Drive Line work in KY advise please

[skhagen]

I am in need of trans fluid pressure adjustment or evaluation Tranny, shifts well but gets slugish after excessive stop and go driving. I also need some real diagnostics of the fuel system performance. Local dealer is exspensive and not really intereted in 12 year old cars.

I recently tuned the car and saw a +150RPM change at the tack, weird, just from spark plugs. I saw a loss in mileage 3 mpg and slight miss when warm in park. non when in gear. Im running mobil one in Trans installed 15 K miles ago with filter no issues at that time.

Anyone familiar with the indi shop in winchester KY BMW Benz only shop. I hear alot but when hes the only inie around??

1996 e320 158K miles w210 Id love to keep this dcar on the road since it really runs good.
bosch f8dc4 plugs new
mobil 15w50 oil and new was5w40 castrol could the mobil be to heavy?
mobil syn trans fluid 15k ago
brembo slotted rotors and EBC red pads 15 K ago; not impressed to noisy
water pump is new 20 K ago belt
wheel bearings and lwr ball joints with all suspen busings 20 K ago
AC system 50k ago

next was to be cv axles and drive line