So today's MORG was eventful.
All good pretty much the entire day. Not even a random suspension fault. Then as we were leaving I decided to take a stab at a muddy/rutted hill climb. Litterally about 1/4 mile from pavement. I got maybe 50' up the hill and BANG followed by loss of drive and the engine reving high.
What the hell was that??? My first thought was I had killed my aftermarket rear driveshaft.
I rolled back down and put the truck in park to have a look under and noticed it kept rolling even in park. Hmmmm....
OK, if it's rolling in park that sounds like the parking pawl in the trans broke. In the old days it wasn't uncommon to hear about people jamming a transmission into park before coming to a complete stop and doing that. But you wouldn't break something like that doing a hill climb.
Well, maybe if the driveshaft was broken and decoupled from the rear and the transfer case clutch was open? But no, don't think so.
I found I could still drive on level ground forward and back, without any scary noises. So we dove the short distance to the pavement and aired up. I was hoping I could limp it on home, but heading toward hiway 50 on the 2-lane it started slipping in gear - the engine would rev but no propulsion. Eventually I lost all drive. Switched to low range and was able to move again but still with slip. Not far later that stopped working as well.
So Nick towed me the rest of the way to Pollock Pines. While he was towing us we started getting some nasty noises and vibrations.
Then it was flatbed to home, where I've just unloaded her. At this point I'm almost certain it's the trans or transfer case, and my money is on the transmission. I haven't actually crawled under it at all to look other than to see that the rear U-joint is still intact, so there's diag work to do but you know it will be the trans - it's the most expensive part!
Actually, I'm not exactly sure how I'm going to verify transmission vs transfer case. It's not like I can verify output of the transmission separately from the T-case.
This is a new one for me - I can't think of anybody breaking either a trans or TC on an LR3. I'm sure somebody's done it, but not that I'm aware of.