Hey y'all,

I just finished my first tank of fuel since my 2.47 differential swap and I got 29.42 mpg in a 30% highway and 70% city mix of driving. I used a GPS unit to calculate miles driven and the fill-ups had visible fuel right up to the filler opening both when I initially filled up and when I filled up today. The best I did before the diff swap was 27.2 mpg and that was with a little more highway driving as a percentage. Generally, my car gets 26 on every tank no matter what I do and I'm excited that the diff swap is looking like it will have efficiency advantages as well as noise benefits. I will report my next tank's mpg when the next 500 miles goes by. It is possible that this tank was a fluke so more testing is needed.

In further attempts at noise reduction, I put glycerin on my door seals today to try to get rid of the creaky sound they make and it made a big difference. We'll see if it lasts. I read about using glycerin on door seals in some owners manual but I can't remember where. So far, it seems to work and the car is quiter still.

Jim
1982 300SD Midnight Blue 312K