Fluid Type in 4R70W
Does anybody know where I can find some irrefutable documentation that specifies the fluid type [U]required[U] for a 4R70W trans? Here's my dilemma;
'97 F150, 4.2L, 4R70W trans:
Tranny was rebuilt late Dec. '05; at this time it has less than 1000 miles on the rebuild; began to experience erratic shifting, sluggish starting from standing stop; seems to need to rev up to catch hold then it jumps a few times before beginning to go. I have taken it back to the trans shop 3 times but get no resolution... always saying it's an engine problem. Had engine analysis done twice & cat converters tested & all found to be without any problems. I asked the trans shop what kind of fluid they used after the repair. They said Dexron II. When I mentioned Mercon V being required he told me I was mistaken; they always use a "universal" fluid with never a problem.
I am about to flush the Dexron II & replace it with Mercon V. Before I do that I want to find the definitive answer to what is the correct fluid. I have seen countless opinions in these threads & other similar sites that flat out say it's Mercon V. Jerry Wroblewski, the Ford trans engineer, said Mercon V in his article "Ford Overdrive Transmissions 101", but it was directed to Thunderbirds & Cougars, not F150's. Jerry's article was done in '98 or '99. But I find a TSB 01-15-7, "Fluid Application Charts" dated 8/6/01 that clearly shows the required fluid for a 1997 F150 with 4R70W trans to be Mercon, part no. XT-2-QM. The TSB seems to contradict Jerry Wroblewski & popular opinion. Before I replace the Dexron II thats in the trans now with Mercon V I want to have some documentation to show the tranny shop if the Mercon V solves the start/shift problems. Any & all help will be greatly appreciated.
Thanks Ladies & Gents...