4L80E: Doesn't shift into overdrive...
I'm on the road on a short trip (120 miles) in the motorhome; due to traffic, I didn't put the selector into OD until about 1/3 of the way here. It usually shifts into OD at around 50-55 mph. Never did shift, stayed in 3rd.
I had the coach serviced a week ago, and it worked normally. The only messing around I did was to spray lube on the IP shaft, as it wasn't returning to idle like it should. That's normal now.
I checked the TPS, and it's secure.
Temps and performance are otherwise normal.
Any ideas?
'94 Barth 28' Breakaway M/H ("StaRV II") diesel pusher: Spartan chassis, aluminum birdcage construction. Peninsular/AMG 6.5L TD (230HP), 18:1, Phazer, non-wastgated turbo, hi-pop injectors, 4L80E (Sun Coast TC & rebuild, M-H Pan), Dana 80 (M-H Cover), Fluidampr, EGT, trans temp, boost gage. Honda EV-4010 gaso genset, furnace, roof air, stove, microwave/convection, 2-dr. 3-way reefer. KVH R5SL Satellite. Cruises 2, sleeps 4, carries 6, and parties 8 (parties 12 - tested).
Stand-ins are an '02 Cadillac Escalade AWD 6.0L and an '06 Toyota Sienna Limited.