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Option 1: 1:1 6th gear.

Option 2: 1:1 5th gear with an overdrive 6th.

Gear ratios are to customer specifications using the ratio chart. Gear engagement is performed by non-synchronised face dogs.

* Gear change is performed by using the standard gear lever and mechanism.

* The gear lever is pulled back for up changes and push forward for down changes.

* Neutral is selected from the 1st gear position moving the gear lever

* Reverse is selected from the neutral position by moving the gear lever forward. From the reverse lever position neutral is selected by pulling the gear lever back and 1st is selected by pulling the gear lever back again.

This system prevents neutral or reverse being accidentally selected when in the forward gear pattern.

An electronic gear position indicator is supplied as standard.

The input shaft, main shaft and lay shaft are mounted on Timken tapered roller bearings straddling 3rd, 4th, 5th and constant mesh gears. Preload is easily adjusted with spacers behind the clutch housing.

First and second gears are in the rear housing with the main extremities of the shafts supported by needle bearings. When a gear is selected the gear and bearing rotate with the main shaft as an assembly.

Heat treated nickel chrome steel is used for all gears and shafts. Selector shafts are aluminium bronze. Castings are cast LM25 aluminium alloy, heat-treated to T6 specifications.

Clutch splines are normally 1 1/8"x 26, 24/48DP, 30° P.A., but can be ordered with standard Nissan splines. The gearbox weight is 46 kgs.