There is an internal single-rail shift linkage with the shifter mounted on top of the extension housing.Īll aluminum top-loaded transmission with the shifter on the top of the extension housing with an internal single-rail shift linkage. is separate and houses the two front bearings. The main case is open at both ends, the bell housing. Shifter assembly is attached to the top of the extension housing where the two arms meet.ġ977-87 T Body and H Body (Chevette/T1000) Order K100134Īluminum case, bell housing and extension housing. Reverse gears are straight cut and are located in the main transmission case.Ĭast iron case with a flat pan on the bottom and shifter linkage that has one arm on each side of the trans. The synchro rings have 30 teeth and the unit has a 5-step cluster gear. The side cover has 7 bolts and 3 shifter cams. Reverse gears are helical cut and are located in the extension housing.Ĭast iron case, extension housing and side cover. The synchro rings have 36 teeth and the unit has a 4-step cluster gear. The side cover has 7 bolts and 2 shifter cams. 1984-88 units have overdrive.Īluminum case, extension housing and side cover. Some of the early units, found mostly in Corvettes, have a front nut like the Muncie M21. Reverse shift lever is located in the extension housing, along with main shaft reverse which is a straight cut gear. They all have 9-bolt side covers and 36 tooth synchro rings. Casting number T10-XX or 13-04 are on passenger side of case. Found in heavy-duty applications.Ĭases, extension housings and side covers may be cast iron or aluminum and in any combination thereof. Same unit as Ford RAT except for a GM bolt pattern to the bell housing. Fully synchronized with 36 tooth synchro rings. This transmission is found in performance applications.Ĭast iron, top-loaded case with side shift linkage. This is the only GM 3 speed with the same bearing front and rear. Found in heavy duty applications.Ĭast iron case and extension housing with 7-bolt side cover. Fully synchronized with 27 tooth 1st gear and 36 tooth 2nd & 3rd gear synchro rings. It has a four step cluster and all the gears are helical cut.Ĭast iron case and extension housing with 9-bolt side cover. 1966-69 units may have electric overdrive. Fully synchronized with 30 tooth synchro rings. Some of 1964-65 units have larger gears with the same tooth count as the 1940-68 units.Ĭast iron case and extension housing with 7-bolt side cover. Those from 1955-68 may have electric overdrive. Units from 1940-54 have enclosed driveline, otherwise known as a "torque tube". Has non-synchro 1st and a "barrel" type 2/3 assembly. 131344 replaced by 10016044)/Rect/Subj(Sticky Note)/Subtype/Text/T(nicole.Cast iron case and extension housing with 4-bolt side cover.
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