On my 91 there is a tiny electric motor next to the odometer. My trip meter died in 1995 just before the 100,000 mile roll over. I took the cluster out & apart to see whats what.
Couldn't figure out how the trip operated. I saw the electric motor next to the odometer . After looking and studying it I decided the trip meter wasn't that important any more.
Never did fix it. Main reason was I didn't want to mess up the operation of the odometer.
I took one apart at the junk yard once. I removed the odometer / trip meter wheels, but could not get the wheels to free wheel on the odometer so I could not set it to my mileage , I couldn't even get the numbers to roll backwards. Nor could I get the wheels apart as individual pieces. Damn tamper proof parts !!!!
So I figured the hell with. When I checked at the dealer about replacing the trip meter in 1995, the only part that was replaceable throught GM was a drive gear on the odometer side that I didn't need. Nothing for the trip meter was available.
Now the cluster could be sent out for repair, but I geuss GM don't wat anyone doing their own repairs, figuring a guy would roll the mileage back. If anything, I'd set it higher.....lol.
Perhaps you can try getting another motor at the junkyard. 92 is a different cluster than 91, but probably the internal components may be the same.
Worth a try.
good luck.
========= Harryface =========
1991 Pontiac Bonneville LE ~_~_~270,000 miles_~_~_