RCCrawler Forums

The ROC · 12-20-2007, 05:57 AM

Hello,

Not sure of the proper terminolgy but when my Scorpion is standing still I am able to roll it forward or backwards a couple of inches by hand before the drive train locks into place. I assume this is normal but is there anyway of reducing the amount of roll or even better eliminating it all together? My Scorpion is in stock form.

Thanks.

firstumustcrawl · 12-20-2007, 06:13 AM

mine does the same... if you really go piece by piece each thing has a little play just so everything can roll smoothly but when you add it all up on the entire truck it turns into alot ..not sure of a fix but check your motors alignment if theres to much play in the pinion and the drive gear that would cause a great amount of it..

steven9026 · 12-20-2007, 06:42 AM

Mine does the same thing, but I don't seem to notice it when I'm crawling. I saw a post somewhere on here where someone mentioned a few ways to tighten it up. I haven't been able to find the link. Since it didn't seem to make a difference when I was running mine, I have just left it alone.

binaryterror · 12-20-2007, 07:08 AM

Check for slop thats what the problem is.

If you search this forum there are many tips and ideas to fix the problem. Try searching for Drivetrain play or slop.

The main piece of the puzzle is the Ring/Pinion of the stock kit. The upgraded one might help solve this issue as it is machined out of superior metal. The other issue is the Axle to locker slop. This can be solved by either shimming the fit with tin foil or buying the RC4WD Tracgear set up (which I believe also helps fit the Ring/Pinion fit without buying the upgraded Ring/Pinion from Axial).

Thad Garner · 12-20-2007, 08:47 AM

I would say the only place you don’t want drive train backlash would be where the dogbone plugs into the aluminum spool/locker. I put red locktite on the flat spots before sliding the dogbone into the spool. The locktite will harden, fill any gaps and you’ll still be able to yank them out for maintenance.

yotachump · 12-20-2007, 10:08 AM

ring and pinion slop, is a lot of it. if you buy the HD ring and pinion set it will reduce the slop.

cato · 12-20-2007, 10:09 AM

Alot of the slop can be removed by upgrading the drive train. Staight axles in the rear helps alot(ton of slop in dog-bone set-up) The new HD ring and pinion will help alot as well, it eliminates the floating locker. I'm still waitin on CVD for the front witch will eliminate a bunch more. But with just those changes yould be amazed how much is eliminated. Good luck...

The ROC · 12-20-2007, 12:23 PM

Thanks for the advice and the terminolgy "slop or drivetrain play" is what I was looking for.

Cheers.

RivBlueNoma · 12-20-2007, 12:46 PM

Quote:

Originally Posted by cato

I'm still waitin on CVD for the front witch will eliminate a bunch more.

RC4WD already has the "XVD" available

http://rc4wdstore.com/product_info.p...roducts_id=715

Currently sold out, but Ill bet they will get more in stock soon.

Anthony.L · 12-20-2007, 01:00 PM

Actually the XVD for the Axial has a design flaw and they are going back to the drawing boards, see the thread in the vendor's market.

I've yet to find a place where the slop has caused me trouble or points in a comp. Most of it is in the dogbone outdrives and the stock alum axle locker.

gadge · 12-20-2007, 02:22 PM

has anyone tried shiming the ring gear or pinion...(maybe w traxxas .5m teflon shims..from pede xmn pn 1985) i saw thead where someone had a clicking from axle turned out that pinion brng wasnt seated so pinion might not be a good idea maybe ring gear would be the place to start...if u really cant deal with it...sorry dont know of larger shims..

RivBlueNoma · 12-20-2007, 02:27 PM

Quote:

Originally Posted by Anthony.L

Actually the XVD for the Axial has a design flaw and they are going back to the drawing boards, see the thread in the vendor's market.

Well thats great, I just bought a set on monday.

roninwarrior555 · 12-20-2007, 02:35 PM

you don't want a play in the drive train but you do want it to move freely. tomuch slop will cause premature wear but if it's to tight the you'll end up scrubing some thing else.... one step at a time....

cato · 12-20-2007, 02:50 PM

Riv: where'ld you find them? Every time I look, they're "out of stock"

RivBlueNoma · 12-20-2007, 03:10 PM

Found them on rc4wd's site. They didnt show out of stock on monday so I ordered a set. By tuesday they showed being out of stock.

grapegoat · 12-20-2007, 03:29 PM

If you put a small washer behind the pinion it will mesh the R&P gears better and reduces the front to back slop. If you wrap the ends of your axle shafts with a little tin foil before sliding the axle into the locker it reduces side to side slop. This has been discussed a few times before. SEARCH!

12-20-2007, 05:57 AM	#1
The ROC Newbie Join Date: Sep 2007 Location: Toronto Posts: 4	How do I reduce the foward and backwards roll?? Hello, Not sure of the proper terminolgy but when my Scorpion is standing still I am able to roll it forward or backwards a couple of inches by hand before the drive train locks into place. I assume this is normal but is there anyway of reducing the amount of roll or even better eliminating it all together? My Scorpion is in stock form. Thanks.

12-20-2007, 06:13 AM	#2
firstumustcrawl Quarry Creeper Join Date: Jan 2004 Location: Long Island NY. Posts: 397	mine does the same... if you really go piece by piece each thing has a little play just so everything can roll smoothly but when you add it all up on the entire truck it turns into alot ..not sure of a fix but check your motors alignment if theres to much play in the pinion and the drive gear that would cause a great amount of it..

12-20-2007, 06:42 AM	#3
steven9026 Newbie Join Date: Oct 2007 Location: Lexington, S.C. Posts: 39	Mine does the same thing, but I don't seem to notice it when I'm crawling. I saw a post somewhere on here where someone mentioned a few ways to tighten it up. I haven't been able to find the link. Since it didn't seem to make a difference when I was running mine, I have just left it alone.

12-20-2007, 07:08 AM	#4
binaryterror I wanna be Dave Join Date: Jan 2004 Location: Detroit Posts: 3,583	Check for slop thats what the problem is. If you search this forum there are many tips and ideas to fix the problem. Try searching for Drivetrain play or slop. The main piece of the puzzle is the Ring/Pinion of the stock kit. The upgraded one might help solve this issue as it is machined out of superior metal. The other issue is the Axle to locker slop. This can be solved by either shimming the fit with tin foil or buying the RC4WD Tracgear set up (which I believe also helps fit the Ring/Pinion fit without buying the upgraded Ring/Pinion from Axial).

12-20-2007, 08:47 AM	#5
Thad Garner Rock Stacker Join Date: Mar 2007 Location: Lake Forest Posts: 63	I would say the only place you don’t want drive train backlash would be where the dogbone plugs into the aluminum spool/locker. I put red locktite on the flat spots before sliding the dogbone into the spool. The locktite will harden, fill any gaps and you’ll still be able to yank them out for maintenance.

12-20-2007, 10:08 AM	#6
yotachump ghetto fabulous newbie Join Date: Sep 2007 Location: with your mom Posts: 2,526	ring and pinion slop, is a lot of it. if you buy the HD ring and pinion set it will reduce the slop.

12-20-2007, 10:09 AM	#7
cato RCC Addict Join Date: Sep 2007 Location: WHEAT RIDGE, CO Posts: 1,102	Alot of the slop can be removed by upgrading the drive train. Staight axles in the rear helps alot(ton of slop in dog-bone set-up) The new HD ring and pinion will help alot as well, it eliminates the floating locker. I'm still waitin on CVD for the front witch will eliminate a bunch more. But with just those changes yould be amazed how much is eliminated. Good luck...

12-20-2007, 12:23 PM	#8
The ROC Newbie Join Date: Sep 2007 Location: Toronto Posts: 4	Thanks for the advice and the terminolgy "slop or drivetrain play" is what I was looking for. Cheers.

12-20-2007, 01:00 PM	#10
Anthony.L Newbie Join Date: Nov 2007 Location: Seattle, WA Posts: 46	Actually the XVD for the Axial has a design flaw and they are going back to the drawing boards, see the thread in the vendor's market. I've yet to find a place where the slop has caused me trouble or points in a comp. Most of it is in the dogbone outdrives and the stock alum axle locker.

12-20-2007, 02:22 PM	#11
gadge Quarry Creeper Join Date: Nov 2007 Location: in the shop, of corse! Posts: 361	has anyone tried shiming the ring gear or pinion...(maybe w traxxas .5m teflon shims..from pede xmn pn 1985) i saw thead where someone had a clicking from axle turned out that pinion brng wasnt seated so pinion might not be a good idea maybe ring gear would be the place to start...if u really cant deal with it...sorry dont know of larger shims..

12-20-2007, 02:35 PM	#13
roninwarrior555 Quarry Creeper Join Date: Nov 2007 Location: southender Posts: 239	you don't want a play in the drive train but you do want it to move freely. tomuch slop will cause premature wear but if it's to tight the you'll end up scrubing some thing else.... one step at a time....

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12-20-2007, 02:50 PM	#14
cato RCC Addict Join Date: Sep 2007 Location: WHEAT RIDGE, CO Posts: 1,102	Riv: where'ld you find them? Every time I look, they're "out of stock"

12-20-2007, 03:10 PM	#15
RivBlueNoma Rock Crawler Join Date: Feb 2006 Location: Cutting Comms Posts: 752	Found them on rc4wd's site. They didnt show out of stock on monday so I ordered a set. By tuesday they showed being out of stock.

12-20-2007, 03:29 PM	#16
grapegoat Rock Crawler Join Date: Apr 2007 Location: portland Posts: 584	If you put a small washer behind the pinion it will mesh the R&P gears better and reduces the front to back slop. If you wrap the ends of your axle shafts with a little tin foil before sliding the axle into the locker it reduces side to side slop. This has been discussed a few times before. SEARCH!

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Thread: How do I reduce the foward and backwards roll??