What was the layout of the Muncie 4 speed transmission?

Therefore, the Muncie patent is basically a design for the layout of a 4-speed transmission. This “layout” is a 4-speed transmission with four forward gear ratios in the main case, a midplate bearing support, and a reverse gearset in the extension housing. This Tech Tip is From the Full Book, GM TURBO 350 TRANSMISSIONS: HOW TO REBUILD AND MODIFY.

How can I find the VIN on my Muncie 4 speed?

A service technician can use a scanner to find a VIN, and any known service issues are easily found. From the 1960s until the late 1980s General Motors issued Technical Service Bulletins by mail or fax to alert dealerships of potential service issues. I’m not a fan of these but I do understand their importance.

How big is the thrust washer on a Muncie 4 speed?

It had a thrust washer behind first gear that floated on the rear bearing inner race. The countershaft diameter of 7/8 inch and front bearing were both carried over from the T10 4-speed design. The shifter shafts had 5/1618 threaded studs. This is not a Muncie 4-speed retainer. number 591620. It can be used as an adapter-bearing retainer.

What kind of rust does a Muncie transmission have?

The materials used in case construction mean that if you find one of these gear boxes in a shed or barn, the Muncie will probably be smooth and covered in grease and/or oil, while a Borg Warner or Saginaw transmission will usually be coated in a light layer of rust.

What is the casting number on a Muncie 4 speed transmission?

The casting number 3925660 denotes this as a 1968 – 1970 Muncie with a 1-inch cluster shaft. In order to correctly identify a Muncie four-speed transmission, several visual clues are needed, and those cues involve the casting numbers on the case, side cover, and tailshaft.

What was the transmission ratio for the GM Muncie?

The Muncie’s appearance, design, and operation did not change much during the transmission’s use in GM production cars. However, there were several design upgrades and modifications made during the total production run. The Muncie four speed was produced in two ratios: the wide ratio (M20) and the close-ratio (M21).

Is the SM465 a 4 speed manual transmission?

The SM465 is a four speed, RWD or 4WD transmission.

Which is better Borg Warner or Muncie transmission?

Basically, if you are installing one or the other in a car that will be a nice driver and see only minimal, spirited gear grabbing, both the Saginaw and the Borg Warner can be a good and less expensive alternative to the more robust Muncie.