Allison Tran
I have erratic shifting with my 8.1 Allison 1000 tran. 50mph and above my tack shows 2200 to 2500 up and down from my tran shifting. Any one else every had this problem with this Allison 1000 tran.
Forum Discussion
Also it is a good idea to confirm that the fluid level is correct. Just because it was serviced does not mean that the mechanic filled the transmission properly. Most mechanics "guess" at what the level should be and do not actually go out and drive the coach long enough to get the transmission fluid hot enough to properly check the fluid level. Fluid must be checked with the engine running in PARK, after the transmission has reached normal operating temperature.
