Old Buzzard

[QUOTE=BCraven1018;5406838]Here.
My 14' LTZ shakes at 75, and has a whine between 42-60. Dlr has "rebuilt" the diff 2 times. He's now telling me that GM has a TSB out, that states if the noise is noticeable only in a 5-7 mph range, they won't do anything about it.
I've had 2 sets of tires on it, balanced, rotated, aligned. Most reduction was w/ the new tires. [20" OEM wheels.]

It got a wash/cleanup last nite. The pics will be in local ads, on Monday.

This is THE LAST piece of new GM , that'll ever sit in my garage.
The problem is, the Dodges, Fords are no better... Some worse.
A Tundra seems to be an expensive, poor mileage, alternative. I won't drive an import, tho.
Back to an older truck, that I can mod, lower, do whatever, and not be concerned w/ warranty. [Or, lack of.] My 08 ext cab was a sweetheart. But, NO, I HAD to have a new one, like my bud has...Big mistake.

Back under my rock

FELONIOUS1

I didn't have any shake with my stock LTZ 20s except the driveshaft at around 95+ mph. Now that I have put the Intro 24s on I feel the same thing you guys are talking about. At first it was really bad but Discount Tire left those little round metal rotor retainer clips on (stock wheels have a recess for them but my billets don't) and they only static balanced my tires. After removing the clips and rebalancing my tires it's mostly gone but still there just enough to irritate me. From about 60-75 mph.

Boost-freak

your truck don't have it yet , you will know for sure when it does

until a fix is proven to fix it for good i will not throw any money at it

Ryan Mills

Alright dudes, my 2016 RCSB HAD this from 68~75mph where it would shake my center console armrest enough where I couldn't have an open can of... soda in it, without it sloshing out. My truck is lowered 6" in the rear, 3.5" in the front. 22" wheels as well. I noticed my front U-joint was pretty darn tight against the bellow/shaft seal thingy after lowering, so

I had my driveshaft shortened 1 1/4" and dynamically balanced today, and it's now FIXED. FIXED!!!!!!!

Old Buzzard

I have had ZERO bites on my '14LTZ..even at the low end of private sale average $.
Have had several "helper dudes" called to "help me sell it"...Screw them. Some want $300+.
I have done some checking on the diff noise. The dana Corp says 75-90 lube.
Screw it, I'm changing to 80/140, and checking the back lash, while I'm in there.
The ******* at the dlr said that if the b/l is any where between .002 and .010, it's good to go...

My bud has a '15, w/ 3.73 gears... NO noise. He suggested we change it, add a nice exhaust, and drive it...May be forced to do that.

I may lower mine about the same. Thanks for the h/u on the d/s length.

Ryan Mills

If I were to do it again, I'd say 7/8" to 1" would probably be ideal with the 6" drop.

JRoyPDX

Mine had a shake from 70-75mph before and after I lowered it. I had my driveline balanced early this week and so far the vibration is gone. I haven't driven it a ton yet, and they said the driveline was ok, but they still "moved the weights around a little" and it seems to have made all the difference. $70 fix.

ZO6Ted

By driveline, the driveshaft and is it a single? Did you remove it and take it in? Details please sir. Only thing I dont like about this truck...

JRoyPDX

Sorry, yes...I have a rcsb with a steel 1 piece driveline. I was headed out for a 1 week vacation so before I left I removed it myself and dropped it off at Driveline Express here in Portland and had them check it for true (it was true) and make sure it was balanced, etc. They said it was pretty much fine, but they did make some slight weight adjustments on the balance. They did use a round weight, while gm's were rectangular.

ZO6Ted

Thanks I guess I'll do the same soon as it cools off a bit more. Sure would be nice! Hope its not my axles Ive heard that too.