rear springs fall out when flexing

[deves2]

3rd gen with tundra front springs and Bil 5100 shocks rear is OME 906 springs and tundra 5100.
the runner works very well off road but the rear springs get so loose when flexing they bang against the frame. When wheeling there is a very loud clunk and the spring will fall back in to the top "seat". It has done this ever since I added the small lift. Is this normal????? it does it with the swaybar installed or removed. Does anyone else have this problem? What can I do to make sure the springs dont come all the way out? My first thought was a limit strap but in limiting the flex will I loose some of the offroad performance?
Any ideas???
thks
Dave

 

[turbo8]

You will need to retain the springs in there spring seats.

There are threaded holes near the upper mounts that you can bolt some sort of j-hook to hold the springs in.

For the lower mounts, there are some slots below the spring seats, I used some hose clamps to snake through the slots and clamp down the springs to the seats.

Check your rear brake line and make sure you're not stretching it at full droop.

Hope this helps.

 

[JRZEE2000TR4LTD]

This should not happen with your setup. Do you have the sway bar installed? What part# rear shocks do you have?

 

[Black798]

3rd gen with tundra front springs and Bil 5100 shocks rear is OME 906 springs and tundra 5100.
the runner works very well off road but the rear springs get so loose when flexing they bang against the frame. When wheeling there is a very loud clunk and the spring will fall back in to the top "seat". It has done this ever since I added the small lift. Is this normal????? Does anyone else have this problem? What can I do to make sure the springs dont come all the way out? My first thought was a limit strap but in limiting the flex will I loose some of the offroad performacne?
Any ideas???
thks
Dave

Same thing happened with mine when I installed 906 coils. Those Bilstein shocks are 2 inches longer extended than the stock ones but the 906 coils have the same free height as the stock coils so the axle will always droop out too far. I did a couple things to stop this. First I wrapped some wire around the top coil wrap and tied it to the frame so it allows the coil to not touch the frame but stay indexed correctly so it reseats properly when weight comes back down. I also added a 10mm trim packer to each side which added onto the stock internal coil bumpstops was enough to keep tension on the springs almost all the time. You may also want to check to see if your bumpstops need to be extended. I believe those bilsteins have the same length specs as my ranchos and without extending the bumpstops my shock was the limiting factor for uptravel which over time will blow out your shock.

 

[deves2]

jrzee2004tr4ltd springs are Old Man Emu 906 (no heavy bumpers on my rig).
The springs come loose with or without the swaybar.

turbo8 i just ordered extended brake lines from wheelers today

Black798 I will extend bump stops later this week

 

[JayRolla]

Like stated above the shocks are too long. The best option would be getting some 4runner billys. That should stop them from popping out. Lowering you bump stops will cause you to lose up travel and may bottom out.

 

[phattyduck]

Like stated above the shocks are too long. The best option would be getting some 4runner billys. That should stop them from popping out. Lowering you bump stops will cause you to lose up travel and may bottom out.

Bingo. Shorter shocks or longer springs are the answer. 906's are 'small' lift springs, the Tundra 5100's are 'large' lift shocks.

-Charlie

 

[Black798]

Like stated above the shocks are too long. The best option would be getting some 4runner billys. That should stop them from popping out. Lowering you bump stops will cause you to lose up travel and may bottom out.

The bottoming is an issue I have experienced only a few times but it is possible with your bump stops being extended to accommodate the shocks. Ive only experienced it when there was about 300 lbs of gear in the back and going over some big dips in the highway at 75. I choose to make the sacrifice though because my up travel lost, which wasn't much, was more than compensated by the gain in down travel from the longer shocks and I am planning on going to OME 890s or 891s and some nicer icon shocks later this year to fix the bottoming and handle my added bumper weight

 

[deves2]

thanks for all the responses guys!!! now I have to figure out what I want to do to correct the problem. Tonight I also noticed that sitting static, nothing in the back of runner. no spare tire, and a stock factory bumper the top 4 coils are touching each other (coil bind). I called the dealer where I purchased and they said that was very normal. I'm new to 4runners and there is no one in the area to compare to.
tks again