I've got a problem with my MF5 gearbox (5 speed NA box). Since i've put it in, (did an auto - manual conversion) after driving for while, the trans tunnel gets really freaking hot. I've never heard of a manual box over heating before. Yes it does have plenty of oil, and the right grade. I've also put some Nulon gear treatment in it too. Any reasons why?

Did you remove any insulation from the floor? The boxes do get hot, my transmisson tunnel gets hot too, its a factory manual..

Your gear box will get hot under the right conditions, which i wont mention here! I have living melted truth right here! lol!

So its normal? No i havn't removed any insulation, but the car was an auto, so maybe theres more insulation on manuals? and JET-6, not sure what your trying to get at there...but it gets hot just taking it easy, no trashing.

my gearbox heats up real bad too, ive also checked the oil, and i found out a month ago that my car came with an auto and i got a manual :S

Got the right spigot bush for the manual?

no idea rb30.. would this cause the prob u think?

mine heats up heaps as well...converted 5spd...last night i was talking to a mate who knows ****loads about these cars (he's blown 6 vl gearboxes in his time lol) and he says the heat is no problem at all, he's melted his phone more than once resting it on the console apparently!

but there must be a way to fix this, cos its so ****ing annoyin.. specially in summer

mine has the same problem Some original photos have not been recovered yet.

Mine does the same thing! I was worried about it for a while but it doesnt seem to be doing any harm. Its a bitch in heat though, ill agree!

by factory turbo manual also heats up too.. more so on a very hot day