|
| LinkBack | Thread Tools | Display Modes |
11-02-2019, 09:36 PM | #1 |
Newbie Join Date: Apr 2014 Location: Bend, OR
Posts: 28
| Sticky Suspension - Initial movement stiction
I recently bought a (used) TRX-4, it's in pretty great shape and doesn't appear to have been used much. It works really well for the most part, but there's one thing about it that bothers me, the suspension seems to have a lot of stiction. If it's been sitting for more than a long moment, if i try to move the suspension, it takes quite a bit of force until it breaks free. Once it's free, it moves more easily but doesn't take long before it "takes a set" again. Even when broken free, it's still not very fluid. If i lift it to the top of it's travel, and let it go, it doesn't settle back down any. If i press it to bottomed out, it barely rebounds. Seems like there's a lot of drag. Any suggestions? |
Sponsored Links | |
11-02-2019, 09:37 PM | #2 |
Newbie Join Date: Aug 2019 Location: Saskatoon
Posts: 29
| Re: Sticky Suspension - Initial movement stiction
Could be heavy oil in the suspension. I'd say just disassemble things and inspect it Sent from my SM-N960W using Tapatalk |
11-02-2019, 10:07 PM | #3 |
Quarry Creeper Join Date: Nov 2018 Location: Oakley
Posts: 479
| Re: Sticky Suspension - Initial movement stiction
Get some oring lube. Then, if its still an issue, i have heard of people loosening the bottom cap slightly to released compression on the orings.
|
11-02-2019, 11:05 PM | #4 |
Rock Crawler Join Date: Feb 2012 Location: Michigan
Posts: 617
| Re: Sticky Suspension - Initial movement stiction
It's the black spacer between the two blue o-rings. They are too long and make the o-rings squeeze the shafts too tight. You can sand the spacers down about .1mm or you can get Traxxas 2362 shock rebuild kit and use the white spacer.
|
11-03-2019, 06:45 AM | #5 |
Quarry Creeper Join Date: Feb 2008 Location: US
Posts: 401
| Re: Sticky Suspension - Initial movement stiction
I just picked up a used trx sport myself. I had the same problem. Check YouTube there are quite a few videos about rebuilding the shocks. For me I greased the lower o ring and tightened the lower shock body cap till snug but not super tight. As the poster above said it’s from squeezing too much and the o rings grab the shock shaft too snug. I didn’t know about sanding the spacer or using a thinner one. That sounds like a much better solution that loosening the lower cap as it will probably leak at some point.
|
11-03-2019, 08:27 AM | #6 |
Rock Crawler Join Date: Jun 2015 Location: In the Sticks in the Ozarks
Posts: 940
| Re: Sticky Suspension - Initial movement stiction
I unscrewed the lower caps and put a little pipe-thread tape (teflon?) on the threads. That way it seals the caps and lets me just snug them against the o-ring pack, and keeps them from loosening any further. That eliminated the stiction problem for mine and it was a cheap fix. I'm also running 10-wt oil in the shocks .... without leaks. jim |
11-03-2019, 08:34 AM | #7 |
Newbie Join Date: Apr 2014 Location: Bend, OR
Posts: 28
| Re: Sticky Suspension - Initial movement stiction
Great, thanks for the help! Ill get into those shocks soon. The difference in supple articulation was clear when seeing the trx running side by side with my well worn wraith.
|
11-03-2019, 09:26 AM | #8 |
I wanna be Dave Join Date: Feb 2017 Location: My mothers basement
Posts: 2,128
| Re: Sticky Suspension - Initial movement stiction
Could be they just filled them with the wronk type of oil. I would just disassemble, soak and clean the internals, the reassemble with silicone shock oil. Before I tried sanding stuff I can't easily undo My trx-4 shocks never stick.all I did was pull them out of the box... Sent from my SM-N950U using Tapatalk Last edited by Voodoobrew; 11-03-2019 at 09:28 AM. |
11-03-2019, 03:34 PM | #9 |
I wanna be Dave Join Date: Aug 2004 Location: central VT
Posts: 2,301
| Re: Sticky Suspension - Initial movement stiction
The whole shock stiction issue is a well documented problem since the release of the GTS shocks with the TRX4. The best long term solution id using a thinner spacer between the seals, but there are other ways, such as loosening the lower cap, to reduce the stiction.
|
11-04-2019, 07:54 AM | #10 |
Newbie Join Date: Apr 2014 Location: Bend, OR
Posts: 28
| Re: Sticky Suspension - Initial movement stiction
Took dthings apart, some funny stuff going on in there like different o rings. I guess that's the risk of buying used. The ball-ends on the bottom of the shock shafts are siezed up and very difficult to swivel, probably contributing to the problem. Can i buy those without getting unneeded parts like caps and spring seats?
|
Sticky Suspension - Initial movement stiction - Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
is this normal front suspension movement or just mine? | nate94gt | Axial SCX10 II | 2 | 06-09-2017 01:51 PM |
Suspension mod sticky? | ThreeQuarterElliptic | Axial SCX-10 | 0 | 10-10-2016 05:27 AM |
AX10 Front shock "Stiction" | zoojunkie | Axial AX-10 Scorpion | 4 | 08-27-2008 05:02 PM |
movement of 4 link suspension. | super mud | Newbie General | 3 | 08-25-2008 07:38 PM |
driveshaft movement | dreadshawn | Traxxas Crawlers | 4 | 10-24-2005 06:49 AM |
| |