Ubolts under torqued

Well considering that Toyota is still using crappy springs it'd prolly be a safe bet that the same limp wristed torquers are on the assembly line...

 

If you're in doubt I don't know why you wouldn't take the 10 mins to check them and be safe.

 

I don't have a torque wrench so I used a wrench. Mine were not very tight. I could get a half turn before they were really tight. I gave them a good tight snug. I'm assuming mine were at 37 ft-lb since I was able to get 1/2 turn out of the bolts before it was tight.

 

Just wanted to add my experience. In stock form on my 2012, I had a small vibe in the 40-60 area. Then I threw on a 2.5" leveling kit up front to clear my 285's. The vibe increased. I purchased a tapered 1" block for the rear and at the same time saw this thread. So sure enough, when I went to take my u-bolts off, they were loose. So I throw in the lift block and tightened them sob's down to 85#. Go for a test ride and it is smooth as silk all the way up to 80 mph.

So from my experience, tightening the u-bolts to 85# removed my driveline vibe. Even on a lifted truck (which is said to increase vibes).

I voted "Tight as they should be" but I misread the poll. I should have voted "loose". Mine were indeed too loose.

Thanks for the head's up OP.

 

I still stand on my position , no way do I buy the 37ftlb. torque thing being right, Toyota still uses crap for springs...

For reference: 1st gen Tacomas are spec'd for 90 ftlbs. on Ubolts...
2nd gens are spec'd for 37 ftlbs.

Why the huge diff. in numbers ? Rationalize this to me & maybe I'll at least listen to Toyota's explanation...

 

It's strange that Toyota specs 37 lb ft for this part. And when I checked mine a couple of months ago, sure enough, they were not very tight. The spec seems unreasonable to me, so I tightened them up.

 

It wouldn't be the first time Toyota did this. Look up the head gasket problems on the 3rd gen Supra because of under torqued bolts.

I found mine were extremely loose as well. I tightened them up to 90 ft-lbs.

Thanks OP.

 

4WD,
I put some Dakars on and was rechecking torque tonight after about 60 miles.
I followed the FSM but used 85 ft/lbs on the u-bolts. FSM says, torque in the air, which I did.
Checking tonight, with vehicle on the ground, u-bolts were "loose". Took them back up to 85 ft/lbs.
What gives?
Imagine this procedure being followed with 37 ft/lbs...

 

All suspension components should be re-checked after 200 miles or so. I also, personally, tighten once on the ground.

 

Why in hell would they say this is beyond me & wonder what they meant by "in the air".. I tighten Ubolts in "real world" situation, on ground with all vehicle weight on axle...

I think its time to shitcan the FSM if these are the best recommendations they can come up with

 

I torqued mine to 75 Ft-lbs with Toytec AAL's installed, is that tight enough, what does everyone think about this setting?

 

It makes you 38ftlbs smarter than anyone who thinks 37 ftlbs is enough....


You'll be fine with that...

 

Damn, that works for me !...

 

Finally got around to checkin' my U-Bolts, only to find the poll closed

2010 A/C V6 Auto 4x4 23,000mi 3yrs+

Broke nuts free w/2' Breaker Bar so I wouldn't be torquing a seizure.
Broke loose 'bout 1/8 of a turn.
All 8 immediately "clicked" upon tightening w/torque wrench set @ 73 ft/lb
My vote: "Tight as they should be"


CC

 

Did this remove your driveline vibrations at all?

 

Most of my U-bolt nuts were finger tight @10K a year after I bought the truck new...

 

Didn't really have much vibration, nor did I change anything.
Suspension is stock.
My U-Bolts were tight.


CC

 

Wow, they were huh? Shit you'd be the first one then..

I wouldn't put any faith in that poll, half the guys that said they were tight as should be , I know for a fact some of them had their suspension done before hand... But all I want is for everyones to be tight, so good job...

 

I was there when Dougy proved it to me. Was replacing the leafs on a guy with stock leafs, untouched...they weren't hand tight, but damn close...put a short socket wrench on one and a quick effortless tug had the nut spinning right off.

Needless to say I went and double checked all my fittings lol

 

I know it sounds anal but I re-torque all my suspension shit every time I change my oil. Including the drive shaft. Its a good practice and only takes 5 minutes. You can generally find a 20-150ft lb click type half inch drive from sears on sale for $40 every couple months.