The Triumph Dolomite Club - Discussion Forum

Hello there,

I have just taken the overdrive off my old knackered (1500) gearbox and intend to put it on a new one. As it was the first time I have attempted such a swap I ended up taking it off it 2 bits... the main bulk of it came off first and the adapter bit came of afterwards (i am fairly sure I didn't need to do it like this now) thus exposing all the cogs and internals.

I now wish to make this one unit again, is there any specific sealant that I should use, I have a copper based mastic one which is said to have "very good oil resistance". Will that do? Is there now a specific gasket or is it just bonded together?

Thanks for your time.

There are gaskets between the adapter and gearbox and overdrive to adapter. I use a thin smear of sealant too, what you have sounds ok. heres a link to some gaskets, but as Im not sure which o/d you have go through and see what suits your type.
http://www.ebay.co.uk/itm/Triumph-Dolom ... 1ace6XCVvA

Tony

Hi Tony,

Thanks very much for your help, that's great.

The overdrive unit comes away from the gearbox on the ring of studs. If you have separated the front and rear bits exposing cogs be very careful the roller clutch hasnt come apart.

As for gaskets just use new ones. I tend to use blue hylomar on one side and a thin smear of grease on the other. The gaskets then usually get a second or third life if they need to come apart again.

Jonners