fredag den 13. november 2020

The history of Land Rover LT95 gearboxes.

Land Rover had been developing wonderful machines with brilliantly and purposefully engineered gearboxes since ages, this we all know, but what we don’t know is the history of these gearboxes. So here is some rough history of some of JLR’s main gearboxes. What is meant by LT 95? In the early days, when Land Rover designed the new Range Rover and 101 V8s, they desperately needed a stronger gearbox, so their engineering team developed the LT 95. As a part of British Leyland at that time, Land Rover’s gearbox was given the name Leyland Transmission or LT and “95” was the distance in mm between the main and lay shafts. What kind of gearbox is LT 95? The LT 95 was the most robust gearbox with four-speed having the transfer case built into the same enclosure. The best part about this gearbox was that it offered a number of transfer case ratios, so to eliminating the need of pulling out the gearbox to change the ratios. What were the applications of LT 95? Through 1983, this gearbox was used on Range Rover’s all models of 109 Stage 1 V8, all 101 and on 1983 and 1984’s V8 Nineties and One Tens. The unit used in the early RR or 110 V8s was different from the LT 95 used in 101. The biggest difference they had was the shorter bell housing and input shaft, and a pretty tall high ratio gear. Because of the remote gear linkage in the 101, the gear on the top of the gearbox is very short. A modification to the gear shift lever is required if you are putting this gearbox into a different Land Rover, or you will have to source one from an early Range Rover or 110 V8. LT 95 is powering both axles all the time as it has a central differential, which can be locked using a vacuum actuator. But a vacuum line is required to be run from the engine if you want to use the vacuum actuator. What kind of engine oil does it use? For both, the gearbox and transfer case, the LT 95 uses 20/50 engine oil.

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