LT77

xj6 gearbox 

sd1 gearbox

The LT77 is quite particular about the oil that is used. but the best oil  used is Redline MTL. It is a fully synthetic with friction properties designed especially for gear syncros and synchro engagement is really good.RED LINE MTL and MT- 90 are designed to provide excellent protection and improved shiftability for manual transmissions and transaxles. MTL and MT- 90 have cured the problem of hard shifting in numerous transmissions which have notoriously difficult shifting. The secret to their success is two - fold. First, they have the appropriate coefficient of friction for most manual transmission synchronizers. Many gear oils, engine oils, and ATFs are too slippery for proper synchro engagement. Secondly, the viscosity characteristics of MTL and MT - 90 allow proper shifting over the entire temperature range which the transmission will experience. The synthetic base oils used have a very high viscosity index which provides relatively constant viscosity as temperature changes. MTL is a low 75W, almost a 70W, at very low temperatures and a high 80W, nearly an 85W, at elevated temperatures, providing adequate viscosity to prevent wear and deaden gear noise. MT - 90 is a thicker 75W90 version of MTL. The shear stability and oxidation stability of these products are excellent, thus the physical characteristics of Red Line MTL and MT-90 will change little with use.
Red Line MTL is classified as a 75W/80W gear lubricant satisfying the API Service requirements of GL - 3 and GL - 4. MTL also satisfies motor oil viscosities SAE 5W/10W/30, and the viscosity requirements for ATF's. MT - 90 is a 75W90 GL - 4 and also satisfies motor oil viscosities SAE 10W/15W/40. The additive chemistry used is non - corrosive, so even though they will provide GL - 4 performance, they will not corrode synchros or bushings. Because of its low corrosivity, Red Line MTL and MT - 90 could also be used in transmissions requiring GL - 1 or GL - 3 lubricants. Seal compatibility is designed to be similar to petroleum-based lubricants.  Maximises transmission life: Extremely shear stable viscosity index improver resists break down under the high shear stresses of modern transmissions, ensuring that oil viscosity and film thickness are sufficient for effective protection of gears against wear and scuffing. Proprietary antiwear and extreme pressure additives provide the load carrying capacity necessary to minimise wear of transmission components under all conditions. The new additive used in the NEO 7W shows virtually no change in grade even after 50,000 miles of operation in automotive transmissions. Further, it has inherently higher film strength than petroleum lubricants, thereby providing added protection to the bearings and gears. An anti-foaming additive assures that the film strength will not be compromised. Reduced Friction: NEO 7W Transmission Oil has an extremely low coefficient of friction, which means cooler running gear boxes. The reduced friction and cooler running combine to extend gearbox life, and also the life of the lubricant. Easier Cold Weather Shifting: The lower pour point temperature of the synthetic means better operation at lower temperatures, and better protection for gears and bearings upon initial startup at the lower temperature. Corrosion Resistance: The synthetic base stock does not break down into unwanted components and form corrosive compounds under the stress of high heat. The additive package works synergistically with the synthetic base to provide further corrosion protection. Seal Compatibility: The NEO synthetic base stock increases seal life. It will not cause excessive seal swelling, nor will it cause seals to shrink or harden.

The R380 is a suburb transmission and should have no problems with power outputs well above 300bhp, and, as you can see, in terms of fitment is the same as the LT77 , making the conversion very simple, and the ideal choice for your Rover V8 application, with the additional advantage of the short Remote or std. remote fitment.

The Illawarra                   Gas turbine                 ROVER SD1           SS ORONTES                                F100                       MONARO GTS 350       

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