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Thread: Pro sc 4x4 help!!

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Old 10-07-2017, 04:34 PM   #1
Join Date: Oct 2017
Posts: 3
Default Pro sc 4x4 help!!

So I just got into short course stuff. Only had the truck a week and love it!! But today it was driving good and then all of a sudden it won't really go. It may move a little bit but It just makes a whining noise and acts like something is bound up. I'm guessing I may have a bad gear somewhere? My spur gear is worn down a bit but not chewed to hell or broke. Any suggestions where to tear into first? Thanks
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Old 10-07-2017, 06:05 PM   #2
Join Date: Jul 2014
Location: Streamwood,IL
Posts: 258
Default Re: Pro sc 4x4 help!!

Sounds like you're on the right track. If the motor spins, and responds to the transmitter, then the problem has to be in the drivetrain. You mentioned the spur was worn, check the pinion also, check the mesh, tranny gears, might be stripped. Spurs don't cost that much, pick up another and see if that solves the issue.
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Old 10-07-2017, 06:09 PM   #3
Join Date: Oct 2017
Posts: 3
Default Re: Pro sc 4x4 help!!

Alright cool just wanted to make sure I was headed in the right direction. I had just placed an order that has a couple extra spur gears cuz I read they wear out fast so those should be here Monday or Tuesday. I hope that's all cuz I feel like I'm gonna die without being to drive it for 3 days haha but thanks for the confirmation on what I was thinking!
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Old 10-07-2017, 06:11 PM   #4
Join Date: Feb 2010
Location: Beckley WV
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Default Re: Pro sc 4x4 help!!

Could be a piece of debris somewhere in the drivetrain, a busted gear, or something as simple as the slipper being loose (you said it was making a whining noise). The first thing I would do is clean the truck and do a visual inspection. If nothing is obviously wrong then you'll need to dig deeper. Start with the spur, if it spins without causing any movement in the drivetrain then the slipper is your problem. If it does spin the drivetrain, listen for obvious sounds of debris in the diff cases. Also check all of the grub screws in the drivetrain, a loose grub screw could cause the symptoms you mentioned.
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Old 10-07-2017, 06:33 PM   #5
Join Date: Oct 2017
Posts: 3
Default Re: Pro sc 4x4 help!!

Cool I'll check all that out as well. I figured I may as well do a good cleaning while I'm checking stuff out so I'll dig in deeper and check what you mentioned. Thanks!
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