E40D help please!!!
I purchased a 93 F150 4.9 auto for a weekend use truck knowing that it had some trans issues. (O/d light won't turn off and no 2-3 upshift once warmed up.) I figured I'd take it to a trans shop, fix it and move on. Not so easy. 1st trans shop says they think it might need a new trans and when I came to pick it up the employees were all offering to purchase the truck. Seemed sketchy so I went to another shop. 2nd shop says solenoid pack shorted out. No problem... change it. Still the same. They found that the pcm wasn't communicating any live data with their scan tool and suggested I replace it. Replaced. Now the o/d light turns on and off. But still no 3rd or 4th gear once warmed up. I did notice that when I do have 3rd/4th it will only go into them at low rpm. Any small increase in RPM causes immediate down shift. This made me feel like it could be a tps issue. Changed that (properly clocked) no change. Im at a loss. If anyone has a suggestion I'd certainly appreciate it. Im ready to put a bullet in this truck!
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See if you can have the vehicle checked for any trans codes. That should help provide some direction.
There could be a problem with the overdrive system. Depending on what code(s) obtained , you might need to drop the pan and look for possible broken overdrive servo parts. Possible problem with trans control module. |
You likely have a stored code. Staying in second gear is being in a "limp mode" indicating an issue and a code being set.
Don't overlook a wiring issue between the tranny and PCM. |
I appreciate the feedback guys. I found 2 stored codes. 334 which I believe is egr related???? And 628 which I know is a converter slippage code.
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From my recollection , those EGR sensors were problematic. Just get a new one from FORD and replace it.
You might want to soak with PB Blaster , the three little screws that hold the sensor on to the valve assy. They were easy to wring off if not careful. If you notice it starts to feel funny while trying to remove the sensor screws , get another valve assy. before you windup with no sensor mounting. |
Originally Posted by hanky
(Post 123544)
From my recollection , those EGR sensors were problematic. Just get a new one from FORD and replace it.
You might want to soak with PB Blaster , the three little screws that hold the sensor on to the valve assy. They were easy to wring off if not careful. If you notice it starts to feel funny while trying to remove the sensor screws , get another valve assy. before you windup with no sensor mounting. |
Originally Posted by raski
(Post 123487)
You likely have a stored code. Staying in second gear is being in a "limp mode" indicating an issue and a code being set.
Don't overlook a wiring issue between the tranny and PCM. |
Bump
Any body have any thoughts on this?
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