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02-21-2012 | 07:08 PM

#10066

Pimpin

Tech Elite

iTrader: (32)

Joined: Jul 2009

Posts: 2,380

From: So Cal

Quote:

Originally Posted by CoyoteSlash

anyone have any preliminary suggestions on a Grinding in the Tranny>Slipper Setup? When I take off the cover it doesn't echo as bad but it sounds like something's grinding up against something every rotation.

- It did this with the Ball Diff and the Gear Diff
- And with the old Tranny case, and the new Tranny Case.
- Checked Spur and Pinion, perfect, pads, plates, fine.
- The only thing I see is the Topshaft is wobbling a bit. But it goes into the tranny smoothly.
- All bearings are solid and free spinning.

It's odd to me. It drives great, It's not causing any drag either. Only an extremely obnoxious "broke" noise.

check to make sure the long transmission screws arent hitting the back of the slipper plate.

02-21-2012 | 08:24 PM

#10067

BCbud

Tech Fanatic

iTrader: (37)

Joined: Sep 2009

Posts: 763

From: Victoria BC Canada

Gearing for my first off road race ever.

Good day!

I just bought an sc10 2wd last sunday and have been busy fixing all the things wrong with it. I am going to a my first off road race this weekend and would like some help with gearing. The motor is a castle 4600 4 polel and the speedo is a mamba max pro and it has a ball diff. The spur is an 81 tooth. The track was started to be put down today so the surface is anyones guess. Here is the layout of the track.

http://www.rctech.net/forum/10360644-post109.html

Thanks, Neil.

Last edited by BCbud; 02-22-2012 at 07:06 AM.

02-22-2012 | 12:32 AM

#10068

CoyoteSlash

iTrader: (8)

Joined: May 2011

Posts: 1,311

From: Portland, OR

Quote:

Originally Posted by njnewc

Can you take a quick video so we can hear the noise. Check the motor plate screws, if one is too long it could rub the slipper...

Transmission Screws are floppy loose, and the noise remains. Not the motor either.

Video:
http://imageshack.us/clip/my-videos/7/hv7.mp4/

02-22-2012 | 04:03 AM

#10069

TeKiNxRampage

Tech Adept

Joined: Jan 2012

Posts: 157

From: Peeing by a Nearby Bush,Michigan

Quote:

Originally Posted by CoyoteSlash

Transmission Screws are floppy loose, and the noise remains. Not the motor either.

Video:
http://imageshack.us/clip/my-videos/7/hv7.mp4/

Actually sounds cool,like a revving engine.
Don't really have a clue what it can be

02-22-2012 | 04:20 AM

#10070

J_Bone

Tech Master

iTrader: (8)

Joined: Dec 2004

Posts: 1,070

From: Mesa, AZ

Quote:

Originally Posted by CoyoteSlash

Transmission Screws are floppy loose, and the noise remains. Not the motor either.

Video:
http://imageshack.us/clip/my-videos/7/hv7.mp4/

I couldn't see the video on my phone but make sure the inside slipper plate isnt rubbing the motor plate.

02-22-2012 | 04:24 AM

#10071

CoyoteSlash

iTrader: (8)

Joined: May 2011

Posts: 1,311

From: Portland, OR

Quote:

Originally Posted by J_Bone

I couldn't see the video on my phone but make sure the inside slipper plate isnt rubbing the motor plate.

Nope.

It's not a metal screech grind. You'd have to listen. it's plastic tap at high speed is the best I can describe it.

02-22-2012 | 04:32 AM

#10072

B.A. Racer

Tech Master

iTrader: (10)

Joined: Apr 2009

Posts: 1,894

From: Indiana

Quote:

Originally Posted by CoyoteSlash

Nope.

It's not a metal screech grind. You'd have to listen. it's plastic tap at high speed is the best I can describe it.

check you diff and make sure you not missing something..it also sounds like a spun rotor on your motor...check your motor

02-22-2012 | 04:46 AM

#10073

CoyoteSlash

iTrader: (8)

Joined: May 2011

Posts: 1,311

From: Portland, OR

Quote:

Originally Posted by B.A. Racer

check you diff and make sure you not missing something..it also sounds like a spun rotor on your motor...check your motor

I said in my original question, that the ball diff and my brandnew gear diff both were present during this noise.

the motor spins great, no sound.

02-22-2012 | 04:48 AM

#10074

bds81175

Moderator

iTrader: (20)

Joined: Jan 2011

Posts: 2,745

From: Litchfield, Minnesota

It may sound great under load but it may cut loose with the pinion connected to the spur. Its a pretty horrific sound when I have heard it. Have you tried a different motor yet?

02-22-2012 | 04:53 AM

#10075

CoyoteSlash

iTrader: (8)

Joined: May 2011

Posts: 1,311

From: Portland, OR

Quote:

Originally Posted by bds81175

It may sound great under load but it may cut loose with the pinion connected to the spur. Its a pretty horrific sound when I have heard it. Have you tried a different motor yet?

The load being 3 gears and no tires on a bench?

02-22-2012 | 05:00 AM

#10076

bds81175

Moderator

iTrader: (20)

Joined: Jan 2011

Posts: 2,745

From: Litchfield, Minnesota

Its a huge load compared to just a pinion. Re-reading your post, if you have a bent top shaft it will make quite a racket too. We're throwing out suggestions here. Don't knock 'em til you've tried 'em.

02-22-2012 | 06:10 AM

#10077

gamedog1966

Tech Addict

Joined: Mar 2011

Posts: 550

From: Tacoma, wa

Quote:

Originally Posted by Ryno B4.1

Well your safe. A real addict would be in the car driving 4 hours to find another track. A true addict will get their drug at any cost

Hahahaha well when my track is down, my nearest is 40 min away and I'm down for the git down so 40 min later I'm running laps lol lol

02-22-2012 | 06:48 AM

#10078

CHIZZLE

Tech Elite

iTrader: (37)

Joined: Jan 2011

Posts: 2,291

From: Glendale, AZ

Quote:

Originally Posted by CoyoteSlash

Transmission Screws are floppy loose, and the noise remains. Not the motor either.

Video:
http://imageshack.us/clip/my-videos/7/hv7.mp4/

How tight is your gear mesh?

02-22-2012 | 07:59 AM

#10079

brent701

Tech Master

iTrader: (8)

Joined: Oct 2011

Posts: 1,590

Quote:

Originally Posted by TeKiNxRampage

Actually sounds cool,like a revving engine.
Don't really have a clue what it can be

Quote:

Originally Posted by CoyoteSlash

I said in my original question, that the ball diff and my brandnew gear diff both were present during this noise.

the motor spins great, no sound.

I am 80% sure it is the Mesh from the top shaft to the idler.

I have this same noise in my B4.1 tranny after I replaced the Idler and top shaft along with new Avid bearings. also tested with old bearings.
Even installed old parts back in noise gone. new parts noise back.

Not sure 100% what it is with the gears but I am pretty sure its the idler to top shaft gear mesh.
I also tested it with 2 different ball diffs and 2 different gear diff's same noise