Fun on the sand dunes at Pismo Beach, & front skid plate thrashed - Jeep Garage - Jeep Forum

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  #1  
Old 06-13-2015, 01:56 PM
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Fun on the sand dunes at Pismo Beach, & front skid plate thrashed

My wife the copilot and I drove down to Pismo Beach yesterday for a day on the dunes. It's a 3-hr drive from home. I've been wanting to practice and learn how to drive on sand.

The skies were overcast. This is important because without a harsh sun, no shadows were thrown on the dunes and it's much harder to see the drop offs and witches eyes - they're easy to miss in that lighting.

I did not air down. I stayed at 36psi all around. Two reasons: to see what my rig is capable of at street pressures, and because the /50 low profile tires don't offer much protection to the wheels. I'm still running the OEM Forteras, a street tire. They have 19K miles on them. I figured that if I started getting bogged down, I would stop and air down then. I never needed to air down and was able to go deep along the back fence to post #17. The rig did okay at 36psi and probably would have done better at 12-15psi.

Here's a map of the place: http://ohv.parks.ca.gov/pages/1170/f...n-Download.pdf. Post #17 is halfway down on the right.

I kept it in 4-LO and we did okay. 4-HI I think would not be good enough. Opinions?

When the Forteras wear out I will get taller AT tires, and airing those down I'll be able to climb steeper dunes. But for now, my first time back in the dunes, it was good enough.

I had one mishap. In some soft bumpy sand I needed to keep my momentum up and the rig started bouncing, front end then back end, a few times like a bucking bronco. One time the front end went in and the front skid plate scooped a bunch of sand like a shovel, and all mounting bolts except one tore off. The skid plate hung down, dragging, held on by one bolt at the rear. I removed it. And the soft black shroud underneath the front end also tore, so I removed the remaing four bolts and a few clips holding it. I'm wondering, if I had aired down, if I could've driven more slowly without worrying about getting stuck in the sand? I wanted to keep my speed up for fear of getting bogged down. Hard to tell.

The picture shows my wife holding the skid plate. The shroud wasn't removed yet but you can't see it hanging down. Our dog, Dusty Rose, is a Chesapeake Bay Retriever and she rides in a crate in the back. She's a road-tripping trooper.

All in all a fun day, I learned a lot and I can't wait to go back! I want to get back to the vent pipe and post #25.
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  #2  
Old 06-13-2015, 02:00 PM
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Re: Fun on the sand dunes at Pismo Beach, & front skid plate thrashed

Here's a picture by post #17.
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Old 06-13-2015, 06:00 PM
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Re: Fun on the sand dunes at Pismo Beach, & front skid plate thrashed

LOL. I didn't look at the image yet and was wondering where you read post #17.... Then I looked at the image and had my aha moment.


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Old 06-13-2015, 06:17 PM
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Re: Fun on the sand dunes at Pismo Beach, & front skid plate thrashed

Nice, thanks for sharing, and next time lower the pressure to 20 psi and you should do even better.
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Old 06-13-2015, 08:30 PM
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Re: Fun on the sand dunes at Pismo Beach, & front skid plate thrashed

20 psi makes it much easier....and its easier on the vehicle. And if people are driving in the sand behind you they'd appreciate it if you'd drop down to 20 also. Full psi in the tires while driving makes the sand tracks bumpier than proper psi (20psi)

Having said that I've seen beaches where a car could drive on the sand because it was packed down so well.

It's always been my experience that while you can get through some beaches without airing down it makes for much easier driving at 20....
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Old 06-14-2015, 01:29 AM
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Re: Fun on the sand dunes at Pismo Beach, & front skid plate thrashed

Another jeep with the stupid cardboard under tray ripped off....

It still staggers me that Jeep got so much of the design of the Grand Cherokee right, yet still managed to get stuff like the under tray soooo wrong. What Jeep idiot thought cardboard would be OK?


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Old 06-14-2015, 07:50 AM
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Quote:
Originally Posted by GMWK2 View Post
Another jeep with the stupid cardboard under tray ripped off....

It still staggers me that Jeep got so much of the design of the Grand Cherokee right, yet still managed to get stuff like the under tray soooo wrong. What Jeep idiot thought cardboard would be OK?

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The one that knows the majority of jgc owners will never take it off road.

Mine was off road the first week we owned it, but is not something I intend to do often, until it is older anyway. The Scrambler is my off road toy.
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Old 06-14-2015, 08:52 AM
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Re: Fun on the sand dunes at Pismo Beach, & front skid plate thrashed

Cool--The plate did its job perfectly and is an easy, inexpensive part to replace. Deflation is great if you get stuck. Going slow, very slow over challenging terrain of any kind is the best way forward. #Afghanistan
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Old 06-15-2015, 05:34 AM
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Re: Fun on the sand dunes at Pismo Beach, & front skid plate thrashed

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Originally Posted by vikingmariner View Post
Cool--The plate did its job perfectly and is an easy, inexpensive part to replace.
I was trying to explain how the plate did not do its job, and only became a liability. I think if the plate wasn't there in the first place, there would not have been any damage done to the undercarriage.

I now need a front skid plate system, maybe multiple plates that include something like RRO's prerunner front end plate.

I also do not have Dom's DEF injector protective plate, and I've been offroad several times in the dry and in the mud, and have driven through lots of water, and the DEF injector is fine. As I've posted elsewhere, the injector looks well protected.

Now, back to figuring out what plates to get... When I was underneath removing the front plate, it looked like many other parts are vulnerable. So I need a system of skid plates and rock rails to provide comprehensive protection. And all have to fit together. I need to do some research on that.
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Old 06-15-2015, 05:42 AM
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Re: Fun on the sand dunes at Pismo Beach, & front skid plate thrashed

Quote:
Originally Posted by Victor1960 View Post
Nice, thanks for sharing, and next time lower the pressure to 20 psi and you should do even better.
Quote:
Originally Posted by dubwarren View Post
20 psi makes it much easier....and its easier on the vehicle. And if people are driving in the sand behind you they'd appreciate it if you'd drop down to 20 also. Full psi in the tires while driving makes the sand tracks bumpier than proper psi (20psi)

Having said that I've seen beaches where a car could drive on the sand because it was packed down so well.

It's always been my experience that while you can get through some beaches without airing down it makes for much easier driving at 20....
Quote:
Originally Posted by vikingmariner View Post
Going slow, very slow over challenging terrain of any kind is the best way forward. #Afghanistan
Thanks guys, and yes, next time I will air down and go slower. I was nervous about going slow because the sand was so soft back in the dunes, I didn't want to get stuck.
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Old 06-15-2015, 05:53 AM
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Re: Fun on the sand dunes at Pismo Beach, & front skid plate thrashed

Quote:
Originally Posted by CJ8Rockcrawler View Post
The one that knows the majority of jgc owners will never take it off road.

Mine was off road the first week we owned it, but is not something I intend to do often, until it is older anyway. The Scrambler is my off road toy.
Your Scrambler is cool as a dedicated offroad toy. For me, my JGC is my do-it-all Swiss Army Knife rig -- daily driver, commuter, road trip traveler, and offroad explorer, all in the lap of leather luxury. I need to make it a little more offroad capable and then it'll be all set up. My expedition dreams include driving north to Alaska, to Prudhoe Bay, and also south to the Darien Gap at Yaviza, Panama.
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  #12  
Old 06-15-2015, 07:50 AM
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Re: Fun on the sand dunes at Pismo Beach, & front skid plate thrashed

In previous jeeps such as my 2003, I ran in 4-lo on sand because the front and rear diffs were mechanically locked. However that is not the case for the current generation of jeeps. I see no advantage in running in 4-lo on sand now.
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