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There was a few changes made. one is the addition of a pair of plastic caps over the electronic shift valves. Very inexpensive parts. I don't have the trans number breakdown of when they began installing them at the factory. If you have a 98, especially an early version built in 97, chances are it needs them. The valve body needs to come down to see if it has them or not and to install them if neccesary.
There is another addition, a magnetic pad about 1/2 the size of a playing card, just drops into the pan. Another cheap part, should be "0" extra time for this.
For the caps i could see an extra 1/2 hour to 1 hour labor to check and install these if neccesary.
The magnetic pad I believe went into production roughly beginning of CY 2001.
Yes, there is a trans filter, again not a very expensive part. The fluid is pretty expensive though.
It is not sucked out, the pan is drained and removed in the regular way. An earlier version will have a torque converter drain plug as well, the engine is rotated via the front of the crankshaft until the torque converter drain is visible through the access hole in the bellhousing. I believe the drain hole on the torque converter was eliminated beginning with the 2000 models.
I fully believe you would be responsible to pay for these changes.
I would say only if you really plan on keeping the truck many more years that you would consider doing this service, and even then I'd wait to closer to 100,000 miles.
I don't know how to respond to who you should have do the work, whoever you want I guess is as good an answer as any.
Or if you find that one of the techs has been through the 722.6 class lately, he may be the guy to ask for.
Gilly
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