Originally Posted by
Biffff
Running a rsx gen2 8.5 combo in my 2wd sct.
Truck runs great... Smooth on start up for roughly 6/7 minutes. At that time it cogs slightly from a dead stop. Once moving it is perfectly smooth even at a slow crawl. As the truck seldom comes to stop while on track it poses no drivability issue. Motor temps at mid 160's and esc at 105 after a 15 minute run. I've had the motor apart several times but all seems well.
Once the truck cools it will run smooth Again on start up for 6/7 minutes. Since this started the motor has a different tone to it in the middle rpm range, but not at low rpm and not at wot.
Thoughts??
Turns out the bearing spun in the end cap. This removed some material from the bearing seat which pushed the bearing farther out. This allowed the rotor to move away from the sensors on the other end.
Not sure how or why the beRing spun in its seat as it is in perfect condition.
Quick fix was to take a couple thin motor spacers from an old motor to take up the space.
New end cap has been ordered.