Original Customer Complaint:
intermedant no reverse shift inhibit light on when no reverse is present
Current Customer Complaint:
intermedant no reverse with shift inhibit light on
Work Completed This Visit:
replaced mlps sensor
Summary:
none
Update
Finally had time to check out this Allison some more. Thanks to everyone who responded. It is 2-wheel drive. I just did a road test and the problem is getting worse. Now it will start slipping on the 3rd to 4th shift. It has a flair at light throttle, but will spin up if you crowd the throttle. It goes into fail-safe and sets code P1721. My ATSG book definition says "Trim solenoid "B" controlled clutch not engaged" Is this a performance code or a hard code? I have a code po 473 when it sets this code and you stop it will not have reverse can let the truck set for about 10 mins reverse comes back to it ,thanks