Thread: R380 5th gear rattle

While it is probably possible I think it would be very hard to do this and not get leaks. When you unbolt the extension housing it is the same bolts that go through the centre plate to the main housing.

I think that in removing the extension housing you would almost certainly disturb the sealant between the main case and the centre plate. as now they wouldn't be held together other than by the internals.

I would think that unless you knew exactly what you were doing you would end up with oil leaks.

no the trans requires removal from vehicle for a rebuild as end floats etc need to be measured etc on a bench, not possible when attached to engine.

Pete, we have done many 5th gear repairs this way, the factory sealant is quite strong, careful removal of the ext housing ensures the plate doesn't detach from the case, and after the ext case is removed i bolt the plate to the case again with a couple of dummy bolts while working on it.

no leaks yet.

jc

Got the box out yesterday and 5th gear on the layshaft looks like a bad boxer. Missing several teeth. All ready picked up a replacement box and should be back on the road this week which is good cause its my daily driver. Thanks everyone for your advice.

Good news.

Not especially relevant as you have a new 'box, but was there any other damage evident? Any play in the layshaft indicating worn bearings? Oil pump intact in the end of the extension housing?

Was the choice to go for a new box driven by the need to get it back on the road ASAP?

Cheers!