Thread: 110 Gearbox noise in 5th

Originally Posted by justinc

Mike, just did one, can be done in the vehicle. It is only possible with the R380, not LT77, and is quite easy actually. As Stuart says, A few bearings and possibly 5th gear if it is damaged but you MAY have caught it in time

JC

Justin am I understanding correctly.. that it's possible the R380's 5th gear bearings could be changed while the gearbox is still in the car?
And ? third gear synchro?

-Brouss

Originally Posted by Mikelsgt

And the verdit was ....

After delays for Xmas and then January holidays the beast is finally fixed!

It had stripped a number of teeth off 5th gear.

Gear and synchros replaced and seems fine.

I tow a Tvan (all up about 1200kg loaded) is advise never to tow in 5th or only if flat under no real load?

Well done... good that only 5th gear needed replacing... our R380 sheared the layshaft - thought luckily didn't destroy the oil pump at the same time.

I drive differently now - I would definitely suggest 5th gear when towing ONLY when level driving, and minimal acceleration, if any. If you have a look around at pics of the layshaft in the R380 (my rebuild thread has some, I think), you'll see how weak the layshaft is where it exits the gearbox into the extension housing, which is where both 5th and reverse gears reside.

I'm also wary of applying too much power through reverse gear as well, after a look at the gearbox design.