4. Saginaw 3 & 4 Speeds

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

 

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