Would like to know how to tell the GM 4 speed trannys apart? What the numbers mean, the rings on the imput shaft mean? Need to know all i can so i don't get screwed when i go to pick one up.

Thanks
Rickey

Best bet is to go into Google (www.google.com) and type in Muncie,Borg Warner etc and follow the links and print out what you find. There are many sites withh the info you seek. As an example..
http://www.dandltransmission.com/borgratio.html

Kev

The rings on the shaft were for assembly. It identified the gear sets for the guys on the assembly line slamming them together.

Just think SBC motors went together with the same infinite care. All the corresponding colored dots on the rods went together in one motor (denoted balance +/-) hit them with the impact and down the line. Compression height checked with go/no go gauges, etc. Makes you appreciate statistical variance and economics of scale because they all worked.


Larger Dave

The rings on the shaft were for assembly. It identified the gear sets for the guys on the assembly line slamming them together.

Just think SBC motors went together with the same infinite care. All the corresponding colored dots on the rods went together in one motor (denoted balance +/-) hit them with the impact and down the line. Compression height checked with go/no go gauges, etc. Makes you appreciate statistical variance and economics of scale because they all worked. Larger Dave
Once again, engineering at its finest, defines the KISS Principle.

Cast iron case and tail shaft housing, all shift levers on the inspection cover, Saginaw four speed.

All alum case construction, reverse shift lever in the tailshft housing, Muncie four speed. If main case has a drain plug, could be a close-ratio. If allowed to remove cover for inspection, the straighter angle of the gear teeth, closer to a close-ratio and/or Rock Crusher, M22.

I think, if cast iron case and inspection cover on top of case, Borg-Warner T10. There is a Suoer-T10, but I am unfamiliar with outside identity.