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Hey guys i'm hoping someone can give me some insight. I have an 07 crew max 4x4 1st and rev were slipping badly had the dash lights lit up like a Christmas tree. I started with a trans fluid change and had the valve body rebuilt by IPT had trans ecu reflashed with updated program. Transmission was still slipping. So I installed a low mileage used unit and had the fluid level adjusted by the dealer. Now when I drive it it is sluggish from a stop and is not down shifting into 1st gear manually or automatically. The trans is taking off in 2nd gear. It did throw the codes 2714 and 756 for solenoid d and b. I took it back to the dealer had them double check the programming and everything is good. Now I'm stumped as to what needs done. Any help would be great
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