Gearmaster
™Cruiser Crawler®
Rock crawling Transmission
For
Toyota Land Cruiser
Last Updated: 03/07/09
| 78/79/80 series all models fitted with HF1A and HF2A transfer cases | Now available |
| 100 series (live front axle only) | Now available |
|
The crawler transmission vastly enhances the vehicles off road performance
and safety.
Vehicles fitted with larger tyres to enhance their off road performance are at the same time are handicapped by this improvement as the increased tyre diameter reduces the engine braking on steep descents. The increased tyre diameter also increases the speed of the vehicle in all gears making steep ascents and rocky terrain difficult to traverse safely. If you intend fitting or have fitted a GM engine and automatic transmission to your vehicle you should also consider fitting the Gearmaster transfer case gears or the crawler transmission to improve your engine braking and general off road performance. |
| High Range Ratio | No Change remains 1:1 |
| Low Range Ratio | 2.488:1 = standard |
| Crawler Ratio | 3.05:1 = 23% reduction over standard |
| Low Range & Crawler Ratio Combined | 7.588:1 = 205% reduction over standard |
The following are some examples of gear ratios before and after fitting a Cruiser Crawler Transmission:
| 78/79, 80 and 100 series fitted with H151F 5-speed gearbox, HF2A Transfer Case | 1st Gear Ratio | Final T/Case Ratio | Diff Ratio | Final Drive Ratio |
| 5-Speed with STD Low engaged |
4.081:1 |
2.488:1 |
4.10:1 |
41.63:1 |
| 5-Speed with Gearmaster Cruiser Crawler engaged |
4.081:1 |
3.05:1 |
4.10:1 |
51.03:1 |
| 5-Speed with STD Low & Gearmaster Cruiser Crawler engaged |
4.081:1 |
7.59:1 |
4.10:1 |
127:1 |
| 80 and 100 series fitted with A440F automatic transmission | ||||
| 4-Speed Auto (A440F) with STD Low engaged |
2.95:1 |
2.488:1 |
4.10:1 |
30.09:1 |
| 4-Speed Auto (A440F) with Gearmaster Cruiser Crawler engaged |
2.95:1 |
3.05:1 |
4.10:1 |
36.89:1 |
| 4-Speed Auto (A440F) with STD Low & Gearmaster Cruiser Crawler engaged |
2.95:1 |
7.59:1 |
4.10:1 |
91.80:1 |
| 80 and 100 series fitted with A750F automatic transmission | ||||
| 5-Speed Auto (A750F) with STD Low engaged |
3.52:1 |
2.488:1 |
4.10:1 |
35.91:1 |
| 5-Speed Auto (A750F) with Gearmaster Cruiser Crawler engaged |
3.52:1 |
3.05:1 |
4.10:1 |
44.02:1 |
| 5-Speed Auto (A750F) with STD Low & Gearmaster Cruiser Crawler engaged |
3.52:1 |
7.59:1 |
4.10:1 |
109.54:1 |
| 100 series fitted with A750F automatic transmission | ||||
| 5-Speed Auto (A750F) with STD Low engaged |
3.52:1 |
2.488:1 |
3.909:1 |
34.23:1 |
| 5-Speed Auto (A750F) with Gearmaster Cruiser Crawler engaged |
3.52:1 |
3.05:1 |
3.909:1 |
41.97:1 |
| 5-Speed Auto (A750F) with STD Low & Gearmaster Cruiser Crawler engaged |
3.52:1 |
7.59:1 |
3.909:1 |
104.44:1 |
| 100 series fitted with H151F 5-speed gearbox | ||||
| 5-Speed with STD Low engaged |
4.081:1 |
2.488:1 |
4.30:1 |
43.66:1 |
| 5-Speed with Gearmaster Cruiser Crawler engaged |
4.081:1 |
3.05:1 |
4.30:1 |
53.52:1 |
| 5-Speed with STD Low & Gearmaster Cruiser Crawler engaged |
4.081:1 |
7.59:1 |
4.30:1 |
133.19:1 |
| 78/79 series fitted with H150F 5-speed gearbox, HF1A Transfer Case | ||||
| 5-Speed with STD Low engaged |
4.529:1 |
2.488:1 |
4.10:1 |
46.20:1 |
| 5-Speed with Gearmaster Cruiser Crawler engaged |
4.529:1 |
3.05:1 |
4.10:1 |
56.64 |
| 5-Speed with STD Low & Gearmaster Cruiser Crawler engaged |
4.529:1 |
7.59:1 |
4.10:1 |
140.94:1 |
Part Numbers is as follows:
Copyright © 2006
Marks 4WD Adaptors
Last modified:
July 03, 2009