Precision Gear - GM 7 1/2" (7 5/8") Ring and Pinion Gear Sets

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

7.5"
1.438"
10
7/16" x 20
27
10

Model	Year
GM
S10, S15	82-Pres.
Astro & Safari	85-Pres.
Bravada	91-Pres.
Buick Full Size Car	77-85
Camaro	88-02
Century	78-81
Chevy Full Size Car	77-96
Cutlass	78-87
Firebird, TA	82-02
Grand Prix	78-87
Monte Carlo	78-87
Olds Full Size	77-89
Omega	75-79
Pontiac Full Size	77-89
Phoenix	78-81
Regal	78-87
Skylark	76-79
Ventura	78-81
ISUZU
Rodeo	89-93

Ratio	Teeth	Part #
3.08	40-13	GM7/308
3.23	42-13	GM7/323
3.42	41-12	GM7/342
3.42+	41-12	GM7/342+
3.73	41-11	GM7/373
3.73	41-11	GM7/373+
4.10	41-10	GM7/410
4.10+	41-10	GM7/410+
4.56	41-9	GM7/456•
4.56+	41-9	GM7/456+•

Installation Kits	Part #
Master Installation Kts
1975-1981	GM7/MOKITE
1981-Present	GM7/MOKITL
Monza	GM7M/MOKIT
Installation Kits
1975-1981	GM7/KITE
1981-Present	GM7/KITL
Monza	GM7M/KIT
Mini Installation Kits
	GM7/MKIT
Monza	GM7M/KIT
Pinion Bearing Set-Up Kit
81-Present	PINSU5
75-81	PINSU24

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+ Gear sets are designed "extra thick" to be used on 3.08 and numerically lower cases.

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• Requires a modified cross shaft for installation. Use part number GM7/XSM.

Tech Note:

When replacing a 3.08 and numerically lower ratio gear sets with a 3.23 or higher gear, an extra thick gear must be used or the case must be changed to a 3.23 and higher case.. 7 1/2" and 7 5/8" gear sets directly interchange with each other.

• 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"