The levels they prescribe avoid any frothing of the lube that makes the oil escape through vent. I have never had AOC and diff vent oil when filled to fill hole overflow. I drive 85+ MPH in west Texas and on my 2010 XC60 it never had and signs of oil. The angle gears will have a little venting if fu...

The valve pictured is the max pressure relief. The other item holding pressure is the check vale integrated into fuel pump. When you hook up the fuel line to sender top you have both in the circuit. Did you remove the sender and actually see it dripping? The fuel sender assembly fixes both leak sour...

Are 1998 and 1999 TCUs the same? One runs Motronic 4.4 and a 99 runs ME7, pretty different …? No. 1999 is the CAN intro year and TCU also gets security matching starting that year. No plug n play. 97 850 LPT and 98 LPT have interchangeable TCUs but 97 HPT are M4.3 with 98 HPT becoming M4.4. I remem...

Auto Trans Cooler line IS suitable due to stiff construction. Fuel hose and other hoses at the auto stores are too soft.

There is a vent hose, around 1/2 inch diameter, that goes up and has a bend and has a round filter on end. If that has gotten a mud dawber nest, spider nest, etc. in it so that it doesn't flow freely, the vapors can't escape as fuel goes in and the vapor and fuel spit back and trigger fuel nozzle sh...