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#1
01-15-2021, 08:06 PM
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T-10 to Muncie switch ,77 T/A
Right now my 77T/A has a 462 with the original T10.whats needed besides a 10 spline clutch set up and a Muncie trans to do this.Its a numbers matching car and one day i will redo the motor
 ,but for now it has my 462 w/62 heads ported bla bla bla...I don't want to kill the T-10 thats original to the car.will every thing work with a Muncie...And what shifter will i need.
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1977 Trans Am,400 4 speed,numbers matching car  1979 Bonneville ,1 owner car...  1997 Trans Am convertible,LT1/auto. |
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#2
01-15-2021, 08:13 PM
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Often the shifter linkage will work reverse is a little different on the two . I used a Vertigate form a Muncie on the T10 from a 80 Camaro in my Camaro when it had the SBC in it. You can even convert the Munice input shaft to fine spline if you do not want to swap clutches. Clutch probably cheaper.
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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#3
01-16-2021, 10:49 AM
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t10
t10 also has a turbo 400 size output shaft most muncies are the smaller output shaft so you will have to change the driveshaft yoke also.
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#4
01-16-2021, 11:21 AM
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standard T10s had the small,ST10s has the T400.Some of the later Muncies also have the T400 output.Tom
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#5
01-16-2021, 12:04 PM
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The 77 should have an ST10. And yes TH400 yoke on them.
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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#6
01-16-2021, 12:12 PM
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FWIW, 71-74 M21 HD have the T400 yoke output shaft, and the fine spline input shaft. Also rumored to be stronger than a standard M21, (better alloy in the gears) hence the HD designation. I had one in my 73 Grand Am that I was never able to break, so if you can run across one of them for a reasonable price, it may have better longevity than the conventional Muncie.
I broke plenty of standard Muncies (M21 and M20s) over the years with street tires, so I have little faith in their abilities to live behind a stout Pontiac in a 4000# Firebird.
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Brad Yost 1973 T/A (SOLD) 2005 GTO 1984 Grand Prix 100% Pontiacs in my driveway!!! What's in your driveway? If you don't take some of the RACETRACK home with you, Ya got cheated   
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#7
01-16-2021, 12:50 PM
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By 1971, ALL Muncies had switched to 26 spline input shaft and 32 spline output, M20, M21, M22
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 66 GTO, 495, M22, Strange S-60 w/4.10 Sold new at Ace Wilson's Royal Pontiac http://www.youtube.com/watch?v=cUHC-Z8xhtg |
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#8
01-16-2021, 02:44 PM
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When Mid-America racing outlawed 4 speeds that were converted to 2 speeds I went to a ST-10 and just bought the u joint that had different ends.
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1979 Trans Am WS-6 .030 455 zero decked flat pistons 96 heads with SS valves 041 cam with Rhoads lifters 1.65 rockers RPM rods 800 Cliffs Q Jet on Holley Street Dominator ST-10 4 speed (3.42 first) w 2.73 rear gear __________________________________________________ _______________________________ 469th TFS Korat Thailand 1968-69 F-4E Muzzle 2 |
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#9
01-16-2021, 04:23 PM
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I’ve had better luck keeping ST10’s together than I have Muncies.
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#10
01-16-2021, 06:59 PM
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Quote:
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1977 Trans Am,400 4 speed,numbers matching car 1979 Bonneville ,1 owner car... 1997 Trans Am convertible,LT1/auto. |
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#11
01-16-2021, 09:52 PM
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rebuild what you have ...
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