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89xjgrey · 10-10-2008, 10:37 PM

Shocks with resistance on both the compression and rebound strokes are called what?

Shocks with resistance on compression, but rebound automatically are called what?

What is a 'monotube' shock?

Of the first two referenced, what is preferred offroad and why?

Thanks...

Kyle · 10-11-2008, 01:14 AM

I would contact jeepin jason regarding this subject, he is well versed in it.

**muddeprived** · 10-11-2008, 01:19 AM

Some stuff to read regarding shocks:

http://www.shockwarehouse.com/site/glossary.cfm

http://www.mobiloil.com/USA-English/MotorOil/Car_Care/Notes_From_The_Road/In_for_a_Shock.aspx

cosxjfan · 10-11-2008, 10:45 AM

FWIW, I have shocks on my truck that have no rebound (downward) dampning, and it sucks!! I have an 07 Nissan Titan, and the front wheels will drop right off of something and go all the way to the bottom with no dampning of the wheel at all. I see no off-road application for a shock that doesn't control compression and rebound. HTH!!

**Jeepin Jason** · 10-13-2008, 11:12 AM

Quote:

Originally Posted by 89xjgrey

Shocks with resistance on both the compression and rebound strokes are called what?

Shocks with resistance on compression, but rebound automatically are called what?

What is a 'monotube' shock?

Of the first two referenced, what is preferred offroad and why?

Thanks...

What you described first are hydro/hydraulic shocks, like the Doetsch Tech DT3000s, Rancho RS5000s, and other shocks like that. These are usually your lower-end, budget shocks.

Shocks that rebound automatically (they still provide resistance though) are called gas shocks, or sometimes "nitro" shocks, or gas-charged shocks, etc. These are going to be your Bilsteins, nearly all monotube shocks (and many twintubes), Old Man Emu shocks, etc. I believe that all factory Jeep shocks are gas shocks as well (every one I've seen has been anyway).

As far as which one is preferred, that just comes down to, well, personal preference, haha. Me personally, I prefer high pressure gas shocks. And I think most folks do too because nitro shocks are going to feel firmer than most hydro shocks, and they'll maintain control better because they won't aerate and cavitate like a hydro shock will during rapid cycling (ie: fast bumps, etc).

The first link that muddeprived posted has some good info on the technical differences.

Quote:

Originally Posted by cosxjfan

FWIW, I have shocks on my truck that have no rebound (downward) dampning, and it sucks!! I have an 07 Nissan Titan, and the front wheels will drop right off of something and go all the way to the bottom with no dampning of the wheel at all. I see no off-road application for a shock that doesn't control compression and rebound. HTH!!

Sounds like you've got busted shocks then... I can't imagine any shocks having no rebound dampening.

-Jason

cosxjfan · 10-13-2008, 05:33 PM

Quote:

Originally Posted by Jeepin Jason

Sounds like you've got busted shocks then... I can't imagine any shocks having no rebound dampening.

-Jason

Nope, I checked and that's how they are designed!! That is the only issue I have with this truck, other than that, it's a really great truck!! It is the second one that I've owned, and the first one did the same thing. I asked about it, and the dealer said it's the norm, so I guess I'll be getting some better shocks for the front at least, some time soon. I don't like the thud at the end of the stroke, it drives me crazy!! Thanks for the input JJ!!

89xjgrey · 10-13-2008, 09:34 PM

Thanks Jeepin Jason for that info. That answered my questions. I was more curious than anything else. Thanks again.

firehawk · 10-14-2008, 11:34 AM

I seem to remember that in drag racing they had what they called "90/10 shocks". They was 90% damping on extension, and only 10% on compression. It was to help keep the front end from raising up off the line, but allow it to come back down quickly. Someone correct me if I'm wrong.