help, my new gears whine!!!!!

[bugnout247]

my friend and I just put a set of used 373's in my car the other day and they ****ing whine below 2000 rpm's in 3rd and 4th gear ....we had done it before on my previous mustang with no problem except that i put a new set a gears in that mustang and not used ones like this job...the shim under the old pinion bearing was 74 according to the dial indicator so i used 2 shims that i got with my shim kit to equal the 74. It seems to me that is should've worked like a charm but no..it ****ing whines like a banshee....one dude suggested that the pinion nut is not tightened down far enough...another said that it's definately because i installed used gears...i would really like to make an adjustment and fix it to avoid buying a new set of gears..but i need to fix this noise no matter what the remedy

 

[Silver95Stint]

I had that same pinion nut problem bro. It whines but I just dealt with it. Still haven't gotten it fixed. My Gears were brand new though, and I never remedied it.

 

[95GTeee]

Some gears are just made more noisy than others. I had the same problem with some Genuine Gears and I heard Richmonds were noisy too. Cut your losses and just get the FMS gears. It definitely could be a pinion depth problem.

 

[Silver95Stint]

Some gears are just made more noisy than others. I had the same problem with some Genuine Gears and I heard Richmonds were noisy too. Cut your losses and just get the FMS gears. It definitely could be a pinion depth problem.

How bad would that pinion depth problem be? I have Ford Racing gears and they seemed to be noisy as well. Nothing intolerable though, just a reminding type of noise to keep me aware of the situation.

 

[AznStanger3v]

you arent messing anything up, but if it annoys you that much, start over. thats really the only thing anyone can tell you.

 

[bugnout247]

they are richmond gears..but since i used the same shim..i thought the backlash would be just right and not whine...i mean i used richmond gears in my old stang and there was no whine..what gives...the noise is driving me nucking futs

 

[89MustangGX]

With other than FMS gears you will need to measure everything. Actually, I'd do it or have it done even with FMS gears. You can't just assume the same pinion depth. The fact that they're used makes it harder to ensure they'll be quiet, but it sounds like it's time to take it back apart.

 

[95GTeee]

Dude ... the Richmond gears are just a louder cut of gear! They are gonna whine. Starting over isn't such a bad thing. I had to do it twice before I gave up on my other gears and got sick of it and bought the FMS gears. If it's THAT annoying to ya - cut your losses and buy some FMS gears - mine are perfect now.
If you check the lube and you dont find shiny crap in there .. 17YO is right, no problems - just noisy, and you have to decide if it's worth it to you to change them out for peace and quiet. To me, it WAS worth it. I hated driving my car with it sounding like something was wrong all the time.

Chicks dont dig a car that sounds messed up!!

 

[bugnout247]

if i take it all out and remeasure the pinion and such....what do i measure exactly ...and with what tools...can it be done in my garage?

 

[Joes95GT]

Dude ... the Richmond gears are just a louder cut of gear! They are gonna whine.

That is so far from the truth that it's not even funny.

Richmond gears could possibly have less tolerances than Ford's do, however, plainly stating that Richmonds are a loud cut gear and they are going to whine, is incredibly incorrect.

To the original poster: you cannot assume pinion depth will be the same if you use the same shim, especially with gears other than Ford gears. Even with Ford's gears, you must check. With my car, we had to use a .006" thicker shim to get the best pattern, and that was with FMS gears.

Joe

 

[RIO5.0]

Did you check the pattern???? how much backlash did you have, was it within spec .008-.015??? those two things should have been a good indicator of the set-up before closed it up...
Re-checking that pattern should tell you which way to re-adjust it...

 

[bugnout247]

how do i check the pattern or depth measurements??? do i use a tool i can get at a rental place or a small tool i can just buy...and how would i use it....i'm unsure of what part of the gears to measure

 

[final5-0]

If the gears were ruined when you got them, nothing you can do will take the whine away.

You might get them to make less noise but you won't get them to run quiet like they should.

If they were ok when you got them and the whine is due to your install, STOP driving with them now. If you have driven them in that condition for only a short distance then perhaps they can be made to run quiet with the PROPER setup.

Later
Grady

 

[RIO5.0]

how do i check the pattern or depth measurements??? do i use a tool i can get at a rental place or a small tool i can just buy...and how would i use it....i'm unsure of what part of the gears to measure

Im not pro..i have done 2 sets of FMS gears...direct swaps using the same shim under the pinion to the new, backlash came into spec and the pattern was sweet....both sets were noise free and have been for 15k miles...

If you failed to check either of these than thats a no no....

FMS gearset will NORMALLY fall right into spec with only swapping the pinion shim over to the new set... .075 thickness on the shim you put under there??? that seems way large....seems it more like half that for a FMS set....

The pattern can be checked by simply putting marking or pattern grease on and turning the dif....you can see how the gears mesh....
did you check the backlash with a dial indicator on the ring gear??? another sign that would have told you thing were wack....not enuf or to much backlash or "slop" lets say in the set-up...
read up on this link...it will help on the next time around...go to the pattern section...do yours up and it will help point you in the right direction for a fix

http://www.corral.net/tech/drivetrain/gears.html

Good luck....

 

[mo_dingo]

To check the gear pattern, get some "Prussian Blue" from Napa. That will tell you if you are off pinion depth wise.

To check backlash, you need a Dial Indicator w/ magnetic base. Check out the link at the bottom of my sig. In my post I think it tells you exactly how to measure backlash (backlash = maximum distance between a pinion tooth & an adjacent ring gear tooth)

I also linked 3 install write-ups. It will tell you how to setup the dial indicator & use the prussian blue.

I used FMS gears, so I only had to add .001 to my pinion shim, and no changes to the carrier shims.
Scott