They don't "slip" anything when the accumulators are low.
When there is insufficient oil left to make up or down shifts the flow sensor spool drops down and disengages the Master Clutch until pressure is built in all three transmission clutch circuits then M/C pressure will be available again. This can happen during multiple quick shifts, up or down, even if the accumulators are fully charged.
This feature is the main reason the Magnum transmissions survive as well as they do.
Charging the accumulators is a routine maintenance item, low charge is not indicative of an internal transmission problem in any way.
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Today's Featured Article - When Push Comes to Shove - by Dave Patterson. When I was a “kid” (still am to a deree) about two I guess, my parents couldn’t find me one day. They were horrified (we lived by the railroad), my mother thought the worst: "He’s been run over by a train, he’s gone forever!" Where did they find me? Perched up on the seat of the tractor. I’d probably plowed about 3000 acres (in my head anyway) by the time they found me. This is where my love for tractors started and has only gotten worse in my tender 50 yrs on this “green planet”. I’m par
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