GM Genuine Parts 5-Speed Manual Transmission Assembly
OE
Pack of 1

GM Genuine Parts 5-Speed Manual Transmission Assembly

GM Part #12383956

MSRP$3,500.11*

Power your Chevrolet, Buick, GMC, or Cadillac vehicle with a Genuine GM Parts 5-Speed Manual Transmission Assembly.

  • High shift quality with use of a high precision guide plate, anti-friction roller ball detents, and low-friction linear shift rail bearings
  • Use of low-friction oil, low-friction seals and bearings, as well as large, high-capacity synchronizers contribute to low shift efforts and shifter travel
  • All gears are hard-finished, which contributes to transmissions refined feel and low noise

Pack of 1

About this product

Power your Chevrolet, Buick, GMC, or Cadillac vehicle with a Genuine GM Parts 5-Speed Manual Transmission Assembly. Refinement is the hallmark of GM manual transmissions, as shift quality and noise levels are exceptional to support the performance expectations of GM's vehicle applications. The manual transmission shifting experience is swift, precise, quiet and effortless, and allows the driver to smoothly switch gears to the optimal gear for the vehicle's speed. Only Genuine GM Parts are tested to meet or exceed GM Original Equipment standards and are designed specifically to fit your vehicle.

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  • High shift quality with use of a high precision guide plate, anti-friction roller ball detents, and low-friction linear shift rail bearings
  • Use of low-friction oil, low-friction seals and bearings, as well as large, high-capacity synchronizers contribute to low shift efforts and shifter travel
  • All gears are hard-finished, which contributes to transmissions refined feel and low noise
  • Transmission cases are made of lightweight aluminum, which contributes to low vehicle curb weight
  • Designed and tested specifically for GM vehicles
  • Validated for consistent high-quality standards

ClassificationOE
Shift linkage TypeDirect
Shift linkageInternal
Integral Bell HousingNo
SynchromeshYes
Transmission Speeds5
Speedometer TypeElectric
Speedometer Drive TypeMagnetic
Fifth Gear Ratio1
Fourth Gear Ratio1.52
Third Gear Ratio2.54
Second Gear Ratio4.35
Reverse First Gear Ratio6.27
First Gear Ratio7.52

36 Months/100,000 Miles Limited Warranty for Parts (plus Labor if installed by a GM dealer)

Please visit our warranty page on Gmparts.com for full warranty details.

Good Maintenance Practices:

  • Before purchasing and installing a manual transmission assembly, make sure it is the correct size and fit for your vehicle.
  • Keep transmission fluid levels full.
  • Always start a vehicle from a standstill in first gear.
  • Do not change gears without engaging clutch.
  • Do not skip gears when shifting.
  • Regularly inspect manual transmission assemblies for signs of damage or failure, and replace them if signs of damage or failure are found.

Service manual transmission assemblies when signs of wear or failure are displayed, including but not limited to:

  • Transmission makes noise while shifting gears
  • Transmission difficult to shift
  • Noise from drivetrain during normal driving
  • Fluid leaks from transmission

ModelBody StyleTrimYear(s)
C6000 TopkickCab & Chassis - Conventional1994, 1995, 1996
C6500 TopkickCab & Chassis - Conventional1997, 1998, 1999, 2000
C7000 TopkickCab & Chassis - Conventional1994, 1995, 1996
C7500 TopkickCab & Chassis - Conventional1997, 1998, 1999, 2000

Frequently Asked Questions

No. You will need to separate the transmission from the engine.

No. The flywheel only needs to be replaced it if was damaged by a warn clutch plate or overheated.