fluid low ? shift kit installed ? = a shit load of heat going through the box.
stress from the shift kit, as well as low liquid. top it up see how it goes.
same thing happened to me, solenoids were getting to hot and were just letting you know there is a cooling problem in the box.
Get the leak fixed asap, might just be a gasket (service is $130)
i was quoted $560 for new Solenoids, but also got quoted $1800 for Stage 2 rebuild including aftermarket solenoids..... guess which one i chose
good luck man
P.S if MV only opened it up 10,000 ago, i'd be asking them to check out the leak. maybe gasket wasn't on right ? or didn't seal good