My Buddys son was having trouble with his gasser EL60E and it turned out to be his throttle position sensors.
Shifting issues were his problem,but i can not tell you what exactly they were.He was looking for a replacement tranny and had his truck parked.Then he found out about the throttle position sensor issue.And the rest is history.
90 Chev 3500 c/c 4x4,6.2na,400 auto,4:10 gears.DSG Timing gears,main girdle, isspro tach, pyro,boost,oil and trany temp.Dual Tstats, High volume peninsular pump,on shelf, Custom turbo and intercooler 85%complete. Change of plans for the dually, it's going to get a Cummins. Both trucks are Blue 90 4x4 crews