R380 5th gear rattle

Quote:

---

Originally Posted by justinc

Yes you can take box out as a unit, although you can rebuild 5th gear and all rear bearings, replace oil pump etc with the trans in the vehicle. Remove transfer case off the rear of transmission, then extension housing and 5th gear and associated bearings etc etc are all revealed

JC

---

Never thought of that... I suppose you could do most of the gearbox that way...

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:o:D.

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!

We didn't really check to much but the gear that is on the main shaft was a bit marked up.
The new box was to try to get me back on the road asap. If I wasn't so busy with work I may have got it rebuilt. The guys at modern motors at dungog helped me out by coming in on saturday so I could do the exchange.