pnichols wrote:
I wonder how steep Old Priest Grade is in CA?
We went up that once in our 3-speed column shift Dodge 3/4 ton camper van and it barely could pull it in first gear, as only 3-speed manual shift gearing results in a tall first gear - plus we had over-diameter sized tires on it which made all of it's gear ratios even taller. (We got 18 MPG out of it's 318 V8 on camping trips, however ... this was using 1972 V8 engine technology.)
I found an article on Old Priest Grade and it mentions that it is a 22 degree slope. BTW last time we were there RVs' were prohibited from using it, had to use CA120, which was full of switchbacks and very slow but beautiful.