When I installed my lift pump in my 07KJCRD, I used about .7 of a litre less per 100km city driving (measured by actual fuel kilometres not by computer), and the smoothness and driveability issues I had were mostly cured apart from the TC which ill sort as well.
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KJ CRD 2.8L AUTO 2007
BP ULTIMATE
Extra Transmission cooler
2.5 inch full flow muffler.
Fuel Heater Disconnected.
In tank lift pump

Provent

Boost, EGT and Trans temp.
Engine Bay Vents soon.
Transgo Valve body (no resistor)

Hemi TC P04736587AC replaced (original TC P04736582AD in '07 KJ CRD) - Nice -:)

If im not here Im there....