Gearmaster
™Rock crawling Transfer Case Gears
For
Nissan GQ and GU Patrol Transfer Case
Last Updated: 23/11/06
These gears have been designed to directly replace the Nissan Patrol low range transfer case gears as fitted to all models from 1988 on.
The following three Low Range Ratios are now available.
| High Range | No Change remains 1:1 |
| Low Range | 2.484:1 = 24% reduction over standard |
| High Range | No Change remains 1:1 |
| Low Range | 2.86:1 = 43% reduction over standard |
| High Range | No Change remains 1:1 |
| Low Range | 3.743:1 = 85% reduction over standard |
Vehicles Fitted With Larger Tyres
The gears suit all model Nissan GQ and GU transfer cases enhancing the vehicles off road performance and safety. Vehicles fitted with larger tyres to enhance their off road performance are at the same time 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.
Automatic Vehicles
Vehicles fitted with automatic transmissions have very poor engine braking, this is due to the 1st gear ratio being in the order of 2.7 to 3.5:1 and to compound this problem the torque converter can not be locked up in this gear. The 85% gear reduction gives an outstanding improvement to the engine braking and overall drivability of the vehicle. If you own an automatic 4WD vehicle and have taken it off road in a hilly area you would appreciate the improvement in safety and drivability that these gears offer.
If you intend fitting or have fitted a GM engine and automatic transmission to your vehicle you should also consider fitting these transfer case gears to improve your engine braking and general off road performance and safety.
Vehicles Using Winches
When winching your vehicle you often need to give some assistance to the winch by driving the vehicle in 1st gear, however the STD overall ratio moves the vehicle much faster than the winch. This over speed of the vehicle can cause excessive loading on the winch and cable when the vehicle looses traction. The cable can also become crossed up causing premature wear and possible breakage. The lower speed achieved with the Gearmaster® gears means that you can better match the vehicle speed to the winch.
Gear Backlash Eliminator
All late model GQ and GU patrols are fitted with one backlash eliminator on the large end of the lay shaft this is to help prevent low speed gear chatter which is more commonly experienced in vehicles fitted with automatic transmissions. All of our Nissan Gearmaster® gears are now supplied with a new back lash eliminator which is designed to suit the new gear tooth profile.
The transfer case does require a small modification to fit the gears, the installation is relatively simple allowing the job to be undertaken by most mechanical work shops.
2.484:1 Ratio
| High Range | No Change remains 1:1 |
| Low Range | 2.484:1 = 24% reduction over standard |
The following are some examples of gear ratio options:
| GQ Patrols | 1st Gear Ratio | Low Range Ratio | Diff Ratio | Final Drive Ratio |
| GQ 4.2 petrol auto with STD transfer case ratios |
2.787:1 |
2.02:1 |
3.9:1 |
21.955:1 |
| GQ 4.2 petrol auto with Gearmaster transfer case ratios |
2.787:1 |
2.484:1 |
3.9:1 |
27.00:1 |
| GM V8 TH700/4L60E auto with STD transfer ratios |
3.06:1 |
2.02:1 |
3.9:1 |
24.1:1 |
| GM V8 TH700/4L60E auto with Gearmaster transfer ratios |
3.06:1 |
2.484:1 |
3.9:1 |
29.64:1 |
| GQ 4.2 petrol manual with STD transfer case ratios |
4.556:1 |
2.02:1 |
4.11:1 |
37.824:1 |
| GQ 4.2 petrol manual with Gearmaster transfer case ratios |
4.556:1 |
2.484:1 |
4.11:1 |
46.51:1 |
| GM V8 TH700/4L60E auto with STD transfer ratios |
3.06:1 |
2.02:1 |
4.11:1 |
25.4:1 |
| GM V8 TH700/4L60E auto with Gearmaster transfer ratios |
3.06:1 |
2.484:1 |
4.11:1 |
31.23:1 |
| GQ ST 2.8 turbo diesel manual with STD transfer case ratios |
4.061:1 |
2.02:1 |
4.625:1 |
37.94:1 |
| GQ ST 2.8 turbo diesel manual with Gearmaster transfer case ratios |
4.061:1 |
2.484:1 |
4.625:1 |
46.65:1 |
| GM V8 TH700/4L60E auto with STD transfer ratios |
3.06:1 |
2.02:1 |
4.625:1 |
28.588:1 |
| GM V8 TH700/4L60E auto with Gearmaster transfer ratios |
3.06:1 |
2.484:1 |
4.625:1 |
35.15:1 |
| GQ ST 4.2 diesel manual with STD transfer case ratios |
4.262:1 |
2.02:1 |
3.9:1 |
33.576:1 |
| GQ ST 4.2 diesel manual with Gearmaster transfer case ratios |
4.262:1 |
2.484:1 |
3.9:1 |
41.28:1 |
| GM V8 TH700/4L60E auto with STD transfer ratios |
3.06:1 |
2.02:1 |
3.9:1 |
24.1:1 |
| GM V8 TH700/4L60E auto with Gearmaster transfer ratios |
3.06:1 |
2.484:1 |
3.9:1 |
29.64:1 |
| GQ ST 3ltr petrol manual with STD transfer case ratios |
4.061:1 |
2.02:1 |
4.11:1 |
33.715:1 |
| GQ ST 3ltr petrol manual with Gearmaster transfer case ratios |
4.061:1 |
2.484:1 |
4.11:1 |
41.46:1 |
| GM V8 TH700/4L60E auto with STD transfer ratios |
3.06:1 |
2.02:1 |
4.11:1 |
25.4:1 |
| GM V8 TH700/4L60E auto with Gearmaster transfer ratios |
3.06:1 |
2.484:1 |
4.11:1 |
31.23:1 |
| GU Patrols | ||||
| GU EFI 4.5 petrol manual with STD transfer case ratios |
4.262:1 |
2.02:1 |
4.11:1 |
35.383:1 |
| GU EFI 4.5 petrol manual with Gearmaster transfer case ratios |
4.262:1 |
2.484:1 |
4.11:1 |
43.51:1 |
| GU EFI 4.5 petrol auto with STD transfer case ratios |
4.11:1 |
|||
| GM V8 TH700/4L60E auto with STD transfer ratios |
3.06:1 |
2.02:1 |
4.11:1 |
25.4:1 |
| GM V8 TH700/4L60E auto with Gearmaster transfer ratios |
3.06:1 |
2.484:1 |
4.11:1 |
31.23:1 |
| GU 4.2 diesel manual with STD transfer case ratios |
4.556:1 |
2.02:1 |
4.11:1 |
37.824:1 |
| GU 4.2 diesel manual with Gearmaster transfer case ratios |
4.556:1 |
2.484:1 |
4.11:1 |
46.51:1 |
| GM V8 TH700/4L60E auto with STD transfer ratios |
3.06:1 |
2.02:1 |
4.11:1 |
25.4:1 |
| GM V8 TH700/4L60E auto with Gearmaster transfer ratios |
3.06:1 |
2.484:1 |
4.11:1 |
31.23:1 |
| GU 4.2 turbo diesel manual with STD transfer case ratios |
4.262:1 |
2.02:1 |
3.9:1 |
33.57:1 |
| GU 4.2 turbo diesel manual with Gearmaster transfer case ratios |
4.262:1 |
2.484:1 |
3.9:1 |
41.29:1 |
| GM V8 TH700/4L60E auto with STD transfer ratios |
3.06:1 |
2.02:1 |
3.9:1 |
24.1:1 |
| GM V8 TH700/4L60E auto with Gearmaster transfer ratios |
3.06:1 |
2.484:1 |
3.9:1 |
29.64:1 |
| GU 3.0 turbo diesel manual with STD transfer case ratios |
4.262:1 |
2.02:1 |
4.375:1 |
37.66:1 |
| GU 3.0 turbo diesel manual with Gearmaster transfer case ratios |
4.262:1 |
2.484:1 |
4.375:1 |
46.31:1 |
| GU 3.0 turbo diesel auto with STD transfer case ratios |
2.784:1 |
2.02:1 |
4.375:1 |
24.6:1 |
| GU 3.0 turbo diesel auto with Gearmaster transfer case ratios |
2.784:1 |
2.484:1 |
4.375:1 |
30.25:1 |
| GU 4.8 petrol manual with STD transfer case ratios |
4.085:1 |
2.02:1 |
4.375:1 |
36.10:1 |
| GU 4.8 petrol manual with Gearmaster transfer case ratios |
4.085:1 |
2.484:1 |
4.375:1 |
44.39:1 |
| GU 4.8 petrol auto with STD transfer case ratios |
3.54:1 |
2.02:1 |
3.545:1 |
25.35:1 |
| GU 4.8 petrol auto with Gearmaster transfer case ratios |
3.54:1 |
2.484:1 |
3.545:1 |
31.17:1 |
| GU Cab Chassis Models (2003) | ||||
| GU 4.2 turbo diesel manual with STD transfer case ratios |
4.262:1 |
2.02:1 |
4.11:1 |
35.38:1 |
| GU 4.2 turbo diesel manual with Gearmaster transfer case ratios |
4.262:1 |
2.484:1 |
4.11:1 |
43.50:1 |
Part Number is as follows:
| 2.484:1 low range Gear set to suit Nissan GQ and GU Patrol transfer case all models. | ||
|
PART NO. MFK1515/2.48L
RRP AU$1250 inc GST The kit consists of: New input gear, idler gear, output gear, bearing spacer, welsh plug, backlash eliminator, and instructions.
|
||
2.86:1 Ratio
| High Range | No Change remains 1:1 |
| Low Range | 2.86:1 = 43% reduction over standard |
The following are some examples of gear ratio options:
| GQ Patrols | 1st Gear Ratio | Low Range Ratio | Diff Ratio | Final Drive Ratio |
| GQ 4.2 petrol auto with STD transfer case ratios |
2.787:1 |
2.02:1 |
3.9:1 |
21.955:1 |
| GQ 4.2 petrol auto with Gearmaster transfer case ratios |
2.787:1 |
2.86:1 |
3.9:1 |
31.09:1 |
| GM V8 TH700/4L60E auto with STD transfer ratios |
3.06:1 |
2.02:1 |
3.9:1 |
24.1:1 |
| GM V8 TH700/4L60E auto with Gearmaster transfer ratios |
3.06:1 |
2.86:1 |
3.9:1 |
34.13:1 |
| GQ 4.2 petrol manual with STD transfer case ratios |
4.556:1 |
2.02:1 |
4.11:1 |
37.824:1 |
| GQ 4.2 petrol manual with Gearmaster transfer case ratios |
4.556:1 |
2.86:1 |
4.11:1 |
53.55:1 |
| GM V8 TH700/4L60E auto with STD transfer ratios |
3.06:1 |
2.02:1 |
4.11:1 |
25.4:1 |
| GM V8 TH700/4L60E auto with Gearmaster transfer ratios |
3.06:1 |
2.86:1 |
4.11:1 |
35.97:1 |
| GQ ST 2.8 turbo diesel manual with STD transfer case ratios |
4.061:1 |
2.02:1 |
4.625:1 |
37.94:1 |
| GQ ST 2.8 turbo diesel manual with Gearmaster transfer case ratios |
4.061:1 |
2.86:1 |
4.625:1 |
53.70:1 |
| GM V8 TH700/4L60E auto with STD transfer ratios |
3.06:1 |
2.02:1 |
4.625:1 |
28.588:1 |
| GM V8 TH700/4L60E auto with Gearmaster transfer ratios |
3.06:1 |
2.86:1 |
4.625:1 |
40.48:1 |
| GQ ST 4.2 diesel manual with STD transfer case ratios |
4.262:1 |
2.02:1 |
3.9:1 |
33.576:1 |
| GQ ST 4.2 diesel manual with Gearmaster transfer case ratios |
4.262:1 |
2.86:1 |
3.9:1 |
47.54:1 |
| GM V8 TH700/4L60E auto with STD transfer ratios |
3.06:1 |
2.02:1 |
3.9:1 |
24.1:1 |
| GM V8 TH700/4L60E auto with Gearmaster transfer ratios |
3.06:1 |
2.86:1 |
3.9:1 |
34.13:1 |
| GQ ST 3ltr petrol manual with STD transfer case ratios |
4.061:1 |
2.02:1 |
4.11:1 |
33.715:1 |
| GQ ST 3ltr petrol manual with Gearmaster transfer case ratios |
4.061:1 |
2.86:1 |
4.11:1 |
47.74:1 |
| GM V8 TH700/4L60E auto with STD transfer ratios |
3.06:1 |
2.02:1 |
4.11:1 |
25.4:1 |
| GM V8 TH700/4L60E auto with Gearmaster transfer ratios |
3.06:1 |
2.86:1 |
4.11:1 |
35.97:1 |
| GU Patrols | ||||
| GU EFI 4.5 petrol manual with STD transfer case ratios |
4.262:1 |
2.02:1 |
4.11:1 |
35.383:1 |
| GU EFI 4.5 petrol manual with Gearmaster transfer case ratios |
4.262:1 |
2.86:1 |
4.11:1 |
50.01:1 |
| GU EFI 4.5 petrol auto with STD transfer case ratios |
4.11:1 |
|||
| GM V8 TH700/4L60E auto with STD transfer ratios |
3.06:1 |
2.02:1 |
4.11:1 |
25.4:1 |
| GM V8 TH700/4L60E auto with Gearmaster transfer ratios |
3.06:1 |
2.86:1 |
4.11:1 |
35.97:1 |
| GU 4.2 diesel manual with STD transfer case ratios |
4.556:1 |
2.02:1 |
4.11:1 |
37.824:1 |
| GU 4.2 diesel manual with Gearmaster transfer case ratios |
4.556:1 |
2.86:1 |
4.11:1 |
53.55:1 |
| GM V8 TH700/4L60E auto with STD transfer ratios |
3.06:1 |
2.02:1 |
4.11:1 |
25.4:1 |
| GM V8 TH700/4L60E auto with Gearmaster transfer ratios |
3.06:1 |
2.86:1 |
4.11:1 |
35.97:1 |
| GU 4.2 turbo diesel manual with STD transfer case ratios |
4.262:1 |
2.02:1 |
3.9:1 |
33.57:1 |
| GU 4.2 turbo diesel manual with Gearmaster transfer case ratios |
4.262:1 |
2.86:1 |
3.9:1 |
47.54:1 |
| GM V8 TH700/4L60E auto with STD transfer ratios |
3.06:1 |
2.02:1 |
3.9:1 |
24.1:1 |
| GM V8 TH700/4L60E auto with Gearmaster transfer ratios |
3.06:1 |
2.86:1 |
3.9:1 |
34.13:1 |
| GU 3.0 turbo diesel manual with STD transfer case ratios |
4.262:1 |
2.02:1 |
4.375:1 |
37.66:1 |
| GU 3.0 turbo diesel manual with Gearmaster transfer case ratios |
4.262:1 |
2.86:1 |
4.375:1 |
53.33:1 |
| GU 3.0 turbo diesel auto with STD transfer case ratios |
2.784:1 |
2.02:1 |
4.375:1 |
24.6:1 |
| GU 3.0 turbo diesel auto with Gearmaster transfer case ratios |
2.784:1 |
2.86:1 |
4.375:1 |
34.84:1 |
| GU 4.8 petrol manual with STD transfer case ratios |
4.085:1 |
2.02:1 |
4.375:1 |
36.10:1 |
| GU 4.8 petrol manual with Gearmaster transfer case ratios |
4.085:1 |
2.86:1 |
4.375:1 |
51.11:1 |
| GU 4.8 petrol auto with STD transfer case ratios |
3.54:1 |
2.02:1 |
3.545:1 |
25.35:1 |
| GU 4.8 petrol auto with Gearmaster transfer case ratios |
3.54:1 |
2.86:1 |
3.545:1 |
35.89:1 |
| GU Cab Chassis Models (2003) | ||||
| GU 4.2 turbo diesel manual with STD transfer case ratios |
4.262:1 |
2.02:1 |
4.11:1 |
35.38:1 |
| GU 4.2 turbo diesel manual with Gearmaster transfer case ratios |
4.262:1 |
2.86:1 |
4.11:1 |
50.10:1 |
Part Number is as follows:
| 2.86:1 low range Gear set to suit Nissan GQ and GU Patrol transfer case all models. | ||
|
PART NO. MFK1515/2.86L
RRP AU$1250 inc GST The kit consists of: New input gear, idler gear, output gear, bearing spacer, welsh plug, backlash eliminator, and instructions. Looks the same as the MFK1515 set above. |
||
3.743:1 Ratio
| High Range | No Change remains 1:1 |
| Low Range | 3.743:1 = 85% reduction over standard |
The following are some examples of gear ratio options:
| GQ Patrols | 1st Gear Ratio | Low Range Ratio | Diff Ratio | Final Drive Ratio |
| GQ 4.2 petrol auto with STD transfer case ratios |
2.787:1 |
2.02:1 |
3.9:1 |
21.955:1 |
| GQ 4.2 petrol auto with Gearmaster transfer case ratios |
2.787:1 |
3.743:1 |
3.9:1 |
40.683:1 |
| GM V8 TH700/4L60E auto with STD transfer ratios |
3.06:1 |
2.02:1 |
3.9:1 |
24.1:1 |
| GM V8 TH700/4L60E auto with Gearmaster transfer ratios |
3.06:1 |
3.743:1 |
3.9:1 |
44.668:1 |
| GQ 4.2 petrol manual with STD transfer case ratios |
4.556:1 |
2.02:1 |
4.11:1 |
37.824:1 |
| GQ 4.2 petrol manual with Gearmaster transfer case ratios |
4.556:1 |
3.743:1 |
4.11:1 |
70.088:1 |
| GM V8 TH700/4L60E auto with STD transfer ratios |
3.06:1 |
2.02:1 |
4.11:1 |
25.4:1 |
| GM V8 TH700/4L60E auto with Gearmaster transfer ratios |
3.06:1 |
3.743:1 |
4.11:1 |
47.07:1 |
| GQ ST 2.8 turbo diesel manual with STD transfer case ratios |
4.061:1 |
2.02:1 |
4.625:1 |
37.94:1 |
| GQ ST 2.8 turbo diesel manual with Gearmaster transfer case ratios |
4.061:1 |
3.743:1 |
4.625:1 |
70.30:1 |
| GM V8 TH700/4L60E auto with STD transfer ratios |
3.06:1 |
2.02:1 |
4.625:1 |
28.588:1 |
| GM V8 TH700/4L60E auto with Gearmaster transfer ratios |
3.06:1 |
3.743:1 |
4.625:1 |
52.972:1 |
| GQ ST 4.2 diesel manual with STD transfer case ratios |
4.262:1 |
2.02:1 |
3.9:1 |
33.576:1 |
| GQ ST 4.2 diesel manual with Gearmaster transfer case ratios |
4.262:1 |
3.743:1 |
3.9:1 |
62.215:1 |
| GM V8 TH700/4L60E auto with STD transfer ratios |
3.06:1 |
2.02:1 |
3.9:1 |
24.1:1 |
| GM V8 TH700/4L60E auto with Gearmaster transfer ratios |
3.06:1 |
3.743:1 |
3.9:1 |
44.668:1 |
| GQ ST 3ltr petrol manual with STD transfer case ratios |
4.061:1 |
2.02:1 |
4.11:1 |
33.715:1 |
| GQ ST 3ltr petrol manual with Gearmaster transfer case ratios |
4.061:1 |
3.743:1 |
4.11:1 |
62.473:1 |
| GM V8 TH700/4L60E auto with STD transfer ratios |
3.06:1 |
2.02:1 |
4.11:1 |
25.4:1 |
| GM V8 TH700/4L60E auto with Gearmaster transfer ratios |
3.06:1 |
3.743:1 |
4.11:1 |
47.07:1 |
| GU Patrols | ||||
| GU EFI 4.5 petrol manual with STD transfer case ratios |
4.262:1 |
2.02:1 |
4.11:1 |
35.383:1 |
| GU EFI 4.5 petrol manual with Gearmaster transfer case ratios |
4.262:1 |
3.743:1 |
4.11:1 |
65.565:1 |
| GU EFI 4.5 petrol auto with STD transfer case ratios |
4.11:1 |
|||
| GM V8 TH700/4L60E auto with STD transfer ratios |
3.06:1 |
2.02:1 |
4.11:1 |
25.4:1 |
| GM V8 TH700/4L60E auto with Gearmaster transfer ratios |
3.06:1 |
3.743:1 |
4.11:1 |
47.07:1 |
| GU 4.2 diesel manual with STD transfer case ratios |
4.556:1 |
2.02:1 |
4.11:1 |
37.824:1 |
| GU 4.2 diesel manual with Gearmaster transfer case ratios |
4.556:1 |
3.743:1 |
4.11:1 |
70.088:1 |
| GM V8 TH700/4L60E auto with STD transfer ratios |
3.06:1 |
2.02:1 |
4.11:1 |
25.4:1 |
| GM V8 TH700/4L60E auto with Gearmaster transfer ratios |
3.06:1 |
3.743:1 |
4.11:1 |
47.07:1 |
| GU 4.2 turbo diesel manual with STD transfer case ratios |
4.262:1 |
2.02:1 |
3.9:1 |
33.57:1 |
| GU 4.2 turbo diesel manual with Gearmaster transfer case ratios |
4.262:1 |
3.743:1 |
3.9:1 |
62.22:1 |
| GM V8 TH700/4L60E auto with STD transfer ratios |
3.06:1 |
2.02:1 |
3.9:1 |
24.1:1 |
| GM V8 TH700/4L60E auto with Gearmaster transfer ratios |
3.06:1 |
3.743:1 |
3.9:1 |
44.67:1 |
| GU 3.0 turbo diesel manual with STD transfer case ratios |
4.262:1 |
2.02:1 |
4.375:1 |
37.66:1 |
| GU 3.0 turbo diesel manual with Gearmaster transfer case ratios |
4.262:1 |
3.743:1 |
4.375:1 |
69.79:1 |
| GU 3.0 turbo diesel auto with STD transfer case ratios |
2.784:1 |
2.02:1 |
4.375:1 |
24.6:1 |
| GU 3.0 turbo diesel auto with Gearmaster transfer case ratios |
2.784:1 |
3.743:1 |
4.375:1 |
45.59:1 |
| GU 4.8 petrol manual with STD transfer case ratios |
4.085:1 |
2.02:1 |
4.375:1 |
36.10:1 |
| GU 4.8 petrol manual with Gearmaster transfer case ratios |
4.085:1 |
3.743:1 |
4.375:1 |
66.89:1 |
| GU 4.8 petrol auto with STD transfer case ratios |
3.54:1 |
2.02:1 |
3.545:1 |
25.35:1 |
| GU 4.8 petrol auto with Gearmaster transfer case ratios |
3.54:1 |
3.743:1 |
3.545:1 |
46.97:1 |
| GU Cab Chassis Models (2003) | ||||
| GU 4.2 turbo diesel manual with STD transfer case ratios |
4.262:1 |
2.02:1 |
4.11:1 |
35.38:1 |
| GU 4.2 turbo diesel manual with Gearmaster transfer case ratios |
4.262:1 |
3.743:1 |
4.11:1 |
65.56:1 |
Part Number is as follows:
| 3.743:1 low range Gear set to suit Nissan GQ and GU Patrol transfer case all models. | ||
|
PART NO. MFK1515
RRP AU$1250 inc GST The kit consists of: New input gear, idler gear, output gear, bearing spacer, welsh plug, backlash eliminator, and instructions. |
||
Copyright © 2006
Marks 4WD Adaptors 
Last modified:
November 24, 2006