Originally posted by big mike
i had a transgo kit and cooler installed last weekend, and i went with the spring that offers the firmest 1-2 shift, but i cant get the tires to bark, even with a manual shift out of first at 5k rpms. some things that i should mention about the install:
1. the TC wasnt drained of the 101k mile-old tranny fluid (fluid has never been changed before, yes i know, bad me)
2. we put in 10 quarts of new mercon v along with the old fluid in the TC (i plan to add more mercon)
if you didn't drain the old mercon III out, that could be bad for the tranny. i recently did just a filter change, and swapped over to mercon V, but i let the vb
drip forever, and pulled the plug on the converter. i would recommend draining completely and refilling with just V...and maybe some friction modifier.
2003 Ford Expedition: 5.4L, harley supercharger, 2.93 upper pulley, 4lb lower pulley, c&l plenum, jlp cai, LFP SBTB, FTSP, Magnaflow 3" catback, Eclipse AVN-5510, white face gauges, cobalt c2 boost gauge, ddm hid's, 379 rwhp, 465 rwtq sold 11/3/12
2009 Ford Flex Limited AWD