I had one on my car for a few years. Had 3.70 gears and always had some minor gear noise.  Nothing like the gear noise my new nodular iron setup from Strange produced!  It howled.  They rebuilt the iron one with Stealth gears that are supposed to be silent, in 3.50 ratio.  I have not had time to reinstall it since I have been busy with construction of the new shop.

If you want aluminum, this one is for sale.  3.70 ratio. Traction lock 31 spline.

The experts I talked to said a light car like a Mustang usually cannot tell the difference.

MS I recall reading your post about your gears.  I would consider the aluminum setup but I already have a locker and it requires the larger 3.062 bearings.

I've also read that the Strange aluminum case has more issues and one should buy a Moser case.  I've also read some have had issues with getting the pinion seal to seal.  I had also read the aluminum case was only good for race cars under 2300lbs.

I bought cheap gears for my truck and they made noise from the start.  If I recall I got them about $50 with a damaged box.  I can not say if it was the gears or my fault.  The setup pinion bearing I used was about .040 difference from the bearing I installed.  So when I set the pinion depth and installed the new bearing, I did not realize there was something wrong when I put it back together and drove it.  I should have known because I had to reset my backlash but I didn't question it!  I tore it back apart and discovered the pinion was .040 to deep.  I reset it to the correct depth but they still made noise.  I've been driving it like this for about 8 months or more.  I just found a set of new ford gears for a great price and will install the ford gears in the very near future. 

TKOPerformance wrote:

RTM wrote:

MS I recall reading your post about your gears.  I would consider the aluminum setup but I already have a locker and it requires the larger 3.062 bearings.

I've also read that the Strange aluminum case has more issues and one should buy a Moser case.  I've also read some have had issues with getting the pinion seal to seal.  I had also read the aluminum case was only good for race cars under 2300lbs.

I bought cheap gears for my truck and they made noise from the start.  If I recall I got them about $50 with a damaged box.  I can not say if it was the gears or my fault.  The setup pinion bearing I used was about .040 difference from the bearing I installed.  So when I set the pinion depth and installed the new bearing, I did not realize there was something wrong when I put it back together and drove it.  I should have known because I had to reset my backlash but I didn't question it!  I tore it back apart and discovered the pinion was .040 to deep.  I reset it to the correct depth but they still made noise.  I've been driving it like this for about 8 months or more.  I just found a set of new ford gears for a great price and will install the ford gears in the very near future. 

Even with the difference in pinion depth the noise is almost certainly still caused by the gears.  Gears can be run setup wrong for a long while and not damage them (unless the backlash was too tight).  They are made from a really, really hard alloy with a serious heat treatment that makes it even harder on the wearing surfaces.  Noise on deceleration from the beginning is especially indicative of the gears themselves being the culprit (if everything is set up right).  That same noise on an old rear is more indicative of worn out bearings which have allowed the backlash to open way up.  By the time that's happening though I will replace the gearset as well.  You'll find by that point that the gears are so old they are becoming fatigued and the surface hardness is much less than it should be from years of getting hot and being allowed to cool in oil. 
 

Good to know.  
 

Moser still hasn't replied to my email request.

MS I have thought about yours but I don't want to run a trac loc.