FACTORY 4 SPEED QUESTION

[1983mailbuwagon]

1980 MAILBU WITH A 305 V8 4 BARREL WITH THE M20 FROM G WOULD HAVE BEEN A MUNCIE IN IT FROM THE FACTORY????

I ALWAYS HERD ALOT OF PEOPLE SAYING THEY WERE SAGINAW BUT THE WHOLE M20,M21,M22 ARE USUALLY MUNCIE?

THANKS IN ADVANCE

 

[GP403]

Nope, if its a Muncie its not factory. They were all Saginaw to my knowledge.

 

[oldtinsmith]

In my "Catalog of Chevelle & El Camino ID Numbers 1964-87" it states: The V-8....LG4....4BC....305....(these are the trans) M31, M33, MD3, Mv4, M20.... (code)H. The 3 and 4-speed manual transmissions were Saginaws (from Muncie).

Doug

 

[1983mailbuwagon]

IT APPEARS FROM A OTHER RPO CODE SHEET THAT THE MM4 WAS A CODE FOR 4 SPEED MANUAL FROM A CAR WITH A SAGINAW BUT THIS CAR HAS A MM4 AND M20 RPO,

 

[GP403]

A quick google for "muncie vs saginaw" produces countless pages saying the same thing, that there were no "Muncie" transmissions in GM cars after '74. If there's one in your car, somebody put it there. The M20 RPO Code wouldn't mean you had an M-20 Muncie Transmission. I don't have a book that covers '83 Chevy, but for example my '76-'81 Pontiac parts book shows "MY1-M20" as the code(s?) used for a 4-speed in the "T" cars in '81, which is the Pontiac badged Chevette, T-1000.

http://www.hemmings.com/hmn/stories/200 ... ure25.html
http://www.hemmings.com/mus/stories/200 ... ure24.html
http://www.drivinithome.com/gm-muncie-4-speed-decoding/
http://www.nastyz28.com/chevy-manual-tr ... cation.php
http://www.ehow.com/facts_5481062_histo ... speed.html
http://www.ehow.com/how_7790892_tell-sp ... ssion.html

 

[GP403]

and yeah I do see where you're going with the whole "Muncie by Saginaw" business, but 99.9% of the time, if you're refering to a "Muncie" transmission, you're talking about one of the old ones.

 

[clean8485]

As others have already pointed out, it should be a Saginaw transmission. If by some slim chance it is a genuine Muncie (which is EXTREMELY unlikely), and you have rock solid evidence to prove it, you'd have a very rare car (probably one of none).

 

[1983mailbuwagon]

thank you for everyone that answered. I guess im going to bave to look and see what it is, i will let you know. the woman that has the car is the orignal owner and has the service history from it since day one , down to every oil change. have to yank it out of her garage and count the bolts on the side cover. has hasnt seen light of day since 1992. you should see the dust on it. lol

cool car regaurdless of the trans

no a/c
tack pkg
delay wipers
radio delete
4 speed stick
bucket console car

even has a little pocket on the rf kick panel

 

[ssn696]

Stick your head under the car. Unless the whole thing is buried in grease and grime, if you see aluminum it's a Muncie. If it's dark (cast iron), its a Saginaw. My money is on the Saginaw. That's what was in my 1978 Elco SS parts car. I regret dumping it, but I was in Hawaii and the Navy would only ship so much home when I got parole.