If I wanted to drain my tranny and refill it with the Redline MT90 and it
still has 1.5 quarts of the original tranny oil in there, will mixing the
original and synthetic oil cause any trouble? Or do you have the take the
tranny out and really drain it all out? Just something in the back of my mind
for next springs list of things to work on.

Bill H.
88 GL

--- Warren Lail <wlail@OU.EDU> wrote:

> Okay,  I just filled my 091 4-speed tranny with Redline MT90.   The tranny
> is out of the bus and was totally empty.
> I carefully leveled it and pumped in 3.7 US quarts, but it did not bring it
> up to the bottom of the fill hole.  So, I
> checked Bentley again and it says in a footnote that the capacities given
> are for a RE-fill because normally
> 1.5 quarts will remain in the tranny even after draining it (assuming, I
> think, that tranny is left in the vehicle
> and that the vehicle is level).

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