IMPORTANT FRPP gear info.
02-25-2009, 06:26 PM
#1
4th Gear Member
Thread Starter
Join Date: Dec 2007
Location: Maryland
Posts: 1,503
IMPORTANT FRPP gear info.
Wow these 4.10s are nice. For those who don't already know, many FRPP gear sets are now actually Motive or USA, presumably because of the abundance of demand, and are drastically different in there appearance (chrome instead of black) and install specs (backlash range of 3-6 rather than 11-16, I think). I never noticed it, but the part number on the box ended with "M" (for Motive) with "made in italy" printed under it. The USA "FRPP" gears part # ends with A. I have a hard time thinking Ford would outsorce manufacturing that would result in a lower quality, but in my and my installers opinion, the true FRPP gears are better because the grooves are formed by a "5 cut" process rather than the less precise "2 cut" of the Motives and USA and for the fact that installers, like the one who did mine today, are less familiar with the newer style of gear. Thought I was hearing a slight rear end hum sound driving home but I could be paranoid. We shall see.
02-25-2009, 07:36 PM
#4
4th Gear Member
Thread Starter
Join Date: Dec 2007
Location: Maryland
Posts: 1,503
Just curious...you think it's more the installer's bad or the gears? Did they whine from the start or did it take a bit? Thx bro.
Last edited by rygi23; 02-25-2009 at 07:39 PM.
02-25-2009, 07:40 PM
#5
5th Gear Member
Join Date: Apr 2005
Location: Richmond, Virginia
Posts: 4,083
The whine occurred right off the bat if I remember correctly. And I would say it's a mixture of the installer, the gears, and sheer luck. This guy does a lot of work with Mustangs that are serious about racing and has done gears for hundreds of them and he says that sometimes you'll get whine, sometimes you won't. Sadly, my 25% Irish heritage didn't pull through for me and I am stuck with gear whine, lol.
02-25-2009, 07:45 PM
#6
4th Gear Member
Thread Starter
Join Date: Dec 2007
Location: Maryland
Posts: 1,503
The whine occurred right off the bat if I remember correctly. And I would say it's a mixture of the installer, the gears, and sheer luck. This guy does a lot of work with Mustangs that are serious about racing and has done gears for hundreds of them and he says that sometimes you'll get whine, sometimes you won't. Sadly, my 25% Irish heritage didn't pull through for me and I am stuck with gear whine, lol.
02-25-2009, 08:53 PM
#10
5th Gear Member
Join Date: Apr 2005
Location: Richmond, Virginia
Posts: 4,083