VW Mk1 Golf Transmission

The MK1 Golf, also known as the Volkswagen Golf Mk1, is a pioneering model in the compact car segment, introduced by Volkswagen in 1974. One of the key engineering aspects that contributed to its success was its innovative transmission system, which played a pivotal role in delivering efficient power transfer and driving dynamics. Let’s delve into the intricacies of the MK1 Golf transmissions, highlighting its front-wheel drive setup with a single-disc dry clutch, locking-synchronized four or five-speed manual transmission, differential, and double-jointed half-axles.

  1. Front-Wheel Drive via Single-Disc Dry Clutch: The MK1 Golf embraced front-wheel drive, a configuration that offered numerous advantages in terms of space utilization, weight distribution, and traction. Central to this setup was the single-disc dry clutch, a fundamental component responsible for engaging and disengaging the engine’s power from the transmission system. The dry clutch design ensured minimal slippage during engagement, enhancing efficiency and longevity.
  2. Locking-Synchronized Four or Five-Speed Manual Transmission: The heart of the transmission system in the MK1 Golf was its locking-synchronized manual gearbox, available in either four or five-speed configurations. These gearboxes were engineered to provide smooth and precise shifts, allowing drivers to effortlessly navigate through various driving conditions. The synchronization mechanism ensured that gear changes occurred seamlessly, reducing wear on the transmission components and enhancing driving comfort.
  3. Differential: At the core of the MK1 Golf’s transmission system lay the differential, a crucial component responsible for distributing engine power to the wheels while allowing them to rotate at different speeds during cornering. The differential’s role in optimizing traction and stability cannot be overstated, particularly in front-wheel-drive vehicles like the MK1 Golf. By intelligently managing torque distribution, the differential contributed to the car’s balanced handling characteristics and overall driving dynamics.
  4. Double-Jointed Half-Axles: To transmit power from the differential to the drive wheels, the MK1 Golf employed double-jointed half-axles. These components comprised two flexible joints, one at each end, allowing for articulation and accommodating the vertical movement of the suspension. This design not only facilitated smoother power delivery but also helped minimize torque steer, a phenomenon commonly associated with front-wheel-drive vehicles. By reducing drivetrain vibrations and ensuring constant power delivery, double-jointed half-axles played a crucial role in enhancing the MK1 Golf’s drivability and overall performance.

In summary, the MK1 Golf’s transmission system was a testament to Volkswagen’s commitment to engineering excellence and innovation. By integrating front-wheel drive with a robust manual gearbox, differential, and double-jointed half-axles, Volkswagen created a compact car that delivered exceptional performance, efficiency, and driving pleasure. The legacy of the MK1 Golf continues to influence automotive design and engineering to this day, setting a benchmark for generations of compact cars to come.

4 Speed Gearboxes

Code1st Gear
2nd Gear3rd Gear4th Gear5th GearR&PNotes
GC3.451.941.290.97N/A3.894 speed up to 1980
GC3.451.941.280.91N/A3.894 speed from 1981
GN3.451.941.280.91N/A3.894 speed from 1981
GP3.451.751.060.71N/A3.893+E from 1981
GL3.451.751.060.71N/A3.893+E from 1981
GY3.451.751.060.71N/A4.173+E Pick up

5 Speed Gearboxes

Code1st Gear
2nd Gear3rd Gear4th Gear5th GearR&PFlange DiameterNotes
FO3.451.941.290.970.763.8990mm11/1978 to 05/1979
FF3.451.941.290.970.763.8990mmup to 07/1980
FF3.451.941.290.910.713.8990mmFrom 1981
FN3.451.941.290.970.763.8990mmup to 07/1980
FN3.451.941.290.910.713.8990mmFrom 1981
FH3.451.941.290.970.763.8990mmup to 07/1980
FH3.451.941.290.910.713.8990mmFrom 1981
FJ3.451.941.290.910.713.8990mmFrom 1981
FM3.452.121.441.130.913.8990mmClose Ratio
FD3.452.121.441.130.913.8990mmClose Ratio
FK3.452.121.441.130.913.8990mmClose Ratio
6G3.451.941.291.290.913.6590mmEuro 08/1982 to 07/1983
7G3.452.121.441.130.913.6590mmClose Ratio Euro 08/1982 to 07/1983
2H3.452.121.441.130.913.9490mmClose Ratio 1983 GTI
4S3.451.941.290.910.753.9490mm1986 to 1990 1.6 Diesel
AOP3.451.941.290.910.753.94100mm1986 to 1990 1.6 Diesel
AGS3.451.941.290.910.753.94100mm1986 to 1990 1.6 Diesel
4T3.451.941.290.910.753.6790mmEuro From 08/1983
8A3.451.941.290.910.753.6790mmEuro From 08/1983
7A3.451.941.290.910.713.9490mmFrom 08/1983
7D3.451.941.250.910.713.9490mm
4K3.452.121.441.130.893.9490mmClose Ratio
4Y3.452.121.441.130.893.6790mmClose Ratio 1.8 8V
9A3.452.121.441.130.893.67100mmClose Ratio 1985 to 1989
AEN3.452.121.441.130.893.67100mmClose Ratio 1985 to 1989
ACD3.452.121.441.130.893.67100mmClose Ratio 1985 to 1989
ACH3.451.941.371.030.753.9490mm1985 1.6 Diesel
AGB3.452.121.441.130.913.67100mmClose Ratio 16V
2Y3.452.121.441.130.913.67100mmClose Ratio 16V
ACN3.451.941.371.030.753.6790mm1.8 8V
AON3.451.941.371.030.753.67100mm1.8 8V
ASF3.451.941.371.030.753.67100mm1.8 8V
ACL3.451.941.371.030.753.67100mm1.8 8V
AUG3.451.941.441.130.893.67100mm1.8 8V 1990 to 1993
DGF3.451.941.441.130.893.671.8 8V 1990 to 1993
DGT3.451.941.441.130.893.671.8 8V 1990 to 1993
AWY3.451.941.441.130.893.9490mm1990 Diesel
AVX3.451.941.290.910.754.2590mm1.6 TD ECO
CHB3.451.941.371.030.853.671.8 From 1993
APW3.451.941.371.030.853.6790mm1.8 From 1993
DFN3.451.941.371.030.853.671.8 From 1993
CHD3.451.941.280.910.753.671.9 TD (75HP) From 1993
DFP3.451.941.280.910.753.671.9 TD (75HP) From 1993
ATH3.451.941.280.910.753.67100mm1.9 TD (75HP) From 1993
CHE3.451.941.280.970.83.67100mm115HP with Large input Shaft from 1993
DFQ3.451.941.280.970.83.67115HP with Large input Shaft from 1993
DGD3.451.941.280.970.83.67115HP with Large input Shaft from 1993
AMC3.451.941.280.970.83.67100mm115HP with Large input Shaft from 1993

Automatic Gearboxes

EQ3 Speed Automatic08/1974 to 02/1984
EV3 Speed Automatic08/1978 to 12/1982
TB3 Speed Automatic08/1980 to 12/1982
TC3 Speed Automatic08/1982 to 09/1982
TE3 Speed Automatic01/1983 to 02/1984
TF3 Speed Automatic08/1982 to 02/1984
TFA3 Speed Automatic01/1983 to 07/1983
TG3 Speed Automatic10/1982 to 02/1984

A “4+E” gear configuration typically refers to a manual transmission with four forward gears plus an additional overdrive gear. The “E” stands for “economy” or “extra,” indicating that the overdrive gear is primarily intended to improve fuel efficiency and reduce engine rpm at cruising speeds.

Here’s a breakdown of how a 4+E manual transmission typically operates:

  1. First Gear: Provides the most torque multiplication for starting from a standstill or climbing steep grades. It offers good acceleration but may result in higher engine rpm at lower speeds.
  2. Second Gear: Used for moderate acceleration and transitioning from a standstill to a higher speed. It offers a balance between torque and speed.
  3. Third Gear: Provides further acceleration and is often used for city driving at moderate speeds.
  4. Fourth Gear: Also known as the overdrive gear, it is designed to reduce engine rpm at cruising speeds, improving fuel efficiency and reducing engine wear. It allows the vehicle to maintain speed with lower engine revolutions per minute (rpm), resulting in quieter operation and better fuel economy on the motorway.
  5. Extra (E) Gear: This is an additional overdrive gear beyond the standard fourth gear. It offers even greater reduction in engine rpm compared to the fourth gear, further optimizing fuel efficiency during motorway cruising.

The inclusion of an overdrive gear, particularly an extra overdrive gear like the “E” gear, is a common feature in manual transmissions designed to improve fuel economy and reduce engine wear during motorway driving. By lowering engine rpm while maintaining speed, overdrive gears help to achieve better fuel efficiency by allowing the engine to operate more efficiently within its optimal rpm range.

A “3+E” gear configuration, similar to the “4+E” setup, typically refers to a manual transmission with three forward gears plus an additional overdrive gear. Again, the “E” stands for “economy” or “extra,” indicating that the overdrive gear is primarily intended to improve fuel efficiency and reduce engine rpm at cruising speeds.

Here’s how a 3+E manual transmission generally operates:

  1. First Gear: Provides high torque multiplication for starting from a standstill or climbing steep grades. It offers strong acceleration but may result in higher engine rpm at lower speeds.
  2. Second Gear: Used for moderate acceleration and transitioning from a standstill to a higher speed. It provides a balance between torque and speed.
  3. Third Gear: Offers further acceleration and is often used for city driving at moderate speeds.
  4. Extra (E) Gear: The overdrive gear, similar to the fourth gear in a 4+E transmission, is designed to reduce engine rpm at cruising speeds. By allowing the engine to operate at lower revolutions per minute (rpm) while maintaining speed, the overdrive gear enhances fuel efficiency and reduces engine wear during motorway driving.

The 3+E configuration is another example of a transmission setup aimed at optimizing fuel efficiency during motorway cruising. It achieves this by providing an additional overdrive gear beyond the standard third gear, allowing for quieter operation and improved fuel economy at sustained speeds.

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