Mystery of the rear flex clunk; chapter 2

[fourfive]

Some people have suggested that maybe the shocks are too long for the springs, but at the same time some other people said that was nonsense... For reference, I have tundra 5100s with ome 906's.

What's the part number for your Tundra rear 5100s? Just to verify the compressed & extended lengths are appropriate for the 906's. It's been a while but if I remember correctly, for the 906, the compressed & extended shock length should be around 13.8" & 22.4". If the shocks are longer then that I think the springs can potentially get unseated.

 

[brillo_76]

Wow I've never seen that. I don't believe that I have that anymore as I am running rokman lower arms

Yes some of the earlier had these. Sorry I just figured folks wanted to know what this piece of metal was on some of the earlier 3rd Gen runners.

Great to see you are getting some solutions to your issues.

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[jross20]

What's the part number for your Tundra rear 5100s? Just to verify the compressed & extended lengths are appropriate for the 906's. It's been a while but if I remember correctly, for the 906, the compressed & extended shock length should be around 13.8" & 22.4". If the shocks are longer then that I think the springs can potentially get unseated.

Honestly, I could have sworn they were tundra 5100s but wheelers site just says 4R 5100s 1.5-3" lift. Sku BIL-4R5100-X2
Maybe I messed up?

Specs:
Collapsed Length (IN): 13.84
Extended Length (IN): 22.4

But the 22.4 matches what you said..

Ahh

:zoom:

 

[Bad Luck]

Honestly, I could have sworn they were tundra 5100s but wheelers site just says 4R 5100s 1.5-3" lift. Sku BIL-4R5100-X2
Maybe I messed up?

Specs:
Collapsed Length (IN): 13.84
Extended Length (IN): 22.4

But the 22.4 matches what you said..

Ahh

:zoom:

Those are Tundra shocks that have had the lower bushing already switched for 4Runner use.

 

[fourfive]

Honestly, I could have sworn they were tundra 5100s but wheelers site just says 4R 5100s 1.5-3" lift. Sku BIL-4R5100-X2
Maybe I messed up?

Specs:
Collapsed Length (IN): 13.84
Extended Length (IN): 22.4

But the 22.4 matches what you said..

If the rear clunk is confirmed to be coming from the 906 getting unseated, I'm wondering if your current bilsteins are still too long even though it is listed as being compatible with 1.5-3" rear lift & maybe the bilstein BIL-24-249966 for 0-2" rear lift might be a better fit? Have you tried lifting the rear frame on jack stands and letting the axle droop all the way to see if there's any play in the coils? Could also jack one side of the axle to see how secure the coil is on the opposite side.

 

[jross20]

Those are Tundra shocks that have had the lower bushing already switched for 4Runner use.

If the rear clunk is confirmed to be coming from the 906 getting unseated, I'm wondering if your current bilsteins are still too long even though it is listed as being compatible with 1.5-3" rear lift & maybe the bilstein BIL-24-249966 for 0-2" rear lift might be a better fit? Have you tried lifting the rear frame on jack stands and letting the axle droop all the way to see if there's any play in the coils? Could also jack one side of the axle to see how secure the coil is on the opposite side.

Oh that is a good idea. I will need to get a taller jack to do that. Can I lift her by the tow hitch?

 

[fourfive]

Oh that is a good idea. I will need to get a taller jack to do that. Can I lift her by the tow hitch?

Would probably be best to lift from the rear diff then set your jack stands under the frame. You can lift from the tow hitch but if you meant lifting from there to let your axle droop without jack stands, I wouldn't do that. Relying on a jack alone without jack stands could turn into a very bad day.

 

[jross20]

Would probably be best to lift from the rear diff then set your jack stands under the frame. You can lift from the tow hitch but if you meant lifting from there to let your axle droop without jack stands, I wouldn't do that. Relying on a jack alone without jack stands could turn into a very bad day.

Oh no I don't rely purely on a jack, haha. But that's a good idea to lift from the diff. (That rhymes)

My new mega jack stands come in today so I should be all set!

 

[brillo_76]

When I lift my runners I put jack stands either under the frame or under the rear diff axle housing. I use 6 Ton jack stands so I get more height. Granted these are the ones with the repaired frames. On a bad frame I use the front and rear diffs until I get those sections rebuilt for extra strength.

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[jross20]

They are here!

 

[jross20]

Mystery solved, at least I'm pretty sure. The 906's are entirely too short!!

Looks like I'm going to get 890s. They are a good bit longer right?

 

[brillo_76]

Mystery solved, at least I'm pretty sure. The 906's are entirely too short!!

Looks like I'm going to get 890s. They are a good bit longer right?

Looks like Deves2 was right. You definitely found your noise. Either longer coils or shorter shocks. The Mystery is solved.



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