How Free is a Free Drive Train??
08-01-2004, 09:51 PM
#2
If you spin a drive train with the wheels on and it rotates on its own and "glides" to a stop, it is free. You can do a ton of work to get it more free than that, but getting it to that initial point is the most important.
If you spin the drivetrain and it seems to suddenly stop instead of gradually stopping, or if it is difficult to "roll" the spur gear with your finger, then there is something wrong and it needs to be freed up.
If you spin the drivetrain and it seems to suddenly stop instead of gradually stopping, or if it is difficult to "roll" the spur gear with your finger, then there is something wrong and it needs to be freed up.
08-01-2004, 10:15 PM
#3
you should be able to breath on it wrong, and it will roll...
, no but seriously, what Shane said is correct...
, no but seriously, what Shane said is correct...
08-01-2004, 10:26 PM
#4
Originally posted by futureal
If you spin a drive train with the wheels on and it rotates on its own and "glides" to a stop, it is free. You can do a ton of work to get it more free than that, but getting it to that initial point is the most important.
If you spin the drivetrain and it seems to suddenly stop instead of gradually stopping, or if it is difficult to "roll" the spur gear with your finger, then there is something wrong and it needs to be freed up.
If you spin a drive train with the wheels on and it rotates on its own and "glides" to a stop, it is free. You can do a ton of work to get it more free than that, but getting it to that initial point is the most important.
If you spin the drivetrain and it seems to suddenly stop instead of gradually stopping, or if it is difficult to "roll" the spur gear with your finger, then there is something wrong and it needs to be freed up.
08-01-2004, 10:30 PM
#5
Do not mistake inertia as a measurement of a free drive train.
A drive train will spin for a long time the heavier it is due to the momentum generated by the rotating parts.
Take the wheels off a car and spin the drive train again and it doesn't spin as long.
You get the idea...
A drive train will spin for a long time the heavier it is due to the momentum generated by the rotating parts.
Take the wheels off a car and spin the drive train again and it doesn't spin as long.
You get the idea...
08-01-2004, 10:48 PM
#6
If the drive train moves when you blow on it without the wheels, it's free.
08-01-2004, 10:52 PM
#7
you guys are probably more experienced than I am, but what I do to check how "free" everything is, is this....
spin each cvd individually to eliminate any problems there...
they should be very smooth and no resistance....
then I take the shaft out and check the rear diff by setting my finger on the spur and turning it slowly... so that I can FEEL for any bad spots... kinda like someone trying to pick a combo lock...lol usually there will be one or two spots of resistance.. on my tc3 its always the small bevel gear being out of center..
after that is smoothed out I then do the same with the front diff....
check one thing at a time and use the process of elimination..
maybe thats taking it too far but its how I do it...lol
spin each cvd individually to eliminate any problems there...
they should be very smooth and no resistance....
then I take the shaft out and check the rear diff by setting my finger on the spur and turning it slowly... so that I can FEEL for any bad spots... kinda like someone trying to pick a combo lock...lol usually there will be one or two spots of resistance.. on my tc3 its always the small bevel gear being out of center..
after that is smoothed out I then do the same with the front diff....
check one thing at a time and use the process of elimination..
maybe thats taking it too far but its how I do it...lol
08-01-2004, 11:15 PM
#8
Originally posted by Neil Rabara
If the drive train moves when you blow on it without the wheels, it's free.
If the drive train moves when you blow on it without the wheels, it's free.
08-01-2004, 11:20 PM
#9
Free drive-train
My SD spins about 7 secs with tyres on it, but I heard Masami's does about 20 secs.
08-01-2004, 11:22 PM
#10
masami's probably spins for a couple of days, but that is just because he is Masami and he is the Bomb Digity, YO!!! (damn I love saying that)
08-01-2004, 11:26 PM
#11
Tech Master
Originally posted by =MisFitz= NuKe
masami's probably spins for a couple of days
masami's probably spins for a couple of days
08-01-2004, 11:29 PM
#12
Originally posted by =MisFitz= NuKe
masami's probably spins for a couple of days, but that is just because he is Masami and he is the Bomb Digity, YO!!! (damn I love saying that)
masami's probably spins for a couple of days, but that is just because he is Masami and he is the Bomb Digity, YO!!! (damn I love saying that)
08-02-2004, 12:10 AM
#13
Tech Regular
I've seen Lex Tyler's drive train (TC3) and it spins for 30 seconds no problem. I've heard he and some of the guys at RC Tech timed it once when he really got into it and it did 1:20. I didn't believe it until I saw for myself. Pretty impressive.
08-02-2004, 12:13 AM
#14
Wait, how do you get it that smooth?
and
When you say "spin the drivetrain" you mean open the throttle up full and then let go, right?
and
When you say "spin the drivetrain" you mean open the throttle up full and then let go, right?
08-02-2004, 12:27 AM
#15
Tech Master
Donoman:
Take off the pinion gear. Spin the rear wheels or whatever as hard as you can. That's how I do it.
Take off the pinion gear. Spin the rear wheels or whatever as hard as you can. That's how I do it.