Trans Shutter / ford trans service ????

[corvetteguy]

My 97 150 4.6 has a bit of the trans shutter when it is upshifting. I was told the ford trans service might help by using ATF with friction additives. I thought they would use Mercon V, and include a full flush. My bill says 6 ATF Valvoline Maxlife 1 F6AZ*7A098*A Screen ASY What kind of service was done??????

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[Mark Kovalsky]

They dropped the pan and replaced the fluid in the pan. That changes about half of the fluid in the trans. It was a waste of money in my opinion.

Now you should take it somewhere that can do a fluid exchange, also called a flush. That will change all of the fluid, which is what is needed to fix a shudder problem.