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Welcome visitor can you Login or Create an Account. Log In Username. Login Forgot Your Password? Forgot Your Username? New Customer? Create an Account. How to identify chevrolet gmc manual transmissions Use the following information to compare physical description of your Chevrolet or GMC manual transmission in order to identify what model transmission is in your vehicle.
We offer quality rebuilt manual transmission, parts and rebuild parts kits that are designed to be top of the line. After locating correct unit a link is supplied to provide detailed information on specific kit and parts that are available for your unit. Information is provided for General Motors 3 speed , 4 speed , 5 speed and 6 speeds manual transmissions.
Units from have enclosed driveline, otherwise known as a "torque tube". Those from may have electric overdrive. Some of units have larger gears with the same tooth count as the units. Fully synchronized with 30 tooth synchro rings. It has a four step cluster and all the gears are helical cut. Has case casting number TX. Found in heavy duty applications.
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. Has R cluster gear. Found in heavy-duty applications. Casting number TXX or 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 M 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. 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. Shifter assembly is attached to the top of the extension housing where the two arms meet. The main case is open at both ends, the bell housing. There is an internal single-rail shift linkage with the shifter mounted on top of the extension housing. 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 Front and rear main bearings are tapered. The cluster gear is solid and is supported on each end by cylindrical roller bearings located in the case. Case castings numbers are or The Isuzu logo is cast into the left side of the case.
Is not found in the Chevy LUV. It has a rectangular cast iron front bearing retainer and a 27 tooth rear output shaft. The front and rear countershaft bearings are both 25x62x Side-loaded with either aluminum or cast iron case and used in both gas and diesel applications.
All of these units are 3 speeds with Overdrive. Cast iron case with cast iron top cover. All gears on the countershaft are removable except for 1st. Early units have threads on the input shaft and do not have a front seal. Has GM casting numbers and one P. Cast iron case with cast iron top cover from and an aluminum top cover Non-synchronized 1st with brass synchro rings for 2nd-4th. All main shaft gears ride on bushings pressed on the shaft.
The only gears that are removable from the countershaft are 3rd and 4th. Has GM casting numbers and two P. Main bearings may be either ball or tapered design.
Non-synchronized 1st gear, synchronized 2nd-4th. There are no brass synchro rings. All gears, including reverse, are helical cut. See New Process for more information. The bell housing. It has a removable tube that the throwout bearing rides on. The main bearing in this unit is comprised of caged needles in shell races. Loose needles and flat thrust bearings are used throughout the transmission.
Casting number is Limited parts availability. Parts List 54 Aluminum case, end-loaded unit with an integral bell housing. Isuzu logo is cast into the drivers side of the case. This is found only is GM diesel applications and has a different starter position than the unit that goes into the Isuzu vehicles. Aluminum case with top cover, internal single-rail shift with the shifter mounted on the extension housing. Casting numbers on the case, cover or extension housing are or The cluster gear is supported on both ends by cylindrical roller bearings.
The number on the front cluster gear is DK All five synchro rings are brass. Similar physical appearance and is best to remove the top cover in order to distinguish between the two. If you are unable, you can check the number of the front cluster bearing. The number on the front cluster gear bearing is BCE.
These similar transmissions have three different designs and designations. Teardown is necessary before ordering rebuild kit as the differences between them are integral. It is a fully synchronized Overdrive transmission including reverse. It may be identified by a tag attached to the P. The four main supporting bearings in this unit are tapered.
Positractions 4 Different types of differentials, whats the difference? What rear end ratio do I have in my Ford is it posi! Need help finding the right parts for your vehicle? Get a Quick Quote. Cast iron case and extension housing with 4-bolt side cover. Cast iron case and extension housing with 7-bolt side cover. Cast iron case and extension housing with 9-bolt side cover.
Cast iron, top-loaded case with side shift linkage. Cases, extension housings and side covers may be cast iron or aluminum and in any combination thereof. Aluminum case, extension housing and side cover. Cast iron case, extension housing and side cover. Cast iron case with a flat pan on the bottom and shifter linkage that has one arm on each side of the trans. Aluminum case, bell housing and extension housing. All aluminum top-loaded transmission with the shifter on the top of the extension housing with an internal single-rail shift linkage.
All aluminum top-loaded transmission with shifter on top of the extension housing with internal single-rail shift linkage. Aluminum end-loaded transmission with integral bell housing. Same transmission as the A with Overdrive that is found in Dodge trucks.
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