Copperslip on gearbox filler plug?

[jacko4]

Hi all,
I've just been doing a pre season check on our Gina, and I decided to change the gearbox oil for some 75W90 GL4/5 semi. I read that the filler plug was a swine to get out, and so it was. Two foot of mine and borrowed extensions and a 17mm hex drive and impact driver plus a half hour and a bit of heat, victory was mine.
I'm letting the oil drain overnight, but I'm wondering whether I should Copperslip the plug before I re-fit it?
Do'es anyone know if the copperslip will react with the oil or the plug and casing due to them being dissimilar metals?
Thanks in advance

[Aidan]

I copperslip them, or you can use ptfe tape
corrosion shouldn't be a problem if regularly oil changed, problem is a lot of them have been in for 20+ years

[Hacksawbob]

I think you can get new plugs too, probably Brickwerks, might be an idea if the socket has been damaged

[jacko4]

Thanks for that guys, best to ask if not sure.
All set for the season now! Top day today, smells like SUMMER at last!!

[Wolverine]

In my (and yours?) T25 the filler plug (and the drain plug) is cone-shaped,so if you twist it tight enough,it does not need a copperslip.

[CovKid]

Which reminds me Aidan, two things that amused me when we were refitting that gearbox in Manchester. I just said to Jonno "We'd better just check filler plug is loose before it goes in" - was finger loose complete with copperslip.

Then to top it all, we were about to fit a new release bearing (original rattled like a rattly thing) and blow me THAT had been changed too. Just amused both of us....

[Aidan]

filler plug was loose cos there's no oil in the box, obviously, when delivered