Toyota K transmission

Toyota Motor Corporation's K family is a series of 4 and 5-speed light/medium-duty transmissions found in Toyota Corollas and Starlets.

K40

Oil capacity: 3.0 imp pints
Synchromesh on all Forward gears
Ratios:

First Gear: 3.769:1
Second Gear: 2.250:1
Third Gear: 1.405:1
Fourth Gear: 1.010:1
Reverse Gear: 4.316:1

Applications:

Most 4-speed RWD Starlets and Corollas with K-series engines
KM20 series LiteAces that were fitted with K-series engines had a standard K40 fitted with a column shifter
Toyota Racing Development** has produced a fourth gear closer to third in Ratio

K50/K51

Oil capacity:4.2 Imp pints
Synchromesh on all Forward Gears
Ratios :

First Gear: 3.789:1
Second Gear: 2.220:1
Third Gear: 1.435:1
Fourth Gear: 1.000:1
Fifth Gear: 0.865:1
Reverse gear: 4.316:1

or

First Gear: 3.789:1
Second Gear: 2.124:1
Third Gear: 1.323:1
Fourth Gear: 1.000:1
Fifth Gear: 0.865:1
Reverse gear: 4.316:1

or
TRD GEAR SETS
TRD also sold a close ratio gear sets in the 70's and 80's for the K-50 with the following ratio:

1st: 2.695
2nd: 1.619
3rd: 1.235
4th: 1.000
5th: 0.892

Applications:

Most 5-speed RWD Starlets and Corollas with K-series engines.
1986 Corolla with 3A-U and 4A-U engines.
KM20 series LiteAces were fitted with K50 transmissions to 4K and 5K engines as an option, and to the 7K as standard.