Thread: defender gearbox

its been done by a few members, if my speed gives up thats what i will be doing........not sure that it would be a cheap fix

It can be done. The cost is in all the extras. You need the selector and so on to do it. Rear drive shaft might need to be changed also.

I`ll bet you were still using the ATF L/R specify??
ANY,ANY manual rover box----use a 75w-80 gbox oil
Penrite comes to mind

is this a selector issue?

Originally Posted by INDABA

I`ll bet you were still using the ATF L/R specify??
ANY,ANY manual rover box----use a 75w-80 gbox oil
Penrite comes to mind

I don't have a landrover gearbox, but there are posts here relating thicker oil leading to gearbox failure. Unlike many gearboxes, the LT77's and R380's have internal oil pumps.

Someone else can confirm or deny.

Originally Posted by Dougal

I don't have a landrover gearbox, but there are posts here relating thicker oil leading to gearbox failure. Unlike many gearboxes, the LT77's and R380's have internal oil pumps.

Someone else can confirm or deny.

Deny.

The internal pump uses steel gears, unlike the earlier boxes, and Land Rovers specification has been a 75W-80 GL4 since '97 or so, and is the sole factory recommendation for all R380's these days.
Apparently no gearbox reconditioner in Australia will warrant a re-build unless a 75w-80 at least is used. ie, no ATF's.

Now, as to which brew is preferred........it seems that they are pretty idiosyncratic and some prefer one brand over another, but most people settle on Castrol Syntrans, which is a 75w-85 pao/ester synthetic (around 11.9cSt@100*C) but a lot of workshops use Valvoline Duragear 75W-85 with success too, Redline MTL and brews of MTL/MT90, Castrol VMX-80 and VMX-85, etc, etc.
FWIW I've been trialling/using a 14.5 cSt oil for the last twelve months and there's been less 'whiskers' on the drain magnet than when using Syntrans or MTL, but it also has a much, much more robust additive package while still meeting an SAE/API 1b copper corrosion test.

http://members.shaw.ca/jbarge/MTF.htm

Originally Posted by rick130

Deny.

Fine, be like that.

Originally Posted by rick130

<snip>
FWIW I've been trialling/using a 14.5 cSt oil for the last twelve months and there's been less 'whiskers' on the drain magnet than when using Syntrans or MTL, but it also has a much, much more robust additive package while still meeting an SAE/API 1b copper corrosion test.

Low Viscosity Manual Transmission Lubricants

Do tell. Another chapter in Rick's oil story.

Hard keeping up with the Joneses.