Changed them out at 34k miles. Yep, all 4 would not rebound but I don't think that is an accurate way to measure if a shock is working properly.
A gas changed shock will rebound on it's own......unless it has lost it's charge.
__________________ 2011 F350 4x4 Crew Cab 6.7l White Job1: Access Cover, Ford Bed Mat, B&W with Companion, Transfer Flow 50 gal tank, Carli Suspension with 2.5" kings, 7100 stabilizer, 325/60R20 Duratrac's on 20x9's, AMP Steps, Bushwacker flares, H&S Black Maxx with EGR/DOC/DPF/Urea delete, aFe S2, 3 - 8" SS KC's, LCQ-1 with 2 kW of Hertz Audio HSK components, Smittybilt M1 bumpers, Warn Zeon 12 winch, Front E-Locker, OEM rad #2, OEM turbo #2
If it lost its nitrogen charge wouldn't the shock still function(in a diminished capacity) if it still had the hyd fluid inside? That's what I'm getting at. The nitrogen pressure is used primarily to reduce foaming in the Hyd fluid?
My 2010 KR 250 had the FX4 pkg and I traded it in with 13k miles,,,noticed the difference in ride immediately with the 2011. Then I saw the thread ref the issue with the stock Rancho Shocks several months ago. At that time I moved up to the Bilsteins,,,with just a few thousand miles on my new truck the Ranchos were at less than full capacity,,,
2013 F350 KR CC, Red/Adobe,6.7, 4x4,, Dynamat, King OEM Adjustable Shocks, Bak Flip G2, Epic door mod, B&W Turnover with Companion..
Got Bilstiens for the back at 1k miles. Rancho branded units didnt rebound (at 1K miles) Dont know if that really is a good test either, but I like the ride, no bounce, no bumping, going to put them on the front as now at 5K miles.
__________________ 2012 F350 Lariat CC 6.7L Autumn Red FX4
2007 Keystone Raptor TH
2007 F250 XLT 6.0L PSD, CC, FX4 - Traded
1995 F150 XLT 5.0L - Sold
I took my truck in for the NOX recall this week and while there I asked them to check the shocks because the ride has gotten progressivly bouncy. I have a fresh set of Rancho 9000XLs ready to put on but I am going to force them to relpace the FX4 OEM crap first under warranty and then immediately change them out myself. Yes, I know they are $5 shocks but at least the bolts won't be as rusted on...
I go to pick up the truck. "We looked at the shocks and they all still look fine". Next time they are going for a ride with me. I am a patient guy so I drove home this time...boing boing boing. Still not totally undriveable but getting worse every day.
__________________ 2011 F-250 CC 4x4, 6.7L PSD, LB, 3.55e, Tuxedo Black w/black leather, Lariat Ultimate, FX4, Camper package, Dual alt, Rapid heat, Tough Bed & mat. MODs: Epic Door Seal mod, Rancho 9000XL, AMP Power Steps, Lockpick, Roll-N-Lock "E" tonneau cover, T-REX black stainless mesh grilles, One off carbon fiber look center dash, M&R LED lightbar, Infinity Kappa x4 upgrade, Pyle Driver bed speakers, Plasmaglow FireStorm and FX-4000 strobes, Kensun HID fogs, ICELED scanner, 15w solar panel, Swing case, etc.
I changed out the front (to 5100's) at about 9000 miles but for whatever reason never got to the rears. Lately, (34,000 mi) it was like a pogo stick, so last week I put on a set of 5100's on and man, what a difference. Shouldn't shocks last 60,000 miles?
2011 F350 cc LWB 4WD 6.7L soon to be heavily modified
2006 Expy for the wife and kids
SOLD 2004 F350 172" wb srw Lariat 6.0l w/ 4" lift
SOLD 2008 F350 172" wb srw KR 5.4L
totalled 2006 F450 "steak" body
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.