chevy 4 speed manual transmission identification

Muncie 4 speed transmissions used both versions, Saginaw 4 speeds used bolt style and T-10 and ST-10 4 speeds use stud style. It was a matter of economics when Chevrolet needed a four-speed manual transmission for the Corvette in the mid-1950s. Chevrolet/GMC/Geo: Model: Years: Transmission Type: Engine Type/Size: Transmission Model: Remarks: Astro: 1989-1992: TH700-R4/4L60: ASTRO/SAFARI: 1995-2003: 4 SP RWD/AWD It is an excellent 4 speed to swap into a Jeep with a Chevy … The chart on the link below will help you ID your trans to help you figure out what is the correct Hurst Shifter and Linkage Installation kit. 7 bolt side cover 1970, 454 Chevelle 5-SPEED TRANSMISSION I.D. Pre ‘69 Muncie’s use a stud & nut at the indicated attachement point, while ‘69 and later Muncie’s use a bolt as illustrated on the right. * MUNCIE Shaft Identification The above Muncie 4 speed transmissions can be distinguished from the style of the transmission arm attachment. Main >> Transmission >> Identification >> GM >> SM420 The SM420 is the older heavy duty, granny, 4 speed transmission used in Chevy and GM trucks. That the Muncie has much in common with the T-10 is no accident. RPO code M20 significances the 4 Speed version, this overdrive will have a code of “O”. The Saginaw transmission was engineered and manufactured in Saginaw Michigan for the Chevrolet General Motors, vehicles with RPO code M15 utilized the Saginaw 3 speed, you should be able to find a “S” on the passenger side of the case rear cover. Read further about Chevrolet's favorite gearbox. This meant that the transmission’s front bearing retainer and register bore of the bellhousing were also smaller in diameter. The T10 front bearing size was reduced in diameter in 1963 only. MUNCIE M-22 (453) G.M. The early production Muncie four-speed case is the small-bore unit and can be identified by the GM casting number 3831704 (see Muncie M20/M21/M22 Main Case Identification chart). The large cast iron case with large bulge on the passenger sidemakes it easy to identify. T86 top, T85 bottom Four speed manual T-10 T-10 ... 3 for 4-speed transmissions Cast iron tail housing Saginaw 4-speed Gear Ratios; Input 1st Gear 2nd Gear 3rd Gear 4th Gear Notes No grooves 2.84 2.01 1.34 1.00 1 groove 2.54 4 Speed Transmission Identification Chart We often have customers asking us how can they identify the 4 speed transmission in their car or truck. 1963-1965 Model Years. Common manual transmission identification Bellhousing bolt pattern and measurements Three speed manual. Pre-1969 Muncies use a stud and nut at the indicated attachment point, while 1969 and later Muncies use a bolt as illustrated on the right. GM Transmission Identification: Manual Transmissions As mentioned above, modern 5-speed and 6-speed manual transmissions are easy to identify, but older 4-speed transmissions have more variety. The Muncie case (3831704) replaced the T10 4-speed in the 1963 Chevrolet Bel Air and Corvette by mid-May of that year. CHART *MUNCIE Shaft Identification: Muncie 4-speed transmissions can be distinguishedvfthe rom style of the transmission arm attachment. The reason the style of the transmission is important is for transmission lever and shifter installation parts identification. The Muncie transmission began replacing the Borg-Warner 4-speed transmission on Wednesday, February 6, 1963, when the first Muncie 4 speed transmissions were shipped to the Baltimore Final Assembly Plant for installation into Chevrolet passenger cars.

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