1st AUTO-X of season DNF - HELP

[BEAR-AvHistory]

Had to withdraw with a very very heavy rubbing sound on hard right turns. I have manual steering & could feel whatever it was through the steering wheel.

Differences from last year Anti-Moan brackets on rear axle, HTS+ pads all round, NITTO 555R 245X45X17" F (factory spec @ 44pai 25.94tall X 10.08 wide vs NITTO 555 255X40X17 25.08 tall 10.16 wide . Car raised to 4" from 3-5/8th to clear speed bumps in DD driving.

The mystery. I can't find any signs of a rub on the tires or body or wheel wells. Car was OK in normal DD driving for the past few months.

Really at a loss as how to diagnose the problem.

[Mark Dougherty]

Kevin
Just sent you a pm
Let's figure this out

[BEAR-AvHistory]

Got it

[rich grsc]

Had to withdraw with a very very heavy rubbing sound on hard right turns. I have manual steering & could feel whatever it was through the steering wheel.

Differences from last year Anti-Moan brackets on rear axle, HTS+ pads all round, NITTO 555R 245X45X17" F (factory spec @ 44pai 25.94tall X 10.08 wide vs NITTO 555 255X40X17 25.08 tall 10.16 wide . Car raised to 4" from 3-5/8th to clear speed bumps in DD driving.

The mystery. I can't find any signs of a rub on the tires or body or wheel wells. Car was OK in normal DD driving for the past few months.

Really at a loss as how to diagnose the problem.

What is 44pai? Thats not psi is it?

[ProJoe]

disconnect the shock from the control arm (may have to remove the shock/spring from the car completely). this will allow the control arms to move through their range of motion without resistance from the spring/shock. from there move it up and down while checking clearance at different steering angles. this should help point you in the right direction in diagnosing the rub

[CraigS]

For me it's easier to disconnect the shock at the top mount. As you move the suspension up, you need to guide it some as it has a tendency to get snagged under the frame mounting ears.

[Jeff Kleiner]

Were the returns on the front wheel openings trimmed? Look for evidence of tire rub at the front of the openings. Your 245/45s are almost .7" larger diameter than your previous 255/40s.

Jeff

[BEAR-AvHistory]

44psi

No sign of rubbing tire, body shell or sheetmetal

Additional: been driving the car for 2 years including AUTO-X. This occurred only after I added the pads, front tires & moan brackets.

Factory spec is what NITTO inflates them too to get the physical measurements. They also use a specific wheel width to do it.

[rich grsc]

44psi

No sign of rubbing tire, body shell or sheetmetal

Additional: been driving the car for 2 years including AUTO-X. This occurred only after I added the pads, front tires & moan brackets.

HOLY COW!!!! Try getting your tire pressure correct first, 22-23 psi.
10# per thousand weight.

[BEAR-AvHistory]

HOLY COW!!!! Try getting your tire pressure correct first, 22-23 psi.
10# per thousand weight.

What is wrong with the pressure? Car weighs 2250 I have 22/23.5 in mine.

Shoe polish check indicates flat tire patch & no roll under of the sidewalls. Factory spec 44PSI is what NITTO inflates them too to get the physical measurements. They also use a specific wheel width to do it. 8.0" & 11" The tires will fit a wider range of wheels but that's what they measure with.

[rich grsc]

Your first post lists 44pai, which you said was psi. Logical to think you meant that was your tire pressure.

[carlewms]

Ok here some ideas from a newbie ... but I have slept in a Holiday Inn Express once ...

While the noise could be loud or even amplified, the source "rubbing parts" might be pretty small and harder to see or even show up on the rubber or metal of the wheel assembly. What I am saying is that just because there is no visual evidence of rubbing it does not mean it is not happening.


I assume that the suspension has been checked to make sure all the bolts, etc. are tight.

1. Since it only occurs on a hard right turn ... is it some interference between the brake hydraulic line and the wheel or tire?

2. Although unlikely could it be interference between the wheel and the brake caliper? I don't have this on my front brakes but had a very very slight touch on the rear ones. Under the heavier loads of AC perhaps the two are touching momentarily.

2. Perhaps the tire is rolling more on the rim during AC and therefore the sidewall is flexing toward the inside of the tire in a hard right turn hitting something on the suspension, brake caliper assembly, brake lines or f-panel.

3. Check to see if there is any physical difference between the right and left side of the suspension, etc.

4. Are you using steering rack limiters and could have one of those failed? I recall reading where some older racks were setup with PVC limiters and these would fail over time.

Just some more ideas that you may have not considered and I hope I am not being to presumptuous as a newbie.

[BEAR-AvHistory]

Don't see any contact with the brake line but am marking the tires to check that out

Tire stripes don't indicate any roll under of the tread.

Tried putting in limiters but they were not a fix, just lost some turning circle.

BTW my login has crashed on the other site so I can respond to the thread over there.

Jeff,

Can see any body contact marks on he tires or body. Noise has a heaver feel/sound? Then a body rub. Seem to be able to feel it in my hands through the manual steering (could be my imagination searching for a solution.

[BEAR-AvHistory]

Have a charity car show on Saturday. Will try a local parking lot early Sunday morning to see if I can get more input. Still no response about login from the other forum.