About Van Expertise I have been maintaining a fleet of approximately 55 light, medium and heavy vehicles for over 20 years. Most are 4X4 pickups and off road fire fighting trucks. Some medium duty trucks. Some military light trucks.
I can answer most questions concerning 4X4 engine, drive line, suspension, electrical, and fuel, both diesel and gasoline. Ford, GM, and Dodge, old and new, but prefferably not newer than 99.
Question I have a 90 Chev 3500 with a 6.2 and 4l80e trans. Just rebuilt the engine, bought the truck in non running condition, but trans was supposedly recently rebuilt. The service engine light is on. Took it for a test drive, the speedo doesn't work, and it doesn't want to shift out of 1st. If I let off the accelorator it seems to shift into neutral, I say this becasue if press on the pedal again it will rev almost freely, and if I pull the lever into 1, it will downshift. Any idea what the problem might be?
What should the timing on the 6.2 be set at, and how do i check it, I know how to check on a gas(timing light), but not on a diesel.
Thank you
Answer Hi Jimmy,
The timing is set by loosening and rotating the injector pump to lign up the tiny little mark on the top sloted mounting hole, with the mark on the timing gear cover right beside it.
The other problem may be associated with the vehicle speed sensor on the tranny. Looks kinda like a speedometer gear, but with wires in stead of a cable.
