Hi gang.
Last month I finally got around to doing some service on my 96 f150 xlt with tow package. It has 163,000 on it. As far as i know the trans had only an oil and filter done right before i got it at 152,000. It had the shutter everyone complains about and a can of conversion fluid (dexron to mercon V) seem to fix it for a month or so.
Anyway. things i did were.
1) Replaced both Accumulator valves with bonded rubber units.
2) Mild J-MOD on the valve body plate.
3) Sunnex SURE CURE kit parts in the valve body only didn't due the seals it came with.
4) Heat Buster 4 core Copper radiator.
5) Upper and lower hoses
6) power flushed the cooler with 2 cans of flush stuff and compressed air after.
7) Added drain plug
8) Added second drain plug kit and fitted a trans temp unit in the pan.
9) Royal purple MAX ATF (5 gallon pail)
I've been towing a 6300lbs trailer with it and the max temp i've seen was 160 deg!
I have no shutter anymore! I'm getting 15.6 mpg up 1.5 from before the service with just the truck full of stuff in the bed. still get around 10.5 while towing.
I'm so surprised at the trans temp but then again the big rad the motor never get hot at all. maybe to the "R" in NORMAL going up the vermont hills.
44