Could changing trans fluid in my 2002 F150 at 80,000 miles cause torque converter shudder...

Asked by Sep 19, 2012 at 02:44 PM about the 2002 Ford F-150 XLT Crew Cab 4WD SB

Question type: Maintenance & Repair

I had my trans fluid purged at 80,000 miles at local garage..The receipt says they added 17.70 quarts of Mercon 5..Now I can't drive vehicle over 50 without trans shifting in and out of lockup...What needs to done to fix this.???

3 Answers

232,605

They might not have added that much to the transmission, but used that much to flush it. Check the fluid level first to see if that is what is causing the issue. Past that, take it back to the garage and have them diagnose what is the issue, or a local reputable transmission shop.

17,930

Check the level of the fluid when hot. If the system is overfilled it will cause the fluid to airate (make bubbles) in the system. The shifting problem you describe can be caused by an over filled system.

56,745

Make sure they really used Mercon 5 as most shops like to use a generic fluid rather than the real (and expensive) correct fluid. Make sure the fluid is at the correct level as low fluid level will kill your transmission fast. There are two transmission filters, one for 2wd and one for 4wd. Make sure they used the right one.

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