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Old 07-11-2014, 02:03 AM   #15
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In my experience today's shocks fail in bump first. All you need to do to check them is take the top fastener off and see if the rod just drops into the shock body or if when you push it it does so without making the palm of your hand hurt.

In rebound it usually takes a lot more force to pull the rod back out.

YMMV
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Old 07-11-2014, 10:07 AM   #16
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From one web site re bilstein shocks Frequently Asked Questions

Quote:
The strap that keeps the shock from being fully extended is either in the wrong place for installation or missing entirely. What should I do? On some Bilstein shocks, there is a packaging strap to keep the shock from extending all the way. The only reason for the existence of this strap is so that the shock will fit into a smaller box for shipping. The strap has absolutely nothing to do with installation of the shock itself, and should be removed prior to attempting to install the shock.
True that the absolute gas pressure inside the shock is very high - 350psi, but this acts on both sides of the "ram" so the external force extending the shock is not so high. Yes, bit of a pain to compress them by hand lying on your back under a vehicle.

Never had any success telling whether a shock is past its prime just by moving it by hand. The standard way by bouncing on the back fender of a car doesn't work with a 40' motorhome. Testing on a machine that measures resistance to motion over a range of frequencies would be the only reliable way and even then, unless the testing continues for long enough to heat up the fluid, the results aren't going to mean much.
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Old 07-18-2014, 10:22 AM   #17
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ok, got the upgraded shocks, came fully extended no straps

The 1 1/8 bottom bolt was hard to get off with the limited ground clearance, but other than that straight forward.

Will road test in a few days

side by side old & new same length, can't compress either by hand.

I have the two takeoffs if anyone is interested for $20 each, plenty of pressure in them with just 35,000 miles.
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Old 07-18-2014, 05:51 PM   #18
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Quote:
Originally Posted by jimbo2013 View Post
I have the two takeoffs if anyone is interested for $20 each, plenty of pressure in them with just 35,000 miles.

How are your tires? I have a full set of GY 670 take-offs with only 11,000 miles over the past 9 years. Even trade?


j/k
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Old 07-18-2014, 06:11 PM   #19
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you obviously don't understand the difference between tire age/use Vs shocks!
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Old 07-22-2014, 10:28 AM   #20
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Mounted top bolt, I used a std ratcheting cargo strap to compress them into place, very easy
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Old 07-27-2014, 11:19 AM   #21
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Just did a 20m test drive, a lot less rocking turning in/out driveways etc and nose diving on brakes at low speed

So worth the $$$
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Old 07-31-2014, 10:27 PM   #22
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did a 425 mile trip very satisfied with the difference.
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