4R70W, 94 F150 Shutter

kbisswanger · #1 05-10-2005, 02:53 PM

Hello all. Before the question I just wanted to say that this has been a very informative site. Keep up the good work.

I have a 94 F-150 that has had a shutter for nearly 125,000 miles. The truck now has 175K on it. I bought the truck new and the shutter began around 38K. The transmiss has never been changed and the door jamb says it has a "U" type transmission; which I understand to be a 4R70W. I have read several of the posts on shutter and decided to replace the fluid with Mercon V. I did this last night. I dropped the pan, drained the torque converter, and replaced the filter. It seemed to correct the shutter in the lower gears but still has the shutter between 3-4. It doesn't seem as bad as it was but it is still there. I was wondering if it will take time for the shutter to go away completely. I did not add any type of additive after the fluid change. Are there any recommendations as to what additive (if any) I should use?

Thanks,
Keith

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casey_1 · #2 05-10-2005, 04:37 PM

When they shudder for that many miles the torque converter clutch is damaged. New fluid won't fix it anymore, you need a new torque converter.

If the fluid is changed when the shudder begins it will usually avoid the clutch damage.

dirtyd0g · #3 05-10-2005, 06:16 PM

IMO all pre 95(and some 95's) torque converters are built damaged. They just weren't any good.
Alan

kbisswanger · #4 05-10-2005, 10:25 PM

Thanks for the reply. That's not the only thing worn out on the truck! I have to say it did help the shifting dramatically, but not completely. I think i will probably fix it this summer by purchasing a NEW Ford F-150. I hope I can get as many miles out of the next one!

Thanks guys,

Keith