wallynm wrote:
What does the tac say? Any drop in RPMs?
berfle wrote:
I have a 2010 Bounder 33u on a Workhorse Chas is with Vortec 8.1 and Allison 5-speed (approx 26,000 miles). I've read that the 5-speed can be changed to a 6-speed but this is pretty strange. We've been on the road for several days and 2 days ago I noticed that the dash display is now showing 6 speeds. Also maybe my imagination but when it goes into the 6th speed, it's smoother and quieter (as if it's shifting into OD).
Yes the tach does drop a few 100 rpm' when going to 6th
