This is for you Sir Phil,
Car: 4.6is, 02, 129K, DINAN II trans software
Symtoms:
1. Harsh thump from 2-1
2. REVS seem to be high but the beast does not seem to be moving like it used to. It does get going after 40+ from start, but taking off very slow..dragging.
3. Service Engine light comes ON & OFF. no particular interval with no warnings, it has never experienced Trans fail code yet.. (TW)
4. It does seem like the tranny is slipping 4-5 gear.
Thanks for all your help mate!