It could be the lipo cut-off if the pack was bad, I know I had a pack with a dead cell and even fully charged under load it would cut with the lipo cutoff.
Throw the tamiya servo saver in the bin and either don't use one or buy a kimbrough.
I've noticed my 501 (and everybody else's at the club) is louder than my xray although it certainly isn't what I would consider as 'loud' just a bit noisier, no idea about reverse.
|