Recently my transmission began making a grinding or vibration noise when the automatic transmission is changing from one gear to the next (around 45-50mph). What could this be? Has anyone experienced this problem?

97 F-150 4.6L

 

I have a vibration around the same speds but I also have troubles finding some to fix it. I talked to Chevy dealer who works on alot of fords, he seems to think my torque converter fluid needs changed. I will have this done Wednesday. E-mail me and I will let you know if it works. CHMGLAD@aol.com

 

The vibration is caused by worn out transmission fluid. Get all of it changed. A good way to change all of it is with one of the machines that taps into a cooler line. Many quick lube places and even Ford dealers have them. They are effective at changing the fluid, and that usually fixes this problem.

Mark

 

Mark[/B][/QUOTE]

Mark Kovalsky, you were right! I changed my fluid and filter prior to getting your response, and the vibration seemed to go away. I noticed that you said change "all" of the oil. I did it the old fashioned way by removing the oil pan at the bottom of the transmission. Did this not remove all of the oil? Do you think that I should have let someone else do it with the special tools that you mentioned? Thanks for the input.