4 Speed Overdrive Kit [OEM DA3338]

4 Speed Overdrive Kit

Product Code: DA3338
Brand: OEM

Additional Information

GARAGE THERAPY OVERDRIVE - 4-SPEED (LT95) KIT

Code: DA3338

• Range Rover Classic 1970-1983

The kit includes: 
> GT-LT95 overdrive 
> 2 piece LT95 coupling 
> Coupling spacer 
> Finned transfer case cover and gasket 
> Digital temperature gauge kit including 2 sensors 
> Overdrive selector kit
> Installation manual

It has been specifically designed to fit the restricted space of the 1970 - 1983 Range Rover Classic that use the Rover LT95 gearbox. Comes with everything required to complete the installation. 
Because the overdrive has been designed to fit onto the PTO flange area of the Land Rover LT95 gearbox, you can enjoy the 28% overdrive in any gear, including reverse, and in high or low range.  

Garage Therapy have worked closely with Global Roamer Corporation of Canada to develop a robust overdrive that will allow you to enjoy quieter, more fuel-efficient cruising on motorways and the ability to split every gear while towing heavy loads. It also allows you to overdrive all gears in low range, reducing engine noise and wear on those long sandy tracks and beaches. 

The GT-LT95 overdrive takes advantage of Global Roamer’s legendary epicyclic gear train technology as used in their Roamerdrive overdrives. Also known as planetary gear sets, they are well known for their strength and silent operation. Global Roamer Corporation has a worldwide population of many thousands of overdrives using this very same bullet-proof technology. 

Many of the older style ‘layshaft’ overdrive units suffered badly from a lack of lubrication. The GT-LT95 is designed to be open to the transfer case and utilises an innovative lubrication system which directs transfer case oil through the overdrive gearbox and back to the transfer case via a large deep groove ball bearing. 

As with all gearboxes, lubrication failure due to excessive heat, lack of supply, or both, is to be avoided at all costs. To handle the extra heat generated by the overdrive gearbox, a finned transfer case cover is included which doubles the heat rejection compared to the standard cover. If even more cooling is required for high speed, high load in hot climates, the cover has ports for an optional oil cooler and manual temperature sensor.  

To assist this, an accurate digital temperature gauge is supplied. This very clever gauge uses simple lug style sensors that can monitor both engine and gearbox temperature. Unlike traditional sensors, they operate independent of oil level. It even has an optional exhaust gas temperature thermocouple available; perfect for turbocharged applications. Not only does the gauge have simple to understand icons that change colour if safe limits are exceeded, it also has a series of audible alarms so you never miss that vital warning.