Toyota Land Rover LT230Q Transfer Gearbox PDF Overhaul Manual

Introduction
The LT230Q transfer box is mounted at the rear of the main gearbox and transmits drive to the front and rear axles via the propeller shafts. The LT230Q, whilst similar to the LT230T differs mainly in the following areas:
Helix angle of gears increased to 31° together with an increase in the number of gear teeth thus giving quieter running and an increase in power
transmission efficiency. Increased length mainshaft input gears together with increased thickness bearing housing and repositioned bearing.
Redesigned intermediate gear bearings. Redesigned high gear bush giving quieter running.

Construction
The transfer box comprises three main assemblies, the main casing, front output housing and rear output housing. The main casing carries the mainshaft input gear, the intermediate gears and the differential together
with the high/low range gears, selector shaft and fork. The front output housing carries the front output shaft and flange, high/low cross shaft, housing and selector and the differential lock selector shaft and fork. A dog clutch on the front output shaft is operated by the differential lock selector fork to engage/disengage the differential lock.

The rear output housing carries the output shaft and flange and the speedometer drive and driven gears. A mechanically operated transmission brake is attached to the housing, the brake drum being
attached to the output flange. All housings and cover plates are sealed to the main casing by sealant; mud and water ingress being prevented by mud shields and throwers located at each end of the output housings and on the output flanges. Mainshaft input gear The bevel gearbox output shaft is splined into the mainshaft input gear which is supported by taper roller bearings. Input gear bearing pre-load is achieved by the use of a selective shim located in the bearing housing. An additional power take-off gear is located at the rear of the input gear for certain applications.

Download Toyota Land Rover LT230Q Transfer Gearbox PDF Overhaul Manual