How are the two FRPP 4.10 ring gear & pinion sets different?
Ford Racing Performance Parts offers two different 4.10 ring gear & pinion sets. M-4209-G410M and M-4209-G410A. Does anyone have experience with these gears and have an opinion on the difference (how well they work) between them?
Edit; Removed redirect, kj
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'06 GT, manual, Satin Silver, lt. grey cloth int., IUP.
MODIFICATIONS - Goodyear F1 GS-D3s; 245/45 on 18x9, 275/40 on 18x10| Progress Technology springs & sway bars| Steeda adj. panhard bar, panhard brace, front control arm brace & bushings| strut tower brace| Tokico D-Spec dampers| CHE adj. LCAs & BMR relocation brackets |drilled & slotted front rotors| C&L intake| BamaChips SCT tune| FRPP 4.10 ring & pinion| Pypes off road H-pipes| FRPP GTA mufflers.
I saw something about a reverse cut??? no idea. anybody?
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Saleen S/C 3.2 pulley tuned by JDM Engineering, GT500 pumps, CHE goodies on the rear, 4.10's, KOOKS/ high flow catted X pipe with PYPES Violators, Spydershaft, TCI 3500 stall, PA deep tranny pan. Meziere w/p,M&H 325/45/17 DRs.
future mods.... a 3.0 pulley
Ford Racing Performance Parts offers two different 4.10 ring gear & pinion sets. M-4209-G410M and M-4209-G410A. Does anyone have experience with these gears and have an opinion on the difference (how well they work) between them?
Edit; Removed redirect, kj
Ok ... You can't even buy the M model anymore ... and if you can ... don't buy them. There is a reason for the new A model ... i can't remember exactly why ... but, the A version is a little more expensive ($40) ... so if you decide to buy them use the 410A's ... and as a side note ... 4.10s are for both autos and manuals
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05 Torch Red GT All options, minus red int, auto, and shaker 1000. JLT II with SCT XCAL2 from Bamachips, FRPP mufflers, and FRPP 4.10s. Aren't mod lists truly infinite?
91 Jeep Cherokee. It's my piece that I have to constantly fix, but can't justify getting rid of it, even with the woman harping on me that it's a waste of money. Do you hear me yelling at her for buying towels that I can't touch, cause it's "Decorative"?
I recall seeing a tech note somewhere from Ford stating they'd changed the way they hob (cut) gears on some sets from a 3-pass cutting process to a single pass one that produced more accurately cut teeth. That could be the difference here.
I recall seeing a tech note somewhere from Ford stating they'd changed the way they hob (cut) gears on some sets from a 3-pass cutting process to a single pass one that produced more accurately cut teeth. That could be the difference here.
This is correct ... i remember that now
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05 Torch Red GT All options, minus red int, auto, and shaker 1000. JLT II with SCT XCAL2 from Bamachips, FRPP mufflers, and FRPP 4.10s. Aren't mod lists truly infinite?
91 Jeep Cherokee. It's my piece that I have to constantly fix, but can't justify getting rid of it, even with the woman harping on me that it's a waste of money. Do you hear me yelling at her for buying towels that I can't touch, cause it's "Decorative"?
I was just told by a guy that the M stands for Motive and the M set is manufactured by Motive as opposed to the A set manufactured by Ford. Also, that the A set is being phased out and may not be available anymore, but they both are equal in quality.
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'06 GT, manual, Satin Silver, lt. grey cloth int., IUP.
MODIFICATIONS - Goodyear F1 GS-D3s; 245/45 on 18x9, 275/40 on 18x10| Progress Technology springs & sway bars| Steeda adj. panhard bar, panhard brace, front control arm brace & bushings| strut tower brace| Tokico D-Spec dampers| CHE adj. LCAs & BMR relocation brackets |drilled & slotted front rotors| C&L intake| BamaChips SCT tune| FRPP 4.10 ring & pinion| Pypes off road H-pipes| FRPP GTA mufflers.
I was just told by a guy that the M stands for Motive and the M set is manufactured by Motive as opposed to the A set manufactured by Ford. Also, that the A set is being phased out and may not be available anymore, but they both are equal in quality.
Actually when i bought my gears, i was informed that the M set is now phased out ... and that only the A set will be sold. The m set is what used to be cheaper ... hence the reason the cost has gone up. And if you look on ford racing they have switched from the m set to the A set ... i highly doubt they would switch back so soon.
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05 Torch Red GT All options, minus red int, auto, and shaker 1000. JLT II with SCT XCAL2 from Bamachips, FRPP mufflers, and FRPP 4.10s. Aren't mod lists truly infinite?
91 Jeep Cherokee. It's my piece that I have to constantly fix, but can't justify getting rid of it, even with the woman harping on me that it's a waste of money. Do you hear me yelling at her for buying towels that I can't touch, cause it's "Decorative"?
Patience - you have the first hand experience and my other source may have had the info for A & M transposed. And it may very well be that Motive makes the A set also.
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'06 GT, manual, Satin Silver, lt. grey cloth int., IUP.
MODIFICATIONS - Goodyear F1 GS-D3s; 245/45 on 18x9, 275/40 on 18x10| Progress Technology springs & sway bars| Steeda adj. panhard bar, panhard brace, front control arm brace & bushings| strut tower brace| Tokico D-Spec dampers| CHE adj. LCAs & BMR relocation brackets |drilled & slotted front rotors| C&L intake| BamaChips SCT tune| FRPP 4.10 ring & pinion| Pypes off road H-pipes| FRPP GTA mufflers.
Patience - you have the first hand experience and my other source may have had the info for A & M transposed. And it may very well be that Motive makes the A set also.
Actually i'm almost 100% positive that motive does not make the gears for ford racing ... hence the reason people always say buy FRPP to not have a whine ... if you use motive ... you always get a whine (there are very few installers that can get around the whine of the motives). I would doubt that motive makes a better gear just for FRPP than for themselves ... it would be just odd to me.
I also want to state that this doesn't mean that motive doesn't make any gears for ford racing, cause they do ... just in this case of the 4.10s .... i'm pretty positive they don't
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05 Torch Red GT All options, minus red int, auto, and shaker 1000. JLT II with SCT XCAL2 from Bamachips, FRPP mufflers, and FRPP 4.10s. Aren't mod lists truly infinite?
91 Jeep Cherokee. It's my piece that I have to constantly fix, but can't justify getting rid of it, even with the woman harping on me that it's a waste of money. Do you hear me yelling at her for buying towels that I can't touch, cause it's "Decorative"?
Actually i'm almost 100% positive that motive does not make the gears for ford racing ... hence the reason people always say buy FRPP to not have a whine ... if you use motive ... you always get a whine (there are very few installers that can get around the whine of the motives). I would doubt that motive makes a better gear just for FRPP than for themselves ... it would be just odd to me.
I also want to state that this doesn't mean that motive doesn't make any gears for ford racing, cause they do ... just in this case of the 4.10s .... i'm pretty positive they don't
As of today, I'm pretty positive they do. I just received my set of Ford Racing 3.73's for my 7.5" diff (FR P/N M-4209-L373M)
They were purchased directly from a large Ford Racing dealer, and arrived in a plain outer box (not a motive box) with the Ford Racing P/N stamped on it. Inside of the box were the gears, and an instruction sheet from Motive. I looked up the gear set on the Ford Racing website, and they have an instruction sheet downloadable there, that says "Ford Racing" all over it (not motive) but through 14 consecutive complex installation steps is word-for word identical to the steps on the Motive sheet packed with my gears.
It seems to me Ford Racing must be getting at least some of their sets from Motive. The coincidence in the sheets is just too much to be an "accident".
One thing I noted is that Ford Racing gears are advertised as having a black oxide coating (which mine have) while all the pics on Motive's site show raw steel gears. Is it possible that this is the difference? (I haven't bought Motive branded gears, so I don't know if they're actually delivered uncoated)
If that is the case, the black oxide could account for some of the noise performance difference, I found this on a material engineering site related to black oxide coating:
Improved lubrication characteristics: Black oxidized parts have improved lubricity and anti-galling characteristics due to the after-finish (oil or wax) resulting in smoother running, mating parts.
I broke down and paid for a long distance call to the Ford Racing Tech Hot Line, and learned:
The A set is made by Visteon
The M set is made by Motive
They both have the same specs and metal hardness
The M set is cheaper by about $35 (I assume this is because Motive makes gears in such quantities that they can sell for less)
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'06 GT, manual, Satin Silver, lt. grey cloth int., IUP.
MODIFICATIONS - Goodyear F1 GS-D3s; 245/45 on 18x9, 275/40 on 18x10| Progress Technology springs & sway bars| Steeda adj. panhard bar, panhard brace, front control arm brace & bushings| strut tower brace| Tokico D-Spec dampers| CHE adj. LCAs & BMR relocation brackets |drilled & slotted front rotors| C&L intake| BamaChips SCT tune| FRPP 4.10 ring & pinion| Pypes off road H-pipes| FRPP GTA mufflers.
I broke down and paid for a long distance call to the Ford Racing Tech Hot Line, and learned:
The A set is made by Visteon
The M set is made by Motive
They both have the same specs and metal hardness
The M set is cheaper by about $35 (I assume this is because Motive makes gears in such quantities that they can sell for less)
I went through the agony with the motive supplied FRPP gears a month and a half ago. They were installled at a ford dealer whose technician is a mustang specialist. He does upwards of 40-60 gear installs a year. It took him 8 hours and 3 tries and it still wailed like a banshee. After 2 weeks my parts supplier gave me his old FRPP 4.10 which he removed from his car when he went with 4.30's. The car was brought back to the same technician. In 2 hours he had the new(used) gears installed. They were perfect.
When we looked at the 2 week old gears the wear pattern was perfect but you could see where the metal was wearing like they were improperly hardened.
If I were to get another set I'd get them from JDM Engineering. The ones that have gone through the Mikronite polishing process.
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05 White GT Premium 5 Sp. IUP, Active Alarm
BMR, C&L, Centerforce, Fidanza, FRPP, GI Joe, JBA, JDM Engineering, LPW, Saleen, SCT, Steeda, SOS
How are the two FRPP 4.10 ring gear & pinion sets different? 
