Manual Transmission
This is a GM light-duty car transmission used from 1966-1985 model years. It has a cast-iron case and extension housing, and a 7 bolt side covers with reverse shift lever on this side cover. The Saginaw is often mistaken for a Muncie. The Muncie also has a 7 bolt side cover; however, the Muncie reverse lever is found in the extension housing and features an aluminum case.
There are several gear ratios for the Saginaw’s. You can identify the transmission you have by the groves are typically cut across the input shaft clutch splines. The Saginaw transmission adapters we manufacture will require the installation of a new output shaft. These transmissions are externally shifted and will require shifter components. We make an adapter to mate this transmission to a Jeep Dana 18 or 20 transfer case
SAGINAW 3 SPEED:
# OF SHAFT GROOVES 1st Gear 2nd Gear 3rd Gear
0 2.85 1.68 1.0
1 2.54 1.50 1.0
2 3.11 1.84 1.0
3 3.50 1.89 1.0
SAGINAW 4 SPEED:
# OF SHAFT GROOVES 1st Gear 2nd Gear 3rd Gear 4th Gear
0 2.84 2.01 1.35 1.0
1 2.54 1.80 1.44 1.0
2 3.11 2.20 1.47 1.0
3 3.50 2.47 1.65 1.0
Dates Produced .... 1966 - 1985
Manufacturer .... Saginaw
Case Length .... 9.625
Bellhousing Length ... 6.50
Over All Length .... 16.125
Case Material ... Cast Iron
Input Shaft Spline .... 1-1/8 10 spline
Length .... 6.50
Pilot Diameter .... .590
Length .... 1.00
Transmission Weight .... 90LBS