R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

Reply
 
Thread Tools Search this Thread
Old 02-24-2004, 08:33 PM   #1
Tech Addict
 
A_Stratus's Avatar
 
Join Date: Jun 2003
Location: Windsor, Ontario
Posts: 740
Default TC3- front diff and input shaft problem

Hello, I was just looking over my TC3 and noticed a problem! The front input shaft assembly is acting pretty rough on the front diff. I can turn the assembly about half way then it get's pretty tough to turn. It's not a smooth motion where I can spin it like the rear... Please give me some ideas on how to fix my problem.

Aaron
A_Stratus is offline   Reply With Quote
Old 02-24-2004, 08:42 PM   #2
Tech Elite
 
lee82gx's Avatar
 
Join Date: Nov 2002
Location: Land Of peace , Malaysia
Posts: 2,304
Trader Rating: 1 (100%+)
Default

sounds like you have stripped the front bevel gears.
happened to me.
lee82gx is offline   Reply With Quote
Old 02-24-2004, 09:14 PM   #3
Tech Apprentice
 
Join Date: Jan 2004
Location: The Bay
Posts: 61
Default

sometimes what happens is when u tighten the diff case screws on the bottom tighten them in a cross pattern or the diff case will tweak.seems like it should happen all the time if its tweaked though. i loosened my screws on the bottom of the diff case and slowly and evenly tightened them down.and it spun perfectly. and another thing is check for rocks or burrs on the pinion ring gears and pinchined bearings in the diff cases.
MarchTC3 is offline   Reply With Quote
Old 02-24-2004, 09:16 PM   #4
Tech Addict
 
RichChang's Avatar
 
Join Date: Jan 2002
Location: Ann Arbor, MI
Posts: 587
Default

You need to narrow down where the problem is by methodically removing pieces of the tranny from the equation. I'd start by pulling the main drive shaft out. Then, pop off the front camber links at the shock tower so that the C-hubs can tilt out. This allows the axles to come out of the diff out-drives.

Now spin the input cup and see if you still have the lumpy problem.

- If you still do, then pull the top diff half off and remove the diff assembly and input shaft assembly. Spin each separately on their bearings to see if you have a blown bearing (if you race on carpet you may have a lump of carpet stuck in a bearing).

- If you don't, then you probably have a bad bearing(s) in a steering knuckle.

Anyways, that should give you a start.

-Rich
RichChang is offline   Reply With Quote
Old 02-24-2004, 09:30 PM   #5
Tech Addict
 
A_Stratus's Avatar
 
Join Date: Jun 2003
Location: Windsor, Ontario
Posts: 740
Default

Well, The diff spins freely with just the diff in there...but when the input shaft goes on it, it is the rough feeling like I listed above. The input shaft spins freely when it's by itself too...

Aaron
A_Stratus is offline   Reply With Quote
Old 02-24-2004, 09:33 PM   #6
Tech Addict
 
RichChang's Avatar
 
Join Date: Jan 2002
Location: Ann Arbor, MI
Posts: 587
Default

Check what lee82gx and MarchTC3 brought up then.

Sounds like the gear mesh is off at certain spots. I'd make sure the bevel gear on the input shaft is on straight, too.

-Rich
RichChang is offline   Reply With Quote
Old 02-24-2004, 09:45 PM   #7
Tech Apprentice
 
Join Date: Jan 2004
Location: The Bay
Posts: 61
Default

another thing to check is excess flashing sticking out from the side or the diff that hits the pin on the pinion gear. This would cause it to stick in certain spots when the pin hits the flashing. ill try to get a pic in if my cameras working to show u
MarchTC3 is offline   Reply With Quote
Old 02-24-2004, 09:46 PM   #8
Tech Master
 
Speedie's Avatar
 
Join Date: Feb 2003
Location: Wisconsin
Posts: 1,844
Default

Id lean towards a mesh problem. take a shim out and try it then another till you have just slight play in the gears. If that dont help spin them with the case open and make sure they are not bent.
__________________
www.victoryhobbies.com Greenbay, Wisconsin
Speedie is offline   Reply With Quote
Old 02-24-2004, 09:57 PM   #9
Tech Addict
 
A_Stratus's Avatar
 
Join Date: Jun 2003
Location: Windsor, Ontario
Posts: 740
Default

I don't think it has anything to do with the rear because it free. I checked it all and I'm 110% it's in the front. I will try your ideas out and let you know how they worked in the morning.

Thanks for all fast respnses!
Aaron
A_Stratus is offline   Reply With Quote
Old 02-24-2004, 10:06 PM   #10
Tech Fanatic
 
Join Date: Sep 2003
Location: Irvine California
Posts: 870
Send a message via AIM to Bubblestc3 Send a message via Yahoo to Bubblestc3
Default

You have a diff in the front, right?

If so, the ring gear(big one) could be off center on the diff, and when in the case have a "wobble". To solve this, I would replace the front ring gear, and make sure that the gear does not "wobble" when spun in the case. I had this problem on my parking lot TC3, and replacing that ring gear fixed the problem right away...
Bubblestc3 is offline   Reply With Quote
Old 02-25-2004, 05:58 AM   #11
Tech Fanatic
 
kt racing's Avatar
 
Join Date: Jul 2003
Location: va
Posts: 848
Send a message via AIM to kt racing
Default

I would also check the bearings on the diff and on the input shaft. they could be worn and causing the problem as well. And also the input shaft has shims on it. If the shaft is to tight in the diff case it will bind. Some time just putting the diff or the shaft in the case won't put the pressure on the bearing and it will feel fine. So make sure you put some pressure on the bearings when you test them. You can use a pencil for the shaft bearings. and a punch for the diff bearings. Hope that helps.
kt racing is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
B4/T4 trans with fresh rebuild and lightweight input shaft ManicRC R/C Items: For Sale/Trade 4 01-15-2008 05:53 AM
MTX-4 lightwieght 2 speed shaft and front shaft rcfoolz R/C Items: For Sale/Trade 5 05-26-2007 10:15 PM
PRO4 16T ONE-PIECE FRONT BEVEL GEAR - INPUT SHAFT rc-zombies R/C Items: For Sale/Trade 0 08-24-2005 12:53 PM
Hardcore Racing TC3 Diff Outdrives & Input shaft Cups dr_hfuhuhurr R/C Items: For Sale/Trade 1 10-11-2004 10:00 PM
NEW Diggity Designs TC3 Drive shaft/Input combo...check it out! Brian McGreevy Electric On-Road 5 03-15-2004 01:13 AM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 01:51 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net