Did you guys ever lose your shims under hard cornering?

[Roadrage David]

check this out!! needless to say i wil have them replaced with closed shims.

[silver69camaro]

Must be from component deflection or bolt stretch, but UCAs don't really see that much force. Are you sure the cross shaft bolt was tightened to spec?

[Chevy]

You're using a nylock nut, right?
Paul

[NOT A TA]

It's probably the nuts David. Happened to me once. I found out the torque nuts do not like to be used more than once. Also had a similar thing happen with nylock nuts on shocks, they're designed as a single use fastener.

[FirstGenZq8]

needless to say i wil have them replaced with closed shims.

gotta link?

[Roadrage David]

They are not nylon ., but tightend corecly and put on with locktite.
I must say that i have been driven ecsesif high speeds that go behond the normal tracks as it is on the remote publich highways and long cornering dike,s deselerating very hard on brakes and (auto)trany to a poind that sometimes my rear 315 wheels lock just befor the corners, befor i trow the car in.

left side is ok , but i seem to take left corners harder then right corners , so that might have something to do with it.
Firstgenzq8 those will be stainles steel home made ones, i gues everybody can make them , but i strongly advise people to use them when you go behond regular track driving, iven if you have the right bolds the forces on that frond end tire in the corner is tremendes.
Must say those 255 Nitto nt01 in the frond and there 315 nt555r in the rear is a absolute killer combo!! Grip wize!!.

Chek picture and look at my pasenger side wheel might be more going on !!.I have replaced the lost chims with ordenary cut o rings and limp back to the safe haven where we wil chek stuf out properly..

[Lowend]

I remember this happened to Mary Pozzi awhile back... She chalked it up to the chassis bracing putting extra stress/flex on the arm-towers.

I believe she addressed the problem with a tie-wrap around the shims

[6'9"Witha69]

If it was bolt stretch, you can upgrade from the 7/16" bolts to a 1/2" bolt. I had a buddy do it to his '70 Chevelle. That heavy boat would unload a rear stack of drivers side shims every 6 months or so it seemed. Not after we upgraded the bolts.

[mpozzi]

I remember this happened to Mary Pozzi awhile back... She chalked it up to the chassis bracing putting extra stress/flex on the arm-towers.

I believe she addressed the problem with a tie-wrap around the shims

Yep, there's about ten of those little suckers spread throughout the "bypass" at Thunderhill Raceway ...

Cheers,
Mary Pozzi

[David Pozzi]

Safety wire the shims in place if possible, use jam nuts over plain nuts if you have enough bolt length. Or check the nuts every track day before you go out. All it takes is for one shim to start shifting a little, once there is a little movement, the nut can back off and dump the shims on that end, when those are gone the A arm levers in and out and the other shims will soon depart.

[Kenova]

If it was bolt stretch, you can upgrade from the 7/16" bolts to a 1/2" bolt.

Could splined axle studs be used?

Ken

[79T/Aman]

it also looks as though there is no washers behind the nut, use all steel loking nuts.
Another thing to keep in mind is that with that many shims the center of the shaft is unsuported when heavy loads are placed on the ends the shaft can flex in the center this is why one piece shims are used on race cars.

[dipren443]

it also looks as though there is no washers behind the nut, use all steel loking nuts.
Another thing to keep in mind is that with that many shims the center of the shaft is unsuported when heavy loads are placed on the ends the shaft can flex in the center this is why one piece shims are used on race cars.

Yup, and remember those distorted thread steel locking nuts are ONE TIME use only. If you loosen, you must replace them.

[a67]

Could splined axle studs be used?

Ken

That is what I used to replace the stock bolts. Can't recall what size they are but I did have to cut the length down a little.

On this car the upper A arm has also been relocated (Guldstrand mod). I think (I should go look first) that I used some 1/4" thick steel squares that the studs where pressed into. Then tack welded to prevent turning or backing out.

The squares were size so that they would fit into place but not rotate. This is to aid in tightening the nuts onto the bolts.

a67