Changing Gearbox Oil - To Flush Or Not?

[karma_syke]

Changing my gearbox oil to redline mt90 was wondering if its worth flushing the old oil out with some kind of solvent? And if so what to use.

Opinions?

[FJ1600]

No just let it all drain and fill it up.

[karma_syke]

yeah fair enough, lots of trouble anyway.

[SargeRX8]

It doesn't call drain, but I prefer oil in my gearbox rather than some solvent.

[StevenCJR31]

Certain solvents CAN f@@k any rubber seals and cause leaks . . i know cos ive done this

[Moodles2]

I've been told shifting through gear with the gearbox oil dumped helps get off what remaining fluid is still on the synchros

[SargeRX8]

I've been told shifting through gear with the gearbox oil dumped helps get off what remaining fluid is still on the synchros

I believe this would be true. I did it and when I did I saw some more oil come out(not much) but when looking through the top where the shifter sits, I could still see the remains of dead smurfs.