I also would get them for both front and rear. I just did and like the difference. Don't forget the $100 debit card rebate that you can get from Rancho with purchase of 4 RS9000XL shocks. Valid 3/1 to 6/30.
oh wow thanks for posting that ...I just bought four. Ill have to send in for the rebate. Oh and I love the shocks.
One thing on Rancho 9000 shocks: If you keep your receipt, you have an unlimited lifetime warranty; just send them back to Rancho and they will send you new replacements. Loose your receipt and you have 4 more items to through into the trash.
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1996 Lance 500 and 2006 F-350 PSD 4X4 DRW Our Truck Camper Photos
While it may be true that there is very little additional static load on the front axle with a camper in the box, only 100 lbs. with my 3300# camper, there is a dynamic loading from driving over irregular surfaces, bridge approaches, and when braking that shifts the weight of the camper to the front axle and to its springs and its shocks. Shock are designed for dampening dynamic changes in loading on the spring after all.
I have only had good life with the OEM shocks on my Toyota 4WD trucks. With all the GM trucks and SUV's I have never gotten even 30K miles without any serious load hauling. But that said, the shocks on the new 2011-2012 GM trucks are definitely adequate when new and control my camper without any problems at all. That may not be the case after 10K miles but I would not assume that new OEM shocks for a heavy duty truck need immediate replacement when adding any camper.