G2 GM 8.5 Inch 10 Bolt 4.56 Ratio Ring and Pinion - 2-2021-456

universal fit logo


  • G2 Axle and Gear | Part Number: G/22-2021-456
  • Popular Axle Manufacture:GM
  • Gear Ratio:4.56
  • Axle Location:Front|Rear
  • Fitment:Universal Fit
  • Axle Type:GM 10 Bolt 8.6 Inches|GM 10 Bolt 8.5 Inches



G2 Performance Ring & Pinion sets are engineered with todays most demanding applications in mind. Designed to hold up to oversized tires and high performance engines, these gears use the latest technology and materials in their manufacturing to give you the strongest and quietest performance gear sets available.

Customer Reviews

4.0 4.0
2 Customer ratings
4.0 "Awesome Results"

Big difference in performance. Feel the torque and power pull, Quiet Ride.Only thing is I havent seen any improvements in MPG.

from San Diego,CA |
4.0 Worked well fit perfect

If you really beat on your truck buy the warrenty offered by 4 wheel parts

from Luckey, Ohio |


Question & Answers

7 Answered questions

Q: What would be the correct install kit to order to install the G2 4.56 gears on my 1989 K5 Blazer with the GM 8.5 axles Answer this question

A: Use the G2 GM 8.5 Inch Master Ring and Pinion Installation Kit - PN: G/235-2021

Answered by Dave from 4WP HQ on 08/08/2022

Q: will this work in my 2007 Silverado 4.8 new body style and do I have to buy the master install kit for it to work? Answer this question

A: Hello Silverado The G/22-2021-456 Ring and pinion will fit your 2007 Silverado 1500 4.8L with a 10 bolt rear end. You will need the master install kit part number G/235-2022 to correctly do the installation. The 4.56 gears will work best withy a 35 inch tall tire. Thank You for your question. Jon Snyder 4Wheelparts

Answered by RK on 09/11/2015

Q: I have 1999 Chevy Silverado 5.3 with 3.73 gears. The truck is lifted 6inches with a Superlift (suspension lift) with 35"x10" Nitto Terra Grapplers. What gears would be best to compensate for the loss in torque from the lift and tires Answer this question

A: Thanks for the inquiry Hayden, the G2 Axle and Gear GM 8.5in. 10 Bolt 4.56 Ratio part # G/22-2021-456 we would recommend this ratio for that tire size.

Answered by RK on 09/06/2015

Q: Since I have a 4 wheel drive, I would also have to swap out the front gears as well correct? What would I want for that Answer this question

A: Hello Kyle You would need the same ratio for the front end also. You didn't say what year the truck is so I couldn't give you any part numbers. Thanks

Answered by Rody on 05/18/2015

Q: I have a 2010 chevy silverado and looking to leave my 3.08's behind for the 4.10's or 4.56's... I don't really know what I need to do the swap out though, any way you could get me a list of parts to do order? Answer this question

A: Thanks for the inquiry kyle, the G2 Axle and Gear GM 8.5in. 10 Bolt 4.56 Ratio part # G/22-2021-456 all you'll need is the gear set and we recommend a master install kit with bearings use part # G/235-2022A.

Answered by RK on 05/18/2015


G2 Axle & Gear uses the strongest and latest generation materials to manufacture products capable of handling heavy loads. When it comes to axle assemblies, core lockers, driveshafts and sway bars, G2 is the first name in durability and reliability. Off-roading can heap punishment on a Jeep and G2's laser-cut components offer superior handling on challenging terrain and on-road drives. Parts are easy to install and easy to service and above all, they remain operational in adverse environments. Shop G2 Axle and Gear Now


Learn More Download

Sign up to receive deals by email!

Sign up to receive deals by text!

Please Enter valid number

By submitting, you agree to receive recurring autodialed marketing text msgs (e.g. cart reminders) to the mobile number used at opt-in from 4 Wheel Parts (4WP) on 21208. Consent is not a condition of purchase. Msg frequency may vary. Msg & data rates may apply. Reply HELP for help and STOP to cancel. See Terms and Conditions & Privacy Policy