Tundra rear shocks or "superflexy" set up
 

Hey Guys,

Went down the rabbit whole today on trying to figure out how to get more travel out of the rear of our trucks without going with a full long travel kit. I think I have found that you can just run Tundra rear shocks as replacements. Wondering if anyone has first hand experience doing so.

Along my studies I also ran into the FJ guys doing what they call "superflexy" set ups. They are not using direct Tundra shocks but different shocks that extend the overall length and travel of the shock in the rear. The Tundra shock is not as long as what they are doing so I am thinking it may work fairly easily.

Here's a link to the "Superflexy" thread:
superflexy on the cheap, or more expensive if you're into that :bigthumb: | Toyota FJ Cruiser Forum

My idea here is using a 11 inch or sub 11 inch travel shock. I'm Currently running Icon 2.0's w/ icon 2" spring so I was looking at the Tundra 2.0 Icon Shock or they also make a universal 11 inch shock that could be a viable option as well. Trying to figure out if I would need to switch my icon spring for the toytec one. Gears are turning any experience or advice is much appreciated

Cheers!

Good question. I assume the intent is to have better traction and stability on higher-rated, slow-going CO mountain trails?

Looks like an involved process. The Icon 2.0 has just under 9" of exposed shaft and is good up to 3" lift with overall length, hand measured, 24" and per published numbers, 24.5". Other shocks good to 3" have the same extended length around 24-24.5.

So you want 2" extra. But that means how much rear lift? 4" rear lift? What would be the minimum spring that can use +2" shock travel? I don't know. But any difficulties reworking the rear suspension for a 4-5" lift aside, what front lift are you going to have to match a 4-5" rear lift?

Even at 3" of total lift front and back you are robbing your front suspension from travel in order to give your rear suspension more travel. Yet our trucks flex better in the rear anyway.

Wouldn't the end result be a truck more capable to climb big rocks and ledges but not more capable (in fact, less capable) of coming back down said rocks and ledges? Would that not cause issues, like, in rolling it on an offcamber spot that was ok going up but is not ok coming down?

Just thinking aloud.

So the idea here is not actually adding lift to the truck but having a shock that has more travel which in turn will allow for more droop. The weight of the truck will have the shock sitting further into its travel but when going through rocky terrain will allow for that shock to extend to a longer length thus giving me more droop. If I need to change the spring it would be to a Toytec Superflex spring which last time I checked (and its been years since i've looked into that spring) is still good for roughly 2 inches of travel.

If you look into the FJ thread I am looking at doing his "on the cheap" set up minus using the Procomp shocks that he does.

Basically needing a spring that can support having a 10.5-11 inch travel shock. While not adding additional lift to it.

Thanks for the input I too am just thinking out loud

Yeah, it is fun to discuss this.

Assuming there is a spring that can do something along those lines, I guess the other question would be about the shock body vs the shock shaft.

The Dobinsons long travel allows for 3.5" in the rear GS 59-575, IMS 59-50575, and MRA A575.

So all these are 28.75" extended and 16.73 collapsed.

That sounds like what you want. May be PM Mike to see what springs work with those?

Ahhhh man but that’s too easy!

If you want to go super flexy you'll have to remove the rear sway bar, then you will have to install extended brake lines. Then, if you want to sustain highway handling you will need the HD springs or airbags to compensate for removing the rear swaybar. When you lift you will need the taller 9" airbags if you go that route. It's a good setup but you have to do it right.