/8.625" 10-bolt differentials, it fits a broad range of Chevrolet, GMC, Cadillac, Buick, Pontiac, and Oldsmobile models spanning 1970-2020. This set ensures easy installation, reliable performance, and is backed by a 1-year/50,000-mile warranty, making it the trusted choice for professionals and enthusiasts aiming to elevate their vehicle’s drivetrain.
| ASIN | B000S6BW4E |
| Best Sellers Rank | #333,832 in Automotive ( See Top 100 in Automotive ) #27 in Automotive Replacement Differential Rings & Pinions |
| Brand | Motive Gear |
| Customer Reviews | 4.5 4.5 out of 5 stars (40) |
| Date First Available | June 19, 2007 |
| Exterior | Machined |
| Item Weight | 17.7 pounds |
| Item model number | GM10-342A |
| Manufacturer | Motive Gear |
| Manufacturer Part Number | GM10-342A |
| Model | Motive Gear GM10-342A Differential Ring and Pinion |
| OEM Part Number | GM10-342A |
| Product Dimensions | 15.5 x 11 x 5.25 inches |
W**Y
Rear and rebuilt
Worked out good
J**E
Worth it.
About 50 smoke shows and 7,000 miles. Everything good so far.
S**O
Great fit
Works as it should, and described correctly. I recommend
J**F
Read the product description to verify the Item you will receive.
Be very careful when ordering this item as it has (as of 6-2026) more than one listing with different ASIN numbers. Be sure to read the product information completely as at least one of the numbers links to a 411 gear set instead of a 342. The correct ASIN is B000S6BW4E for the 342 gear set. I received two 411 gear sets before this was figured out. The correct gear set has rolled a acceptable pattern on the coast and drive sides.
C**T
Easy going!
Just finished my rear end with these gears. My pinion shim was gone since the last pinion gear welded it to the bearing so I had to Guess at about .029 and it turned out pretty good! Set at around 21 lbs of preload and about .007 of backlash with the original carrier shims. So far so good! Heel and toe were north and south but in the middle of the line so I’m rolling with it. did also used the proper oil for break in of 80w-90! Great buy at a great price
M**N
Good value
No issues, half the price of local suppliers, fit my 1990 Silverado
V**S
Ok
Good
C**O
Great product
Perfect description fit great
S**R
Gear set
Fit like it should works great!
Trustpilot
3 weeks ago
1 week ago