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Gear Ratio Guide

Gear Ratio Guide

The table below covers all 020 transmissions as found in big block (1.5, 1.6, 1.8 and above) Mk1 Golfs. Note that VW also used the 020 transmission on Scirocco, Caddy, Jetta, and continued to use it for most big block Golf Mk2 (not G60? or 4WD) and most (not 16V, VR6 or 4WD) Golf Mk3 too, so you will often find newer and different transmissions.
Note that there are differences which mean they might not be a direct fitment.

The table below, illustrates the gear ratios found inside, and the differences which should be taken into account. Note too, that higher power engine conversions (eg 20vT, G60, 2.0l 16V) can use the 020 transmission if the flywheel and clutch are swapped (match the flywheel/clutch to the gearbox, match the friction disc to the input shaft!)

Code1st2nd3rd4th5thfinal drivetop gear x FDnotesflangesswitchmountinput shaft
GC3.451.941.290.97 3.893.774 speed up to '80??? 
GC,GN3.451.941.280.91 3.893.544 speed from '81??? 
GP,GL3.451.751.060.71 3.892.763+E from '81??? 
GY3.451.751.060.71 4.172.963+E Pick up??? 
FF,FG?,FH3.451.941.290.970.763.892.96Up to 07/8090largestud 
FF,FN,FH,FJ3.451.941.290.910.713.892.76From '8190largestud 
FM,FD,FK3.452.121.441.130.913.893.54Close Ratio90smallstud 
6G3.451.941.291.290.913.653.32Euro 8/82-7/8390largestud 
7G3.452.121.441.130.913.653.32Close Ratio, Euro 8/82-7/8390largestud 
2H3.452.121.441.130.913.943.59Close Ratio '83 GTI90largestud 
4S3.451.941.290.910.753.942.9686-90 1.6 Diesel100largehole 
AGS, AOP3.451.941.290.910.753.942.9686-90 1.6 Diesel100smallhole 
4T,8A3.451.941.290.910.753.672.75Euro From 8/8390largestud 
7A3.451.941.290.910.713.942.80From 8/8390largestud 
4K3.452.121.441.130.893.943.51Close Ratio90largestud 
4Y3.452.121.441.130.893.673.27Close Ratio 1.8 8v90largestud 
9A3.452.121.441.130.893.673.27Close Ratio '85-'89100largehole 
AEN,ACD3.452.121.441.130.893.673.27Close Ratio '85-'89100smallboth 
ACH3.451.941.371.030.753.942.9685-'86 1.6 Diesel90largehole 
2Y3.452.121.441.130.913.673.34Close Ratio,16v100smallboth24mm
AGB3.452.121.441.130.913.673.34Close Ratio,16v100largeboth24mm
ACN, ACL3.451.941.371.030.753.672.751.8 8v100largehole 
AON, ASF3.451.941.371.030.753.672.751.8 8v100smallhole 
AUG,DGF,DGT3.451.941.441.130.893.673.271.8 8v '90-'93100smallhole 
AWY3.451.941.441.130.893.943.51'90 Diesel100smallhole 
AVX3.451.941.290.910.754.253.191.6 TD ECO90smallhole 
CHB,APW,DFN3.451.941.371.030.853.673.12From '93 1.890largehole 
CHD,DFP,ATH3.451.941.280.910.753.672.75From '93 1.9 TD 75hp100smallhole 
CHE,DFQ,AMC3.451.941.280.970.83.672.94From '93 115hp,Large input shaft100smallhole24mm
DGD3.451.941.280.970.83.672.94From '93 115hp100smallhole?

Unless stated, the input shaft is 22mm
Flanges - 90 or 100mm. You can swap flanges between gearboxes if needs be, or fit suitable driveshafts to match the gearbox
Switch - reversing light switch
Mount - the Mk1 uses studs along the edge of the diff housing, the Mk2 uses a hole in the casing. Most Mk2 gearboxes have suitable threads along the diff housing to fit studs, if it doesn't have them in place already.

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