Alignment question after lift.

I just installed 5100 with 884 springs and 5100 on the rear with my existing Firestone air bags on my 2013 TRD Sport 4x4 double cab with stock tires. I had the alignment done today with these results. Do these numbers look normal? My concern is I have a slight road noise. The best way to describe it is like a hum from a tire. Not sure if it is tire noise or driveline noise.
Thanks for all your help in advance.

 

Caster looks a bit low to me. Did you ask for specific numbers? I would think that with your lift you'd want at least 2 - 2.5 degrees of positive caster. Does it wander or is it twitchy at all?

Mine developed the front diff groan immediately after lifting. Gonna get the new Toyota bearing since I'm still under warranty. Search it here - there's 175+ pages of detail on it. Not sure that your alignment numbers would cause road noise. Can you tell at all where the noise is coming from? Front? Rear?

 

No I didn't ask for specific numbers. Sounds and feels like its in the front. For the little I drove it seems drive OK.
I'll have to drive it on the highway and see how it handles.

 

If you're OK with how it drives you'd probably be OK with leaving it but if you take it back I'd ask for 2.5 caster, 0 camber, 0 toe. Problem is with stock UCA's (assuming yours are stock) if you go too high on caster you'll have a negative effect on camber which will wear out your tires on the outer shoulders. I told my guy to get the caster as high as he could without positive camber - I got 2.5 (give or take a few tenths left/right) with only .5 positive camber and it drives good. I'll be adding adjustable UCA's as soon as I can build up my mod fund again.......

If your hum is cyclical in nature and coming from the front it may very well be the front diff bearing - go here for some "light" reading on the subject......https://www.tacomaworld.com/threads...differential-bearing-vibration-thread.152173/ It may help you with determining the source of your noise.

Like I said, mine started almost immediately after installing billys and OME 885 coils with around 2.5 inches of lift. Good luck!

 

Only issue I see is the camber. That should be zero, but may cost you some caster to get there.

The half degree camber will change the wear pattern on your tires, probably what you are hearing.

 

Really? Half degree would create noise and uneven wear? I'm surprised by that - don't want to give OP wrong information, just speaking from my personal experience.

 

How many miles do the tires have on them and was the truck in line before the lift? It's amazing how fast tires wear in to the specs. Then, when you change them, they need to wear in again. If it's minor, I'd leave it and let everything adjust. I'm guessing that unless you have new tires already, that new tires would solve that problem.

 

They are stock tires with 31,000 miles. Not sure how the alignment was before the lift, but tires were wearing even.

 

That's an OK alignment.

Folks with lifted Tacomas typically trade off some camber to get more caster. Your camber is fine for tire wear as it is. But the truck would drive a little more stable if you got the camber numbers closer to zero so as to increase caster.

Still, that's not a bad alignment, and if you take it back and ask them to change it according to preferences you didn't tell them the first time around, expect them to charge you to do it again.

As far as the HUMMMM - you've probably got both tire noise and driveline noise. It takes some discerning to learn to tell the difference. Driveline noise is a deep hum that you feel. Imagine the reverberations after the initial strike from Kettle Drums. Typically louder when you're hard on the gas, but not necessarily. (And regular cabs are famous for making a driveline whirring/grinding when you're completely OFF the gas at highway speed - but that's a regular cab thing.)

Tire noise is more of a whirring-sailing noise. Probably a little louder if there's a little water on the road. The noise you hear when you're passing a semi truck trailer on the road, when you're alongside of the trailer, and the truck tires are both in front of and behind you, but you're not next to the cab yet really getting blasted by the engine noise.

 

Yeah, it's amazing how subtle the "set" on tires can be. Still snce it was wearing evenly before, just tough it out for a few 1000 miles and it will probably adjust to the new alignment. The new alignment looks to be within specs so it's not alignment, IMHO. If the tire whine bothers you, it will be a good excuse to ditch the stock rubber nd put on something more interesting!

 

Half a degree will create some noise, especially on the ride home. If that's the cause it should be gone in a few days.

ETA: that half degree, for his truck and his tires, might also just be a resonant spot that makes noise...

 

When driving when everything is cold the noise goes away when I put it in 4 wheel drive, take it out of 4 wheel drive, noise comes back. Now the interesting part, it seems like when things warm up the noise is less noticeable.

 

Needle bearings?

 

See my post above re: front differential bearing. Post #4. If it goes away in 4WD that's probably it.

 

Will a diff drop help?

 

Nope. This is my understanding of the issue. The driver side cv shaft has a shitty needle bearing where it connects to the front differential. When you lift the truck the shaft puts more stress on an already shitty part and makes the groaning more pronounced. There is a TSB for it that's in the thread I referenced so if yer under warranty Toyota will replace it with a new, updated needle bearing. When you put it in 4wd the differential spins the shaft and takes the stress off the shitty bearing-and the noise goes away. Take it out of 4wd and the shaft spins freely and puts the stress back on the bearing.

diff drop is something else and won't help. Seriously, read the thread I linked..... The collective has shown me the light.........

 

Even with the lift will Toyota honor the warranty?

 

They issued a TSB so the shitty bearing is a known issue - they have to prove your lift caused the problem. The fact that there's a TSB is admitting the part is suspect. Some have gotten pushback from the dealer on warranty. I haven't taken mine in yet so I won't know until I do. Your experience will depend on your dealer - some replace no questions asked. The actual TSB is in the thread. I'm taking it to my dealer when I go.

Read the thread...... Folks report dealer warranty experiences. There's also an aftermarket fix that replaces the bearing with a bushing. I'm going the warranty route since mines a 15.

 

So if I use 5100 set at 0 and go back to my stock coils, the noise should go away?

 

Not necessarily... Some, but not all experience stock with no lift. It's a shitty part and lifting it makes it more apparent. It could also go away completely. Every truck is different.