Hello, I have an 88 325i auto with the 4hp22 and it’s been having an issue where it has to warm up in order to shift properly, otherwise it will stay in 1st or 2nd. After shifting to 3rd it shifts perfectly fine for the rest of the drive, but now that it’s warm it refuses to go into reverse. Reverse works fine when cold. I did a fluid and filter change but I’ve had the same results. I’ve heard of a sticky governor valve, but wanted other answers before dropping the valve body.