This Allstar Performance ring and pinion gear set is built for GM 7.5in 10-bolt rear-end housings using a thick ring gear and the 2 Series carrier. It uses a 27-spline pinion and a 3.73 ratio ring and pinion pair that is lapped together at the factory as a matched set for quiet operation. Suitable for race, street, and off-road use.
Allstar Performance Ring & Pinion Spec Sheet (PDF)
Compatibility
Fits GM 7.5in 10-bolt rear-end housings using a thick ring gear, 2 Series carrier, 3.73 ratio, 27-spline pinion, sold as a kit.
FAQ
What ratio is this Ring & Pinion set?
This Allstar Performance Ring & Pinion set (ALL70115) has a 3.73 ratio.
What housing does this Ring & Pinion set fit?
This set is designed for GM 7.5in 10-bolt rear-end housings using the 2 Series carrier.
How many splines does the pinion have?
The pinion has 27 splines.
Is this Ring & Pinion set sold as a matched pair?
Yes. The ring and pinion are lapped together as a matched set at the factory for quiet operation.
What does "Thick" mean for this Ring & Pinion set?
Thick refers to a thick ring gear used with the 2 Series carrier, as opposed to the standard ring gear used with the 3 Series carrier on GM 7.5in 10-bolt housings.

