richard5933

Trying to get our 1974 GMC Coach up and running. Got the LP system tested for leaks and safety issues, then tried to fire up our Suburban furnace. Things overall went okay, but it seems like the motor/blower is in need of help. The blower starts really slow, squeaks a bit, then eventually starts to blow air. On 120v it's okay once it gets going, but on 12v has trouble getting up to speed. Anyone have experience either rehabbing the motor or replacing them? I assume that I'll have to pull the furnace to get to the blower & motor, but first I want to know if it's worth trying. Thanks.

There's a Motor Home Hall of Fame? Is that the same as the museum in Elkhart of something else?

This is actually our second coach. We had a 1964 GM 4106 until recently. It was converted in 1990 (we think) by Custom Coach. This new coach is a 1974 GM 4108a, and it was converted in 1974 by Custom Coach. With only 40k miles, the whole thing is like a time capsule. Condition is great, but since the conversion was done 43 years ago we'll end up replacing most of the electric/electronic components to bring it up to modern standards. I'll post a few interior photos soon.

Our previous coach, a GM 4106 averaged about 7 mpg. Mostly kept to 62 mph. That coach had Detroit Diesel 8V71 with Allison 730 automatic. Our current coach, a 1974 GMC 4108a averages about 8.5. Same speed, but the 8V71 on this one is mated to a 4-speed manual transmission.

He she is! Drove it home to Wisconsin from NJ this past week. Only 40K original miles. Interior is like 1974 all over.

Long time reader - first time posting... We just brought home our 'new' 1974 GMC 4108a conversion, and when going through the drawers we found something interesting enough that I thought it worth posting here. A little piece of FMCA history. Hope it brings back good memories. Richard