transmission shudder

Hi - Dave here, contributing to RepairPal and providing expert advice since 2010. Your transmission needs to be serviced every 30,000 miles or so. To go that long is just basically asking for trouble. Yes, I would definitely recommend draining and filling the transmission and reevaluating. You may need to drain and fill it several times – this will get more of the fluid out. Only 3 to 4 quarts will drain at a time; there are probably 11 or 12 quarts in the transmission and torque converter at any given time. When you do multiple drain and fills, you will replenish most of the fluid. Then, drive the vehicle to see if improvements are noticed. It could be that the friction modifier's in the transmission fluid have broken down and replenishing will make it better. , it could be that the transmission itself has experienced internal issue as a result or for unrelated reasons. I need help draining and filling the fluid or doing further diagnosis I would recommend reaching out to a qualified shop near you.. https://repairpal.com/auto-repair-near-me Click the link to find some shops near you who can help out! or call us at 877-913-1554. We'll gladly find you a certified RepairPal shop in your area.