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SLICKMAN
Senior Member

785 posts [100%]
Fishkill NY

trannsmissions used from 1963 to 1982? | 11:41 AM 8/9/2002 |

I was looking into possible upgrades for a C3 transmission at http://www.gearvendors.com/ The sales guy told me that my transmission was not an M20 when it states this right on my build sheet…. Here is what he sent me;
The Muncie stopped production in 74, I would double check your info on that car and make sure, We do fit the muncie, at this time we don't fit the T-10 or the 4+3 tranns. I hope you do have a muncie.
If your car is all original, this is the stats.

1963-1974 M-20-21-22's
1975-1983 T-10's and Super T-10's
1984-1988 4+3 Trannys.

All Muncie transmissions start with the letter "P" Give us a call when you get a chance If you would like to discuss the matter more in depth, Farris Davis @ 800-999-9555

My 78SA should have a T10?? I don’t think so!!

[Modified by SLICKMAN, 2:43 PM 8/9/2002]
_______

======Corvette, its a state of mind!=======
1978 Silver Anniversary, with the options below (1 of 25)

27,000 mile Survivor, all original, L82, 4 speed, 3:70 Posi,
Gymkhana Suspension, 25th Anniversary Silver paint,
Oyster leather/Cloth interior, PL, PS, PB, PW,
Sport Mirrors, Tilt-Telescopic wheel, Alum Wheels,
Convenience Group, AC, P255/60-R15 Good-Years,
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gerry72
Senior Member

849 posts [100%]
San Antonio TX

Re: trannsmissions used from 1963 to 1982? (SLICKMAN) | 11:43 AM 8/9/2002 |

Afraid he's right.

SLICKMAN
Senior Member

785 posts [100%]
Fishkill NY

Re: trannsmissions used from 1963 to 1982? (gerry72) | 11:45 AM 8/9/2002 |

I thought the T10 had the shifter built into the rear tail? Also, my build sheet states that it has an "M20" tranny. I don't get it!
_______

======Corvette, its a state of mind!=======
1978 Silver Anniversary, with the options below (1 of 25)

27,000 mile Survivor, all original, L82, 4 speed, 3:70 Posi,
Gymkhana Suspension, 25th Anniversary Silver paint,
Oyster leather/Cloth interior, PL, PS, PB, PW,
Sport Mirrors, Tilt-Telescopic wheel, Alum Wheels,
Convenience Group, AC, P255/60-R15 Good-Years,
Stereo Tape W/AM/FM 8 track, Dual rear speakers...

Save the wave!

More pictures of my Baby -->> http://www.hotrodder.com/nick

45ACP
Senior Member

1345 posts [100%]
Southern Maine, USA

Re: trannsmissions used from 1963 to 1982? (SLICKMAN) | 11:52 AM 8/9/2002 |

He has this information partially wrong.
I do not have the correct data at my fingertips at the moment, so will do some digging around and, with any luck, post the C3 info later.
edit> reworded for clarity.

[Modified by 45ACP, 4:00 PM 8/9/2002]

[Modified by 45ACP, 4:08 PM 8/9/2002]

45ACP
Senior Member

1345 posts [100%]
Southern Maine, USA

| 12:40 PM 8/9/2002 |

If anybody sees any errors, don't be shy. To my knowledge, there were twelve different trannies used in C3s -
Manuals -
Saginaw 3 speed - '68-'69. RPO "M13". 2.54,1.56, 1.00, (R)2.41
Muncie 4 speed - '68-'74partial. RPO "M20". 2.52, 1.89, 1.24, 1.00, (R)2.59.
Muncie 4 speed, close ratio - '68-'74partial. RPO "M21". 2.20, 1.64, 1.24, 1.00, (R)2.27
Muncie 4 speed, heavy duty - '68-'71. RPO "M22". Know by some as the "rock crusher". A heavy duty version of the close ratio Muncie. Ratios same as M21 above.
Borg-Warner Super T10 - '74partial-'79. RPO "M20". 2.64, 1.75, 1.34, 1.00, (R)2.55
Borg-Warner Super T10, close ratio - '74partial-'79. RPO "M21". 2.43, 1.61, 1.23, 1.00, (R)2.35
Saginaw 4 speed - '78-'79. Used as base tranny in L48 cars only. 2.85, 2.02, 1.35, 1.00, (R)2.85
Borg-Warner Super T10 - '80-'81. RPO "M18". 2.88, 1.91, 1.33, 1.00, (R)2.78
Automatics-
THM400 - '68-'77. RPO "M40". 2.48, 1.48, 1.00
THM350 - '76-'79. RPO "M38". 2.52, 1.52, 1.00
THM350C - '80-'81. RPO "MX1". Lock-up version of THM350.
700R4 - '82only. RPO "MD8". 3.06, 1.63, 1.00, .76
Note: '74 model year cars may have a Muncie OR a Borg-Warner tranny. The changeover occurred during February/March of 1974.

MotorHead
Senior Member

1396 posts [100%]
wuname Sarcastic Tire Spinner Mississauga Ontario

Re: (45ACP) | 12:58 PM 8/9/2002 |

I heard thru the grapevine that Muncie was making an overdrive manual that could be dropped in to a C3 with no fuss or muss ( production replacement), anyone know anything about this ?
_______

1980 Numbers Matching 400 HP L48 4sp, Sportsman II heads 200cc
Flat top pistons, Comp Cams 270H MAGNUM (1.6 rockers), 10:1 CR
Holley 750 DP Mechanical, Edelbrock RPM Air Gap , Hedman Headers,
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BFG 295,265's 50 Series, Motor and Paint by the boys at Dream Car Garage

45ACP
Senior Member

1345 posts [100%]
Southern Maine, USA

Re: trannsmissions used from 1963 to 1982? (SLICKMAN) | 1:13 PM 8/9/2002 |

quote:
I was looking into possible upgrades for a C3 transmission at http://www.gearvendors.com/ The sales guy told me that my transmission was not an M20 when it states this right on my build sheet…. Here is what he sent me;
The Muncie stopped production in 74, I would double check your info on that car and make sure, We do fit the muncie, at this time we don't fit the T-10 or the 4+3 tranns. I hope you do have a muncie.
If your car is all original, this is the stats.

1963-1974 M-20-21-22's
1975-1983 T-10's and Super T-10's
1984-1988 4+3 Trannys.

All Muncie transmissions start with the letter "P" Give us a call when you get a chance If you would like to discuss the matter more in depth, Farris Davis @ 800-999-9555

My 78SA should have a T10?? I don’t think so!!

[Modified by SLICKMAN, 2:43 PM 8/9/2002]

Soooo . . . to answer your question, unless somebody swapped one in, you do NOT have a Muncie or the old T10 in your car.
It could be a Borg-Warner Super T10 or a Saginaw.

inferno-vette
Senior Member

814 posts [87%]
Portland OR

Re: trannsmissions used from 1963 to 1982? (SLICKMAN) | 1:26 PM 8/9/2002 |

quote:
I thought the T10 had the shifter built into the rear tail? Also, my build sheet states that it has an "M20" tranny. I don't get it!

In 1967, Chevrolet changed the shifter lever mounting from a transmission mount to a frame mount. The purpose of this change was to cut down on rattles and vibrations coming from the shifter. Quote from VIP
Paul

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