Precision Gear - GM 10 1/2" Ring and Pinion Gear Sets

Ring Gear Diameter:
Pinion Shaft Diameter:
Ring Gear Bolts:
Right Hand Threads:
Pinion Splines:
Cover Bolts:

10 1/2"
1.750"
12
1/2" x 20
30
14

Model	Year
K10, K15	90-Pres.
K20, K25	81-Pres.
K30. K35	89-Pres.
C10, C15	90-Pres.
C20	81-Pres.
C30, C35	83-Pres.

Ratio	Teeth	Part #
3.75	45-12	GM14/375
4.10	41-10	GM14/410
4.56	41-9	GM14/456
4.56+	41-9	GM14/456+
4.88+	39-8	GM14/488+
5.13+	41-8	GM14/513+

.................................................

+ Gear sets are designed "extra thick" to be used on 4.10 and numerically lower cases.

Installation Kits	Part #
Master Installation Kts
1987 & Eariler	GM14/MOKITE
1988 - Present	GM14/MOKITL
Installation Kits
1987 & Eariler	GM14/KITE
1988 - Present	GM14/KITL
Mini Installation Kits
	GM14/MKIT

• GM 7 1/4"
• GM 7 1/2" 
  (GM 7 5/8")
• GM 7 3/4"
  Borg-Warner
• GM 8.2" Chevy
• GM 8 1/4" IFS
• GM 8 1/2"
• GM 8 7/8" Car
• GM 8 7/8" Truck
• GM 9 1/4"
• GM 9 1/2"
• GM 10 1/2"
• GM 11 1/2"

Tech Note:

When replacing a 4.10 and numerically lower ratio gear sets with a 4.56 or higher gear, an extra thick ring gear must be used or the case must be changed to a 4.56 and higher case.