RMS Mega package is the most complete gear package in the industry. We use only high quality name brand parts to build the Mega package. Mega package assures you will have all parts required for a full rebuild/upgrade.


Elite Gear

Elite Ring and Pinion sets use the latest engineering and manufacturing technology to produce OEM quality gears at an affordable price. All Elite gears are machined from premium 8620 alloy steel, then heat treated to the strictest standards for maximum strength and durability. Elite gears then go through en extensive lapping process to assure easy setup, excellent contact patterns, and quiet operation.


Yukon Duragrip Posi LSD

The Yukon Dura Grip provides aggressive yet smooth traction to give you the confidence & performance you need. Get longer life and better traction with the heavy duty Yukon Dura Grip Positraction. The Yukon Dura Grip uses a nodular case and forged 4320 internals for added strength along with composite clutches for high performance and long life. All units are Rebuildable and many offer upgrades to increase aggressiveness for racing applications. 



Master Install Kit

Premium master install kit uses only the highest quality components including Koyo brand bearings. Included are carrier bearings and races, pinion bearings and races, pinion seal, complete shim kit, ring gear bolts, pinion nut, crush collar (if applicable), threadlock, marking compound, brush, and gasket or RTV silicone. 


stock photo

 Application: GM 8.5" Chevy 10 bolt Car rearend (will Not fit Truck) (will Not fit Impala) (will Not fit Bolt-in Axles)

  • 1972-1981 Camaro
  • 1972-1981 Firebird
  • 1972-1979 Nova
  • 1972-1977 Chevelle

Cover Bolts: 10

Axle Splines: 28

Pinion Splines: 30


Package includes the following:

1- GM 8.5" 4.10 Ring and Pinion (Elite Gear)

1- GM 8.5" Yukon Duragrip Posi LSD (28 Spline)

1- GM 8.5" Master Install Kit (Koyo Bearings)

1- Rear Cover (OEM stamped steel)

2- Axle Retaining Clips (c-clips)

2- Axle Bearings (2.250" OD 1.400" ID)

2- Axle Seals

1- Bottle Posi Additive







Shipping:  Most items ship within 24-48 hours of cleared payment. Please allow 2-10 business days for USPS shipping. 

                 We ship USPS, UPS, or FEDEX (our choice)

 Returns:   Returns on new, unused, unopened merchandise (or complete packages) in original packaging are accepted up to 30 days from the purchase date. 

                 All returns will be refunded less shipping and a 15% restocking fee.