TOYOTA GEARBOX/TRANSFER Ratios

[RUFF]

Here is how to calculate your overall crawl ratio.
It's a simple formula.

Multiply your first gear, times your low range transfer case gear, times your differential gear. For example if you have:
3.93 first gear in your transmission
2.28 low range gear in your transfer case
4.10 gears in your differentials
Your crawl ratio is 3.93 X 2.28 X 4.10 = 37:1

If you have two transfer cases then you also multiply the number by the second case like this:

3.93 first gear in your transmission
2.28 low range gear in your first transfer case
4.70 low range gear in your second transfer case
5.29 gears in your differentials
Your crawl ratio is 3.93 X 2.28 X 4.70 X 2.29 = 223:1

Below is a list of gear ratios in popular Toyota Transmissions and Transfer cases to make it easy for you to figure your exact crawl ratio.

Land Cruiser Transmissions
J30 3 speed 1959 - 9/73 2.75
H41 U.S Type 4 speed 9/73 - 9/90 3.55
H41 4 speed 9/73 - 9/90 4.93
H42 4 speed 9/80 - 9/87 3.55

Land Cruiser Transfer Case
2 speed part time case made by Asco
58 - 63 No low range
64 - 9/73 2.31
9/73 - 4/75 1.99
4/75 - 7/80 1.96
8/80 - 8/87 2.28

Hilux and 4Runner/Surf Transmissions
L43 4 speed 79 - 80 3.67
L45 4 speed 81 - 82 3.93
L50 5 speed 81 - 82 3.93
L52 5 speed 83 3.93
G52 & G54 5 speed 84 - 88 (Carb) 3.93
W56 5 speed 85 - 95 (EFI) 3.95
R151F 5 speed 86 - 87 (turbo only) 4.31
G58 5 speed 89 - 95 3.93
R150F (6 cyl) 5 speed 88+ 3.83

Pickup and 4Runner/Surf Transfer Cases
All V6 4runners use the chain drive tcase and have a 2.57 low range gear. Most 4 Cylinder hilux's and 4runners use a gear drive t/case with a 2.28 low range. However some 4 cyl 4runners/surfs and late IFS hilux's use the V6 style chain drive case. The best way to find out what type you have is to look under your truck and cound the bolts holding the rear cover in place.

If you have 7 bolts in the rear cover then you have the gear driven unit.
If you have 5 bolts holding the rear cover then you have the chain drive unit.

Hilux and 4runner T Case Ratios
4 cyl (most) RF1A 79 - 95 2.28
V6 (all) VF1A 87+ 2.57

Ps; All this info is from the Marlin Crawler Site http://www.marlincrawler.com But has been changed slightly to suit what we in australia know our vehicles as.

[bj on roids]

local H41s are 4.89 not 4.91

there is a 4.91 and a 5.2 option, but RARE

[POS]

NOW THATS SOME USEFULL INFO, good work Ruff!