06-26-2016, 08:21 AM
(06-26-2016, 05:55 AM)Michtrackerproject Wrote: Ok hello after some time away.. back to transmission questions finally got to drive the 91 tracker on a proper road,, But I have no idea what normal is for these 3spd transmission it seems to not being shifting into 3rd<> and the rpms at 55 are about 4k, what should I be looking for here as for shift points / rpm and final run out at speed .. ie can or if I will be able to drive freeway speeds at what rpms,>?the shift points are all based on rpm (tail governor device,deep inside) and load, load is vacuum to the vacuum modulator to rear of trans.
there are screens (tiny) that are part of the GOV and can clog.
http://www.fixkick.com/tranny/slush/governor.JPG
the shift points are also controlled by the TV cable, and if it jams out or the actual valve at rear same, shifting will be crazy late or never to 3rd.
as seen here part id 19
http://www.fixkick.com/tranny/slush/slid...-base1.jpg
the graphs for both transmissions are in the FSM.
and here is one.
if on flat ground, and easy right foot, it will up shift fast, due to huge vacuum at moD. (means no load)
and all this stuff above assumes the trans does not slip.
the book shows the graph for upshifts and down.
the 2>3 shift can be as low as 19mph.
if WOT< or max load,
it can be 71mile shift point.
page 28 in FSM chapter 7b
if the mod valve is ok.
if the TV detent valve dont leak
and trans dont slip.
and gov;. screens not packed up.
and if stall test pass.
and if line pressure is at spec.
then it will shift , under no load about 20mph into 3.
thats it . i think, good luck
http://www.fixkick.com