Shudder on take off from a standing start.

Anybody experience a shudder in their truck during a takeoff from a standing stop. I have had everything inspected and lubed but it still happens whether starting in a straight line or turning a corner. Once I' abot 15 mph it goes away. I have had the drive shaft rebuilt with all new u-joints and a carrier bearing but still have the same issue.
it is a 2002 Tundra Limited with 182k miles on the clock.
Thanks,
Pete

 

Transmission fluid is properly checked and is clean and full?

 

Are you confident they used the correct carrier bearing? Did they actually balance the drives shaft?

 

Trans fluid is clean and was changed about 5k miles ago. Level is where it should be.

All the u-joints were replaced and the driveshaft was rebalanced. As far as the carrier bearing being the right one , how would I know? All the work was done at a driveline speciality shop that has been around for many years.

LSD Fluid was changed at the same time the driveshaft was rebuilt. The shudder was there originally and that is why I took it to the driveline shop.

Can't seem to figure out what is going on.

 

Might be axle wrap. Do you have lift blocks/towing. I had that with my Tacoma.

 

Vehicle is stock factory height. The only thing that was added right after it was purchased new by the original owner is a rear sway bar and all the bushings on the sway bar and the end links were replaced by me 4 months ago. I had the truck on a lift today and checked everything underneath and can't find movement or loose fitting anywhere.

 

2wd? 4wd? V6? V8? The more info you share, the more we can help.

 

If it’s diff chatter from wrong fluid in the LSD, @healeyman should also feel similar chatter when backing out of the garage/driveway/parking spots while turning too. If he doesn’t feel it in reverse while turning hard at very slow speeds it’s 100% not diff chatter. Easy test that cost 0$

 

I'll give that a try and report back. Thanks for the suggestion.

 

I'm not saying you're wrong, so please don't take it that way. Things may be different for the pre-VVTi trucks, or even pre-'04 trucks. But hear me out for a sec, maybe you'll agree, maybe not.

I'm personally having trouble with the thought of @healeyman installing a bottle of slip additive knowing that, if that's not the problem, now their limited slip may not function properly and be slipping all the time, especially when OP needs those clutch packs to catch. It'll continue to be that way for the next 15k-30k miles, or until OP decides to change his fluids again. That would suck.

I'm also struggling with the situation at hand, the symptoms described. If I'm reading right, they're having shudder between 0-15mph, while straight-line driving, or while turning. Thing is, LSD shouldn't be slipping/skipping if both wheels are turning the same speed (i.e. driving in a straight line), right? Chatter should happen primarily while turning, because the rear wheels would be moving at different speeds while in a turn, causing the LSD to "do what it do": Compensate for the differing wheel rotational speeds by slipping.

After pig-headed-ly refusing to listen to others on here about avoiding most synthetics with LSD rear diff, the chatter on my '06 never happened while straight-line driving. And it was 2x-3x far more noticeable while backing+turning out of my garage than it was accelerating from any stop sign while turning, or even while doing slow and sharp back/for turns in a parking lot. I've owned quite a few vehicles with positrac or similar LS rears. For me, chatter was always most noticeable while either backing out and turning, or doing sharp+slow figure-8s in a hot asphalt parking lot. I didn't get it in my '06 so much doing the parking lot thing, as I did when backing out. 2nd time I backed out after synthetic diff juice change, it was blatant. Like, "BLAM! HERE'S SOME CHATTER!" up until I got going 3-4mph, and it cleared out.


The one thing I'd highlight in all of this that's a commonality, and also something for @healeyman to test: What's the one thing we're all doing before we back out, before we accelerate?

Holding the brakes.

@healeyman can of course do the test of backing out and turning sharply at extremely low speed to check for chatter, but even if he does, it doesn't prove whether it's driveline or not.

I'm actually leaning more towards this being a sticking front caliper, slow front caliper + warped rotor, or maybe carrier bearing issue, like carrier is installed backwards, not bolted tightly driveshaft is clocked wrong (which is highly doubted after he went to a driveline specialty shop). I'd hope the driveline shop would've caught the carrier bearing as the problem, but ... let's look at things we can control here: Brakes. At least the front brakes.

I'd encourage @healeyman to find a parking lot with a few hundred yards of straight-line driving possibility, or a neighborhood street that's straight. Take the calipers out of the equation totally. How?

• Stop with the brake pedal, fully, leave the truck in park.
• Engage the parking brake, fully, truck still in park.
• Let off the brake pedal - the p-brake should hold the truck still as long as he's not touching the gas, if not, his p-brake isn't working correctly!
• Let it sit like this for 30-60 seconds, which should be ample time for a caliper to un-stick itself.
• Mash in the p-brake to release it, and accelerate forward - does it still shudder?

If yes, it's still possible it's the rear brakes ... Warped rotors and poorly adjusted drums have been known to cause shudder, and aftermarket drums specifically are notorious for being warped and causing vibrations/shudders.

But at least we could rule out one more suspect from the equation - calipers and rotors.

 

Shifty,
Thanks for all the input. I'm a bit busy over the next few days but I will go through all of you suggestions and let you know what I find out.

Since this is my first time on the forum I' having a little trouble figuring out how to reply to some of the suggestions that members have posted. Sometimes there is a small "reply' written on the right side of the post sometimes there isn't and then there is the reply at the bottom. Not quite sure how all of this works yet.

 

Easiest thing to do, if you want to reply directly to a person, is to go to the "QUOTE" link at the bottom of their text. It will insert their reply into the message-reply box, like you see here - I clicked the blue quote link, and as you see in my reply box at the bottom, it inserted your text with "QUOTE" tags, which makes it appear as you see above this paragraph. Hopefully that makes sense, if not, I can try to help explain it another way!:

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