GENERAL MOTORS 3 SPEED TRANSMISSIONS: |
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Transmission Manufacture |
Model year and Physical Description |
Find Parts |
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MUNCIE (Light Duty) |
1940-63 Cars, 1940-68 Light Duty Trucks: |
Parts List |
74 |
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Cast iron case and extension housing with 4-bolt side cover. Has non-synchro 1st and a "barrel" type 2/3 assembly. Units from 1940-54 have enclosed driveline, otherwise known as a "torque tube". Those from 1955-68 may have electric overdrive. Some of 1964-65 units have larger gears with the same tooth count as the 1940-68 units. |
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SAGINAW |
1966-81 Cars, 1966-87 Light Duty Trucks: |
Parts List |
92 |
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Cast iron case and extension housing with 7-bolt side cover. Fully synchronized with 30 tooth synchro rings. 1966-69 units may have electric overdrive. It has a four step cluster and all the gears are helical cut. |
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BORG-WARNER T16 |
1965-68 Cars, 1968 Trucks |
Inquire |
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Cast iron case and extension housing with 9-bolt side cover. Fully synchronized with 27 tooth 1st gear and 36 tooth 2nd & 3rd gear synchro rings. Has case casting number T16-1X. Found in heavy duty applications. |
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MUNCIE (Heavy Duty) |
1969-74 Cars, 1969-76 Trucks |
Parts List |
75 |
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Cast iron case and extension housing with 7-bolt side cover. Fully synchronized with 36 tooth synchro rings. This is the only GM 3 speed with the same bearing front and rear. This transmission is found in performance applications. |
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TREMEC T160 |
1976-81 Trucks |
Parts List |
106 |
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Cast iron, top-loaded case with side shift linkage. Fully synchronized with 36 tooth synchro rings. Same unit as Ford RAT except for a GM bolt pattern to the bell housing. Has R28-20-15 cluster gear. Found in heavy-duty applications. |
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GENERAL MOTORS 4 SPEED TRANSMISSIONS: |
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BORG-WARNER T10 |
1957-88 Cars, 1968-70 Vans |
Parts List |
39 |
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Cases, extension housings and side covers may be cast iron or aluminum and in any combination thereof. Casting number T10-XX or 13-04 are on passenger side of case. They all have 9-bolt side covers and 36 tooth synchro rings. Reverse shift lever is located in the extension housing, along with main shaft reverse which is a straight cut gear. Some of the early units, found mostly in Corvettes, have a front nut like the Muncie M21. 1984-88 units have overdrive. |
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MUNCIE M21/M22 |
1963-74 Cars |
Parts List |
76 |
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Aluminum case, extension housing and side cover. The side cover has 7 bolts and 2 shifter cams. The synchro rings have 36 teeth and the unit has a 4-step cluster gear. Reverse gears are helical cut and are located in the extension housing. |
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SAGINAW |
1966-84 Cars, 1985-86 Astro/Safari |
Parts List |
92 |
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Cast iron case, extension housing and side cover. The side cover has 7 bolts and 3 shifter cams. The synchro rings have 30 teeth and the unit has a 5-step cluster gear. Reverse gears are straight cut and are located in the main transmission case. |
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VEGA/OPEL |
1971-72 Vega, 1968-74 Opel |
Not Available |
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Cast iron case with a flat pan on the bottom and shifter linkage that has one arm on each side of the trans. Shifter assembly is attached to the top of the extension housing where the two arms meet. |
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BRAZIL 70mm |
1977-87 T Body and H Body (Chevette/T1000) Order K100134 |
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Aluminum case, bell housing and extension housing. The main case is open at both ends, the bell housing. is separate and houses the two front bearings. There is an internal single-rail shift linkage with the shifter mounted on top of the extension housing. |
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BORG-WARNER T4C |
1982-84-Compact Trucks |
Parts List |
43 |
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All aluminum top-loaded transmission with the shifter on the top of the extension housing with an internal single-rail shift linkage. Front and rear main bearings are ball type and the cluster gear has a shaft running through it, that is supported by loose needles. Case casting is number 13-53. |
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