USA Standard Gear (ZK GM8.6-B) Master Overhaul Kit for GM 8.6 Differential
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USA Standard Gear (ZK GM8.6-B) Master Overhaul Kit for GM 8.6 Differential

4.4/5
Product ID: 29727417
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🔩Complete ring gear bolts & pinion nut
⚙️Precision Koyo bearings & races
🛡️OEM-surpassing durability & quality

Description

⚙️ Upgrade your GM 8.6 differential with confidence—master the road, master the kit!

  • ALL IN ONE MASTER KIT - Includes every essential component—carrier & pinion bearings, seals, shims, bolts, and crush sleeve—for a seamless overhaul.
  • ENGINEERED FOR EXCELLENCE - Koyo bearings and races ensure ultra-smooth, long-lasting performance beyond OEM standards.
  • CONFIDENCE IN EVERY INSTALL - USA Standard Gear’s rigorous quality control eliminates failure points, so you can trust your differential rebuild.
  • MADE IN JAPAN BUILT TO LAST - Premium manufacturing origin combined with superior materials means your GM 8.6 differential stays road-ready for miles.
  • PRECISION MACHINED COMPONENTS - Every part is crafted with exacting tolerances to guarantee perfect fit and optimal drivetrain efficiency.

The USA Standard Gear ZK GM8.6-B Master Overhaul Kit is a comprehensive, precision-engineered solution for GM 8.6 differentials. Featuring premium Koyo bearings and races, a full complement of carrier and pinion components, and OEM-exceeding quality control, this Japanese-made kit ensures a reliable, durable rebuild that professionals trust.

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Specifications

ManufacturerUSA Standard Gear
BrandUSA Standard Gear
ModelMaster Overhaul Kit for GM 8.6 Differential
Item Weight7.34 pounds
Product Dimensions12 x 13 x 3 inches
Country of OriginJapan
Item model numberZK GM8.6-B
ExteriorMachined
Manufacturer Part NumberZK GM8.6-B
OEM Part NumberZKGM8.6B
Special FeaturesThis kit uses Koyo bearings and races, Included are carrier bearings and races, pinion bearings and races, pinion seal, complete shim kit, ring gear bolts, pinion nut, crush sleeve (if applicable), oil baffles and slingers (if applicable), USA Standard Master Overhaul kits let you finish your install with confidence

Reviews

4.4

All from verified purchases

K**T

Phenomenal Customer Service - Answered phone call on 2nd ring and I talked to a PERSON!

Short summary: Parts are great and customer service is better - Thank you Troy!!! This is an amazing company. I ordered the kit expecting a baffle and pinion oil slinger to be included. Thinking it was an error (after turning my shop upside down thinking I lost them) I had ordered a replacement. That kit too did not have the pinion baffle or oil slinger. Discouraged, I looked at the packing slip and called the 888 number. Troy picked up on like the 2nd ring and took care of me! After explaining my frustration at the project and very willing to pay Troy is sending them out free of charge 2day delivery.Troy, you are tha man! I sincerely appreciate you and I'm just sad I didn't have the confidence to call sooner.I will be getting all my gearing equipment from Drivetrain America moving forward.

V**C

Good

Good

T**!

Master install kit

This kit was just what I needed to get the differential set up and put together. It came with all the shims, bearings, seal and new nut.

P**S

Worked for my application.

Was as described.

A**L

Good product

Good product, 8 months later open up the case to throw a different rear gear & bearings look in good shape, only thing wrong I received the wrong pinion seal in the kit besides that it was solid

N**N

Everything i needed.

Note this is a small bearing kit

A**R

The parts that I ordered

I received the box this morning with only the rear inspection plate cover gasket inside, no bearings no nothing except a gasket and I really need these brgs bad , the box has - had no tape anywhere it just opened up !! Please send these out ASAP !! Thanks Drewey

V**E

Fits perfectly

Fits like a glove, the bearings were actually stamped made in Japan and everything looks and fits correctly

Common Questions

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

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€ 474.42

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Usa Standard Gear Zk Gm8 6 B Master Overhaul Kit | Desertcart French Guiana