This is wot done it. Image A stone, collected on Friday while crossing a ridge of gravel made by a road grader on a narrow dirt road. I had to cross over the ridge to get to the side of the road that was wide enough to travel along.
Mechanic said that in effect I had a stone engine mount when reverse was selected & the engine torque in reverse jammed it in tight, negating the effect of the rubber mounts.

Mechanic just called. Asked if I was sitting down and ready for a price. I said I was. It’s around $850 LESS than I had been led to expect. There was a stone caught up in the gear linkages somehow causing the noise in reverse & at idle. Cost of repair is $55!

I recall helping to replace the clutch in Dad's Toyota Hi-Lux pickup in the early 1980s. It wasn't overly difficult, certainly doable in the back yard. But unlike a front wheel drive car you don't have to dismantle ½ the engine to get at it cos everything's no longer all in a straight line like the old vehicles.

OneDrive app on the MacBook Air doesn't want to let me log in, so I've deleted it & its corresponding synced files in the Home folder. Instead, I have created a single site browser of OneDrive using Epichrome app. This at least gives me access to my content. No such problem with the iMac.
Opened Keychain & deleted the OneDrive Cached file therein, as recommended by MicroSloth, didn't work.

Car made horrible graunching noises when reversing but was OK going forward, apart from the clutch taking up at the bottom end of travel & having over 2 inches of free play before any action. Mechanic says it's a big job to get at the works 7 the flywheel must also come out because it has to be machined. This is needed, she said, because otherwise there's no warranty on the clutch pack.
I should have it back by Wednesday, I was lucky that someone else had a breakdown on the weekend & had to have their car fixed on the spot, rather than waiting for the mechanic's appointment tomorrow. So they cancelled the booking, leave a time-slot free for my car. Amazing because it's a holiday weekend coming up on Monday & folk like to have their vehicles serviced & ready for a trip away.

A friend who's 60-odd km away emailed me with an odd problem: the SSD from his failed 2011 MBP when installed in an external case, wouldn't mount on a 2012 Retina MBP borrowed from his son.
Yet this same drive would mount on his NAS. He wanted to get some 300 GB of stuff off it but couldn't work out how to do it. A different ext drive setup (3.5-inch in case) mounted OK.
I suggested he put the SSD back in the MBP & restart it in target disk mode, connecting the two Macs via a Thunderbolt cable.
He said he'd give it a go but wasn't prepared to buy a $60 just to do that.
I suggested he could borrow one from me, if he was prepared for a 120 km round trip as my car was out of action. He asked for my address & said he'd be there by 10 am. He was 5 minutes late, as it turned out.

I've heard back, after a few attempts the old MBP in target disk mode had mounted on the desktop of the new one & he was transferring the stuff from it.
This is just one of the reasons I insist on at 2 clones & at least one TM backup - there'll always be a copy that's only a few days old if recovery is needed.

Mechanic just phoned me. They have had a cancellation of a booking for tomorrow and can fix my car then. It might even be possible to make a start today.

Missed out on that: it’s good for three months OR 5,000 km: I’d exceeded the latter.

It’s only new to me. It’s 5.5 years old and has traveled over 140,000 km in that time. She previous owner must have been a right bastard of a driver to get it into that state.

My older sister is visiting Mum for a few days, she’s over from Western Australia, several hours flight time away.
I had planned to visit today, but the noise from the transmission as I eased the car into reverse put paid to that idea.
I hope to get it to the mechanic tomorrow, may have to leave it with them for a week due to demand.