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4T65E Harsh Shift (assuming shift pressure is too high)
that gives me a little more to go on. it does have 3.73 gears and P265/70-17 tires although it was doing this with the factory wheels and factory tire sizes also. Not sure on the temps as it has no trans temp gauge and it didn't show that option on my code reader. I'm seriously thinking of...- Hunt4Gold
- Post #9
- Forum: Other Vehicles
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4T65E Harsh Shift (assuming shift pressure is too high)
Any luck? I have a 1999 Tahoe 4x4 with 114,000 original miles and had the P1870 code pop up. Checked the trans fluid, clean and red, no burnt smell. Went ahead and drained it, replaced the TCC solenoid, the two upshift and one down shift solenoids, installed the Sonnax pinless accumulator...- Hunt4Gold
- Post #7
- Forum: Other Vehicles
