Question about Cars & Trucks
Will not shift gears till you reach a certain speed so if your driving in town at slow speed it stays in 1st or 2nd. It does change from 1st to 2nd at 35 mph and form 2nd to 3rd at 42. Works fine if you take off and keep going. It's just when you are driving slow it doesn't change gears till you reach that speed. Any suggestions?
Run fault codes and check for TCM operation. Change the oil and clean the filter. Have the bands and clutch packs adjustment checked while the pan is off.
Posted on Feb 09, 2014
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Posted on Jan 02, 2017
Ratio codes generally indicate a pressure loss & slipping which the computer reads as a gear ratio problem. Likely you need a rebuild.
Posted on Mar 16, 2009
The EMC detected and problem so it's in limp mode, As long as it's in limp mode the 4th and OD will not activate. Take care not to burn up the transmission by running it hard while your in the limp mode.
Your going to have to get the truck scanned to clear any codes and why there are DTC codes. Auto Zone scan for free and most auto shops charge $10.00 to $20.00 to scan sine they want the business.
If you want to clear the codes your self you can put the ignition to the run position and pull the ECM (Batt) fuse out for 20 sec and place it back in then start the truck. It may stall but let it, just start it again and this would have cleared all the DTC code history.
The transmission should be running fine unless there is a problem and the service engine light will be on again and you'll be in limp mode still with an updated DTC in the ECM.
Good luck and hope this helps.
Posted on May 26, 2009
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