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Sierra Dan

Factory "Rancho" Tenneco Shocks Love 'Em or Hate 'Em/Upgraded

Factory "Rancho" Tenneco Shocks Love 'Em or Hate 'Em/Upgraded  

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I have a 2015 Z71 with the OEM Rancho shocks still. Still have them not because I love them, but simply because I see no need to replace them, yet. The ride is great when I compare it to my 2005 Silverado with Z85 suspension and Bilstein 4600 Shocks. When I bought my truck I drove several other trucks including an LTZ (Not a Z71) which rode much smoother on road but had a lot worse rebound on bumps. I am trying to compare my experience between my '05 and my '15 but there are a large number of variables that color the results. Tires, truck length, weight, height. All these factors will affect "ride". I put that in quotes because I think there is a difference in terms being used here. To me "ride" means the overall feel of the on-road/off-road experience. "Control" is an entirely different thing. The video posted many pages back shows nothing but a lack of "control" on vehicle driven way to fast for the conditions.  You can not expect a truck with OEM suspension to handle conditions like that at those speeds nearly as well as a truck with a suspension designed for those conditions like a Trophy Truck for example. In my experience "ride" vs "control" is a compromise. You tend to give up control for "ride" and give up comfort for "control". There are some exceptions to this but those usually involve doing more than just a Strut/Shock replacement. Also "ride" is very subjective. Person A might find a soft cushy ride unacceptable while Person B is looking for that quality. The other thing to remember is ride is not solely affected by your shocks. Tires play a large part of it, but this is not about tires. 
I personally will be getting rid of the OEM Rancho shocks when they are at life's end. I will be replacing them with either Bilstein 5100's or Fox 2.0 IFP's. Reason 1 is cost. The OEM replacement Ranchos are very expensive for what they are, and 2 I am looking for better control.

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I was thinking some more about this on the way into work this morning (we were out of coffee and I had to do something to keep my mind busy for 40 minutes)......

 

The best explanation I could come up with between the two trucks I drove is that my personal truck ('15 SLT Z71) is very "nervous" over bumps, while the loaner truck ('18 LT Z71) was very "composed" over most bumps.

 

For example.....There is a left hand sweeping curve on the expressway in the morning. Large pothole on the left side of the lane right in the middle of the curve. It's got a "sharp" edge on it, is about the size of a frying pan, and is 1-layer of concrete deep. City has fixed it multiple times and it keeps coming back. My truck hits that and it hits hard. I can feel it in the seat, and steering wheel. The front and back end scoot over a shade, and the whole truck feels largely unsettled. The loaner truck would take that bump in stride. It wasn't as much of a "bang" as it was a "thud" in the feeling. It was general softer overall, and the truck remained mostly settled throughout the impact.

 

The constant "banging" and "nervousness" of my truck is what I'm looking to eliminate. I want a nice "composed" ride. I want it to take the hits, but continue on it's intended path, and reduce some of the impact into the cab. The plan is to find some softer sidewalled tires, and a new set of shocks and see where that gets me.

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43 minutes ago, 2kwik4u said:

I was thinking some more about this on the way into work this morning (we were out of coffee and I had to do something to keep my mind busy for 40 minutes)......

 

The best explanation I could come up with between the two trucks I drove is that my personal truck ('15 SLT Z71) is very "nervous" over bumps, while the loaner truck ('18 LT Z71) was very "composed" over most bumps.

 

For example.....There is a left hand sweeping curve on the expressway in the morning. Large pothole on the left side of the lane right in the middle of the curve. It's got a "sharp" edge on it, is about the size of a frying pan, and is 1-layer of concrete deep. City has fixed it multiple times and it keeps coming back. My truck hits that and it hits hard. I can feel it in the seat, and steering wheel. The front and back end scoot over a shade, and the whole truck feels largely unsettled. The loaner truck would take that bump in stride. It wasn't as much of a "bang" as it was a "thud" in the feeling. It was general softer overall, and the truck remained mostly settled throughout the impact.

 

The constant "banging" and "nervousness" of my truck is what I'm looking to eliminate. I want a nice "composed" ride. I want it to take the hits, but continue on it's intended path, and reduce some of the impact into the cab. The plan is to find some softer sidewalled tires, and a new set of shocks and see where that gets me.

You will have a planted, composed ride with Bilsteins or any other Monotube type shock.

Btw, Welcome to the site and Club 2kwik4u  :thumbs:

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13 minutes ago, Sierra Dan said:

You will have a planted, composed ride with Bilsteins or any other Monotube type shock.

Btw, Welcome to the site and Club 2kwik4u  :thumbs:

Thanks for the welcome, and the vote for some monotubes.

 

Been lurking for 18mo or so. Just recently started being more active here. 

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