2004 Cummings code p1222 and p0868 trans just rebuilt and back to dealer 5 times next time attorney. help old man

$1500-2500. Examine this resource:

http://www.transmissionrepaircostguide.com/
.

Chec fluid level and condition. Old fluid becomes thic n slow. Make sure trans.cooling lines are not cloggd...heat kills an automatic. Car may just need seals rebuilt .....junkyard or jaspar if replacin

Return to dealer and insist they stand behind their work. Last resort, have attorney call dealer.

Here's a link to your code. P0868 Nissan Secondary Pressure Down

Read codes or have them read.

sometimes one problem will set off another,so your cataline converter could be cloged or tailpipe witch will make you lose power and may set off other sensors.just a thought. rodger...

Steve, go to buickforums.com. They have a roadmaster section with a lot of dedicated roadies, some are fanatics in their loyalty to those Buicks. I believe there are a good amount of sharp people on everything Roadmaster. They should know all the ins and outs of that code 84 and what to do about it. Joining is free to register.

Now personally, I don't think a reflash can be done on a '94 model, that is still OBD-1, but I cannot speak with certainty.

sounds like you have a worn syncronizer. unless it gets really bad, you can keep driving like that, be gentle with those shifts and you shouldnt have any problems. changing the fluid may help prolong the life. if it gets bad, the transmission will have to be rebuilt.

Could be low on compression, or torque converter may be slipping

these do suffer from blocked EGR valves you need to remove it and take the solenoid off clean out all the soot.