Question about Noisy Posi unit

[hpwrestler220]

Originally Posted by jdsent

Yes I bought the friction additive from a ford dealership.

This shouldn't really matter, but what kind of gears are they? FRPP?

I am sticking with incorrect install as my answer.

[PWRBY4D]

It could be also (at least with 4.10 and higher) that the pinion is spinning so fast that it does not keep fluid on it for long and the gears howl a bit. Honestly my 4.30's whine a bit but I am not concerned. Most of the time it is an install issue but keep in mind that many guys have this issue and run years and years without problems. I know guys that have had multiple shops install gears in there cars only to find the whining got worse or never got corrected. Some brands are said to be prone to some whine too.

Here is a useful link that explains what sounds probably mean.

http://escondidotransmission.net/Dri..._symptoms.html

[JohnnyGunz]

Originally Posted by hpwrestler220

I have been told by numerous people and mechanics that there is no need to break the gears in. If they are installed correctly, they should not be making any noises whatsoever... Mine don't make a single noise...

Take it back and tell them to fix it.

Just think about buying a new car. Do you break in those gears lol? No. As long as gears are set up the right way, you can drive it however the heck ya want.

what he said...+1