I changed the transmission fluid and the filter 300 miles ago; lately, when I start driving, the car seems to stay in first gear too long and then suddenly jump into second gear; it makes the rear wheels chirp;
it then shifts quickly from third gear to fourth gear.
I am looking at the following:
1x 616 617 Diesel Transmission Vacuum Shift Valve Dashpot Upgrade $10.85
1x Diesel Automatic Transmission Peak Performance Tuning - NEW MANUAL RELEASE
Can you help?