what the #$%^& controls shifting 4r70w?

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Old Jan 13, 2011 | 07:12 PM
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what the #$%^& controls shifting 4r70w?

I am so burnt out on trans issues with this truck! second owner of 5 years and went the cheap route twice installing a used tranny.... Decided to have rebuilt after tc issues then shift solenoid b failure. after rebuild and new tc was good for 3 months then solenoid b failure again. replaced under warranty, good for 3 months then solenoid b failure again.... replaced under warranty.... i just drive it nothing rough but since last solenoid replacement it seems to be confused at times as to which gear it should be in. from a stop if you and go like hell it shifts through all gears perfectly but under normal take off or in town driving it seems to shift too early between second and third and will not downshift under a low strain like climbing a hill or after a turn(25-35 mph) unless you hammer it and when it does down shift it shifts hard. no codes, nothing flashing.... she runs great if you treat her like a dog!
 
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Old Jan 13, 2011 | 10:21 PM
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You might want to go back to where you had it rebuilt and ask them to look at it again. If the tranny checks out then you might try cleaning the MAF. Or clean the MAF first.
 
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Old Jan 14, 2011 | 01:55 AM
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Yea, that's what I was thinking, - clean the MAF. I'd pull it out completely to inspect. The way it's shifting, you may have hairy moth or june-bug cooked on the wires. - Depending on the filter your running of course.
 
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Old Jan 30, 2011 | 04:46 PM
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MAF CLEANING DIDNT WORK, NO BUGS DETECTED I DUNNO WUT TO TRY NEXT. I DID HAVE THE TRANS SHOP CHECK IT OUT LAST TIME, THEY SAID IT WAS SOMETHING TO DO WITH TRUCK. ANY OTHER IDEAS? ALSO IT HAS K&N COLD AIR/FILTER WHICH IS ALWAYS CLEAN AND CHARGED... THE TRUCK ALSO SEEMS TO STALL OUT WHEN THIS HAPPENS
 

Last edited by jcjason; Jan 30, 2011 at 04:49 PM.
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Old Jan 30, 2011 | 08:22 PM
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If you keep getting a solenoid B error and new solenoids don't fix it, it could be the wiring from the PCM to solenoid B.
 
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Old Jan 30, 2011 | 08:37 PM
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Originally Posted by jcjason
MAF CLEANING DIDNT WORK, NO BUGS DETECTED I DUNNO WUT TO TRY NEXT. I DID HAVE THE TRANS SHOP CHECK IT OUT LAST TIME, THEY SAID IT WAS SOMETHING TO DO WITH TRUCK. ANY OTHER IDEAS? ALSO IT HAS K&N COLD AIR/FILTER WHICH IS ALWAYS CLEAN AND CHARGED... THE TRUCK ALSO SEEMS TO STALL OUT WHEN THIS HAPPENS
Have it checked at a different shop.
 
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