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I'm the original owner of a 2003 Lexus LX470. The SUV was perfect until the transmission went out at 160K miles. I had it rebuilt ($2500) and it came with 10K mile or 1 year warranty. Unfortunately I've passed my warranty (16 months) and when I accelerate it seems to slip for a few seconds. Then I back off the accelerator and it speeds up properly. P2757 code comes uo which says it's probably a "faulty line pressure solenoid valve SLU".

I've read where people have tried changing the transmission fluid and changing the SLU solenoid. I've also read that changing the SLU and TCC sensors fixed the issue. But I never could find any prices associated with these type "fixes".
Am I looking at sinking lots of money into this problem? What should I ask mechanic and lastly, should I take it back to the place that rebuilt my tranny? Thanks in advance for any advice. I can't afford a decent used car at the moment. What should I do?
 
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