>. I have been informed by JM and trans builders, the 4L80E pump face must be machined flat/parallel, for effective mounting/sealing. I'm prepared to do this. For better up-shifts, I like the design that "releases" frictionals, rater than applying. Some say this is an advantage of the TH400 and 4L80E. Cheers, flyingwedge. :coffee2:
