Originally Posted by
mikedw
I'd have to count them but, 43 teeth sounds right. As I recall the original pitch ball diff spur gears came in 41, 43 and 44 so, 43 is probably the stock diff.
I prefer the disc dampers but, an oil top shock is much more adjustable than the stock friction top shock. You can run both if you want. I use silicon oil of different weights on the disc damper.
Not sure if this is happening to you but, the front tires have a tendency to roll over themselves on high speed corners, this will make the rear hop. Tire tape or gluing the front tires on the rims will stop this.
Thanks, mikedw. I read it was 44T but I guess I will find out soon enough. I converted my LM's motor position to 7-8teeth last night in prep for the ball-diff coming soon. I ran with 7teeth yesterday on my MR03EV LM. I like it.
The 8teeth provided no motor braking, so I didn't like it on my track. I also figured out using GreenSlime on the o-ring to stiffen the gear diff was the problem. Like AW grease, it's too thick. The cheap Tamiya grease seems to work the best. I opened up both diffs last night and the clear o-rings show no sign of wear.
Thanks on the roll damper and damper insight. The front tires seem to be on the wheel okay, I think I need to put a thin sleeve inside the friction damper to slow it down some more with the AW grease.
UPDATE:
On my MR03VE (LM) I got the PN LM ball diff using 9t and 10t (64pitch) to fit the factory motor mount using the factory 7-8t pinion setting. For now, I am running the PN's 10t, as I have the speed I want running brushless. Lost motor drag braking though as it is between 8t and 9t on factory gearing, but I guess I will just need to change my driving style. The car runs PN RSF25 front/Factory rear tire setup. There is a bit too much twist in the chassis so I will upgrade to the Kyosho roll damper setup and carbon fiber plate. Besides this, I am real happy with my car now.
On my MR03-S (MM 98mm), I am happy the way the car drives. Basically a stock setup using 9t pinion, bearings, PN RSF25/RSR06 tires, clear Tamiya o-ring with a light dab of grease inside the factory diff, 800HV Orion batteries and the AM-Pro charger. Thing is super fun to drive!!
For me, no other parts needed. I am doing a duplicate later today for my other MR03-S chassis running the 599XX body.