New TRD Pro with SAI out of Spec and Oscillation

[Lenster]

Hello folks,
I have a small oscillation coming from the right side (16 TRD Pro). It varies at different speeds. Dealer aligned although not sure they have the correct specs in the machine yet. They said it was due to the offroad tires (stock Nitto Grappler), I'm not buying it.

Two questions I have:
1-Should I be concerned with the SAI being out of spec (13.5 left, 13.3 Right) on a new vehicle with less than 700 miles!? Read online it seems to deal with steering wheel re-centering after a turn. What if anything should I do about it?

2-My guess is the oscillation is an unbalanced tire. How noisy are your Grapplers and do you feel/hear any oscillation?

Thanks!

 

[simonsay]

Zero oscillation on my 15. The steering wheel was off centered by about 5 degrees when I got it, but they straightened that up and I was on my way. The grapplers are not noisy at all...not even a little bit in my opinion.

 

[ST1FLER]

if the SAI is out of spec it could be a bent steering component, it wouldn't be due to Nitto Tires. I am run swampers with SAI in spec

 

[Bevo]

Mine is quiet with no vibration. An unbalanced or out of round tire would be my guess too.

 

[Lenster]

Thanks All! I will contact my dealer once more.

 

[philsey]

So, the dealer says it's the tires, eh? So, it's the stock tires, on a stock, new, 4R, right?

It's under warranty, right?

You need to man up and make them fix it, regardless of what it is. The implication that "it's the tires", would imply that every TRDP would have the problem, and that just ain't so.

Oh, and standby for them to blame you for going offroad, or hitting a curb.

 

[Antman]

if the SAI is out of spec it could be a bent steering component, it wouldn't be due to Nitto Tires. I am run swampers with SAI in spec

I don't believe you.

 

[Large Saints Fan]

That alignment sheet shows SR5. I beleive the Pro comes with a factory lift which will affect the front numbers. SAI and caster would be off in relation to an SR5 if i am reading that right.

 

[Jetboy]

I don't totally understand how you could have SAI out of spec but Camber in spec unless the spindle is out of tolerance. Or possibly the wheel bearing unit is out of spec.

 

[ST1FLER]

I don't believe you.

:lie:

 

[gm350reratliff]

Being that all other angles look good, and SAI just slightly out of spec, I don't think I would worry about it too much. Also, the TRDP is lifted a little in the front but still uses OEM UCA's, I say this because you see it on both sides. You may want to ask the shop when the last time the alignment rack was calibrated.

 

[neurospeed]

My 2016 had an oscillation issue also that occurred at about 60mph. Took it back to the dealer and they rebalanced my wheels and redid alignment. Still slightly pulls right though. They peeled off the previously placed weights and repositioned new ones. Now I have leftover sticky stuff left from the other wheel weights. Any ideas on what would take that stuff off?

 

[Lenster]

My 2016 had an oscillation issue also that occurred at about 60mph. Took it back to the dealer and they rebalanced my wheels and redid alignment. Still slightly pulls right though. They peeled off the previously placed weights and repositioned new ones. Now I have leftover sticky stuff left from the other wheel weights. Any ideas on what would take that stuff off?

If you have a TRDP, Do you happen to have a copy of your alignment sheet? Please upload so we can all see the specs.

 

[popey]

My 2016 had an oscillation issue also that occurred at about 60mph. Took it back to the dealer and they rebalanced my wheels and redid alignment. Still slightly pulls right though. They peeled off the previously placed weights and repositioned new ones. Now I have leftover sticky stuff left from the other wheel weights. Any ideas on what would take that stuff off?

Post the spec sheet!

 

[Lenster]

Dealer re-balanced front left tire, all good now! The oscillation is gone.

Tires are a little on the noisy side but I can get used to it. It is a mean machine after all!
I may look into some of the sound deadening mods in this forum.

 

[wfo9]

Ignore the SAI It is irreverent and non adjustable.

 

[BlackWorksInc]

So when you install the "TRD Suspension System" (the TRD Pro's set-up) according to the accessory sheet that comes with it, it calls for Caster at 3°30' ± 45' (3.5° ± .75°) and Camber at 0°0' ± 45' (0.00° ± 0.75°), though no SAI is specified.

The closest trim for those measurements in the FSM is the GRN285L-GKAGKA (4WD 5th Gen model code) in "X-Runner" Trim which is Caster 3°22' ± 45' (3.37° ± 0.75°) and Camber -0°6' ± 45' (-0.10° ± 0.75°), though a 4WD SR5 has 0.0° Camber specified...

Anyways, the FSM has two trim levels they fail to adequately explain; a "S-Runner" and "X-Runner" along side the SR5, Trail, and Trail w/ KDSS. Though it does not seem to specify a TRD PRO. Not to mention most of the specifications for the varying Trims are within 0° to 0°38' for Camber and 3°15' to 3°40' for Caster, with SAI varying from 12°15' to 12°44' between Trims. With such a minute amount of different I really wouldn't get bent out of shape on the SAI. Worst case it really is off by about .6° at it's most and at best the rack needs to be calibrated and/or the caster sweep wasn't done correctly.

 

[Lenster]

Thanks!

 

[neurospeed]

If you have a TRDP, Do you happen to have a copy of your alignment sheet? Please upload so we can all see the specs.

Sorry, I couldn't find the spec sheet. I have a '16 TRDPRO.

 

[Motonoia]

So when you install the "TRD Suspension System" (the TRD Pro's set-up) according to the accessory sheet that comes with it, it calls for Caster at 3°30' ± 45' (3.5° ± .75°) and Camber at 0°0' ± 45' (0.00° ± 0.75°), though no SAI is specified.

The closest trim for those measurements in the FSM is the GRN285L-GKAGKA (4WD 5th Gen model code) in "X-Runner" Trim which is Caster 3°22' ± 45' (3.37° ± 0.75°) and Camber -0°6' ± 45' (-0.10° ± 0.75°), though a 4WD SR5 has 0.0° Camber specified...

Anyways, the FSM has two trim levels they fail to adequately explain; a "S-Runner" and "X-Runner" along side the SR5, Trail, and Trail w/ KDSS. Though it does not seem to specify a TRD PRO. Not to mention most of the specifications for the varying Trims are within 0° to 0°38' for Camber and 3°15' to 3°40' for Caster, with SAI varying from 12°15' to 12°44' between Trims. With such a minute amount of different I really wouldn't get bent out of shape on the SAI. Worst case it really is off by about .6° at it's most and at best the rack needs to be calibrated and/or the caster sweep wasn't done correctly.

I recently purchased a new 2023 4Runner TRD Pro and when I drove home from the dealership, there was a slight pull to the right that I compensated for by holding the steering wheel slightly to the left. I took it in to my local dealer to have an alignment done, they saw the right toe was out of spec and corrected it. I now have very little drift and life is good. But I did notice that the left front SAI was out of spec before and after the alignment was done at the dealer. I don't know if the alignment spec accounted for the TRD Pro having the Fox suspension. The tech chose the option for "Toyota 2016-23 4Runner 4X4 Trail/TRD". Is it okay that my SAI is just out of spec on a brand new TRD Pro? Everything I read online about SAI has to do with possibly bent suspension parts/pieces. The dealership told me there is nothing they can do on their end regarding the SAI being out spec and that its normal.

Front Left
Camber (Spec -0.6 to 0.5), before 0.2, after 0.2
Caster (Spec 2.8 to 3.8), before 3.1, after 3.1
Toe (Spec 0.01 to 0.16), before 0.06, after 0.03
SAI (Spec 11.7 to 12.7), before 11.5*, after 11.5*

Front Right
Camber (Spec -0.6 to 0.5), before 0.0, after 0.0
Caster (Spec 2.8 to 3.8), before 3.0, after 3.0
Toe (Spec 0.01 to 0.16), before 0.20*, after 0.04
SAI (Spec 11.7 to 12.7), before 12.4, after 12.4

Let me know if more info is needed from the alignment report. I could not get it to upload as a picture.