3rd Gen Poll: Rear End Noise howling when feathering throttle

My service rep manager was telling me when he was a Toyota master tech they used to rebuild them in house.

I'd be down for that.

 

If it's back I'll have to go lemon law. It degrades the resale on the truck. I don't want something I will lose tons of money on. I don't plan on having it for more than 3 years because hopefully life will be where it needs to be and I have land and a Cummins Dodge by necessity.

 

Normal for this diff!!!

 

Mine not doing that yet but when it does I will be pissed too I would vote for the 4.30 as well I'm keeping my truck if it have to sooner or later replace the gears myself but I think with so many people having the issues Toyota should man up and take care of there customers!

 

Can you record the sound, and catch the exact speed as the recorded sound?

 

That is a great question. There may be a disconnect between the engineers and an implemented fix in the supply chain.

 

I did a lot of searching. An engineer would likely lose their job if they said what was wrong. They could get subpoenaed by a lawyer, and then the lawsuits would begin.

 

I think your first sentence has some gravity.

 

That could be in our futures.

 

Seems reasonable that they explain what makes this diff so special it whines and is normal yet every other diff on the planet doesn't when functioning properly

 

Super. I am pretty sure the real issue is ring and pinion tooth mesh. I would like to get my hands on one of these noisy third members and use a caliper and some gear paint myself. I am thinking the backlash or pinion depth is changing under load, and it is resonating through the housing between 40-65 mph. My opinion.

 

Imagine that.

 

Agreed or something with pinion preload

 

What it going to take I wonder someone getting hurt from a faulty rear end and lawsuits before Toyota gets serious about addressing this problem

 

Could be.

 

If they keep using this diff, they're gonna run in to more problems when this comes to a head.

 

I don't get it.

 

I noticed a lot of people are noticing more noise, right off the bat, with their replacement 3rd members.

Here's a thought. It is Toyota's policy to replace all failed, mechanical components with Supplier remaufactured parts. Not in all cases, but many.... if Toyota is taking the returned 3rd members, rebuilding them, but reusing the ring and pinion, this could leave you with more noise due to the now 2 or more wear patterns in the gears. You should always replace the gears, when reshimming an already broken in gear set.

 

Correct. Especially if a lawyer finds negligence.

 

This would not surprise me.

That or it's like musical diffs. They take one out, check it out, say it's normal and ship it off to an unlucky sob like me.