Trans trouble
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Trans trouble
My 4r70w is having some issues. It drives/shifts fine in reverse, 1st and 2nd but wont shift passed 2nd gear. Doesn't even act like it tries. No CEL. I dropped the pan yesterday and there wasn't any metal chunks or any other debris in the pan and only the normal fuzzies on the magnet and there wasnt even an abundant amount on the magnet. This is a junkyard trans that was put in before I purchased the truck (2001 F150 supercrew 2wd). I've ohm'd the shift solenoids and they seem to be within spec (below 30 ohms) so i want to rule them out, but still thinking of replacing all 3 solenoids just to be safe. Also, the filter just fell out with the pan so I'm assuming that might be part of the problem. My next thing to check is the 2-3 accumulator and spring to see if its stuck or broken. Any help would be appreciated.
thanks!
Preston
thanks!
Preston
Lead Driver
Joined: Sep 2006
Posts: 7,907
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There will be no CEL for transmission electrical issues.
Only the shifter lamp.
Check for trans codes with a Scanner first to see if the issue is electrical.
If none then it's mechanical.
Again the CEL does not light for trans electrical issues.
Good luck.
Only the shifter lamp.
Check for trans codes with a Scanner first to see if the issue is electrical.
If none then it's mechanical.
Again the CEL does not light for trans electrical issues.
Good luck.
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Well, i pulled the valve body and checked the 2-3 accumulator spring and it's not broken. My next step is to replace the valve body gaskets, filter and pan gasket and check the shift solenoids to make sure they work when voltage is applied. I'm hoping that it's a sticking/stuck solenoid or maybe something to do with a loose filter because when i dropped the pan, the filter had fallen out and was laying in the pan
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