GT Performance Mods 2005+ Mustang GT Performance and Technical Information

4.10's are in and I am loving it!

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Old Oct 21, 2007 | 06:45 AM
  #1  
mustanglouie's Avatar
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4.10's are in and I am loving it!

I just got a set of FRPP 4.10's put in yesterday and I love how hard it pulls now. I almost wish I would have went for the 4.30's. But they do pull hard and I am glad that I got them. This mod was well worth the money!
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Old Oct 21, 2007 | 07:53 AM
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From: Tewksbury, MA
I had mine installed a few weeks ago. I know im not the first, but last night was the first time I was able to chirp my tires into 3rd gear , basicly the first time I acually got on it since the install. I was surprised I could do it condsidering my tall rear tires.
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Old Oct 21, 2007 | 09:22 AM
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Congrats on the install. I am going to get some 4.10's after the holidays but I will need some drag radials to go with them. My auto '07 has always spun the tires hard in 1st and chirped 2nd and 3rd before I installed any mods. After Dougs race tune and CAI 2nd and 3rd can get down rite hairy in cooler weather. For an auto with 3.31's the quickness of the gear changes is quite nice. 4.10's will be awesome. Where did you buy your gears?
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Old Oct 21, 2007 | 11:36 AM
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How does it feel cruising at 60-70 ?
I want to get these as well for performance but I also use it as a DD so need it not to be running to high when on the highway at 70 MPH.
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Old Oct 21, 2007 | 11:41 AM
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4:10's are the perfect gear for the S197 5 speed manual because 5th is almost like an overdrive. 70 MPH is 2400 RPM's and what's nice is when you want to pass just press down on the gas pedal because you have lots of power being higher in the RPM band. I had 4:10's and had to replace them because of poor installation. DON"T CHEAP OUT ON THE INSTALL. GET SOMEONE WHO KNOWS WHAT THEY ARE DOING!
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Old Oct 21, 2007 | 11:43 AM
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with 4.10's 70 mph is 2400 RPM
whats stock like 2000 RPM?
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Old Oct 21, 2007 | 01:45 PM
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whats the best price on the frpp 4.10's

whats a good price on the install too???
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Old Oct 21, 2007 | 02:05 PM
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Brenspeed has them for $150
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Old Oct 21, 2007 | 03:04 PM
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From: Tewksbury, MA
Originally Posted by Larmo
Brenspeed has them for $150
Those are Motive. I got my FRPP gears at mustangsunlited.com for about $220, and about $100 for the install kit. I had a Ford dealership install them, which cost me about $550.
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Old Oct 21, 2007 | 03:09 PM
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$550 for the install?

Is the install kit for $100 required?
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Old Oct 21, 2007 | 03:10 PM
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Talk to Tillman! He always has a great deal waiting on FRPP gears and Mustang Source customers!
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Old Oct 21, 2007 | 05:19 PM
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hey guys yeah I got my stuff from americanmuscle.com . I haven't got on the interstate yet. But it gets up to 100 on the back roads pretty quick now. Like someone said 5th gear feels so much better and i am not consantly changing gears when slow cars get in front of me. Usually 5th has enough power to keep me moving.
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Old Oct 21, 2007 | 11:07 PM
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this may be my next mod.....

how badly is highway mpg affected?

my car is my daily driver but i want it to go!
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Old Oct 22, 2007 | 07:32 AM
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From: NOVA
My gas mileage went down about 2 mpg after I had the 4.10's put in but since I added the Spydershaft it is going back up. I+ mpg so far but that tank includes the dyno tune and some high speed driving to check the new driveshaft for vibration. I had Ford do the install so I knew it was done right. I also added Royal Purple 75w140 when they did the install.

As others have written, the gears really give you that added pop in 4th and 5th gear. A great mod for those of us that don't have a S/C.
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Old Oct 22, 2007 | 02:47 PM
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Any new vibrations in the drivetrain after install?
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Old Oct 22, 2007 | 06:25 PM
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RKNMACH, you said you had the dealer install your 4.10 gears? How much did they charge you???
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Old Oct 23, 2007 | 07:20 AM
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From: NOVA
Originally Posted by Couper93
Any new vibrations in the drivetrain after install?
I've had it up to 90 and didn't have any vibrations. Lot of traffic in the DC area so I haven't been able to safely go any faster. 90 is all I need since I don't plan on racing the car.

RKNMACH, you said you had the dealer install your 4.10 gears? How much did they charge you???

I paid $485 for the install - I provided all of the parts and the RP gear oil. They had to replace a bearing and there's always a charge for shop supplies. They did a great job and I'm satisfied with the results.
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Old Oct 23, 2007 | 10:33 AM
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From: SoCal
Originally Posted by RKNMACH
I've had it up to 90 and didn't have any vibrations.
120 here! No vibrations either!

And that's with the 4.10's coupled to the 1-pc Coast alum. DS.
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Old Oct 23, 2007 | 11:55 AM
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Originally Posted by TacoBill
120 here! No vibrations either!

And that's with the 4.10's coupled to the 1-pc Coast alum. DS.

So you have a one piece driveshaft.
I put 4.10's in my ol 93 coupe and had to get an aluminum driveshaft to eliviate the drivetrain vibration.
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Old Oct 23, 2007 | 03:56 PM
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Originally Posted by RKNMACH
I paid $485 for the install - I provided all of the parts and the RP gear oil. They had to replace a bearing and there's always a charge for shop supplies. They did a great job and I'm satisfied with the results.
Maybe I'm missing something here. The install is on average 90 minutes and it cost you $485? That's quite a labor rate!!!
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