anyone changed the gears in the rear end?

04SVT · 01-05-2005, 11:05 AM

I had a 4:10 gears installed in my TransAM WS6 and it made an incredible low end difference. Has anyone changed the gears in their Cobra. I've spoken to several people about this and have got different opinions from every one.

blk04cobra1 · 01-05-2005, 12:46 PM

some have said not too b/c of the torque on the IRS, but my guess is if you support the IRS enough, why not? I know the 4.10's make a huge low-end difference on the GT's...

crunchit · 01-05-2005, 06:41 PM

The tech at ford who does my mods for me advised me not to move up to 411's. Said the IRS would wouldn't fair well for all the street driving i do. Reccomended 373's. Said I'd still get good bottom end. I hope this helps.

smashedheadcat · 01-05-2005, 09:55 PM

A set of 3.90's are about as agressive as you'd want to go with the '03s. Most keep the 3.55's though.

jack · 01-05-2005, 11:15 PM

I have rode in a 4.10 geared car. The owner and i both thought it was to much gear for the car. He is changing to 3.73's soon. The car felt like it lost some power by not letting the supercharger work because of the quicker rise in rpm's.

redsnake99 · 01-06-2005, 12:17 AM

I changed the stock 3.27 out for 3.55 in my 99 Supercharged Cobra. This was done about the same time I put the 6-speed tranny in. I have the same drivetrain as the 03-04's and it's a great combination for me. I spend only a couple of days a year at the drag strip, so higher gear ratio than 3.55 is ridiculous for me. I drive the car every day, road race it much more than drags.

I did notice though at Gingerman, I always seemed to be unable to use the top rpm's to my advantage, with most of the long runs needing a gear change near the end of the straght. I guess this is why the pro racers have several gear ratios they can choose from to best match the track they are running on.

flynfink · 01-06-2005, 01:52 PM

4.30's in my NA 99'. If I have to do it again, I'd probably go with 4:10's. Big difference from the stock gearing.

nckissfan · 01-20-2005, 05:27 PM

how much should a set of gears go for? I saw a set of Ford Racing 4.10's on Summit Racing for $199. This a good price? Would the 4.10's benefit my 97? I do daily drive the car, so would that not be a good idea? Any other suggestions? Thanks guys!

flynfink · 01-20-2005, 05:31 PM

Quote:

Originally Posted by nckissfan

how much should a set of gears go for? I saw a set of Ford Racing 4.10's on Summit Racing for $199. This a good price? Would the 4.10's benefit my 97? I do daily drive the car, so would that not be a good idea? Any other suggestions? Thanks guys!

go for it Mikey, you'll love the difference. $199 is about right. Install on your solid axle is less expensive than on my 99 IRS. Maybe about $200??

nckissfan · 01-20-2005, 05:35 PM

Quote:

Originally Posted by flynfink

go for it Mikey, you'll love the difference. $199 is about right. Install on your solid axle is less expensive than on my 99 IRS. Maybe about $200??

I am working on the install price right now, I found a set of Richmond's on Summit for $185. I am ready for a little change. Zooma, zoom, zoom!!

mus302 · 01-26-2005, 07:43 AM

Quote:

Originally Posted by nckissfan

I am working on the install price right now, I found a set of Richmond's on Summit for $185. I am ready for a little change. Zooma, zoom, zoom!!

Check out Performance Parts, Inc in the vendors section. They have FRPP 8.8 gear sets on their website for $169.99. And I think we get a discount off of that price as well.

**cobrabitn** · 01-26-2005, 08:42 AM

I just ordered a set of gears for my 94 Cobra... get them from Gene Evans Ford or Late Model Restoration for $139.00 for FRPP. Plus you get a discount from Late Model as a club member.

Gene Evans - www.gefracing.com
Late Model Restoration - www.50resto.com

Hope that helps!

RF Cobra · 01-26-2005, 10:28 PM

Quote:

Originally Posted by nckissfan

I am working on the install price right now, I found a set of Richmond's on Summit for $185. I am ready for a little change. Zooma, zoom, zoom!!

You trying to make sure that you get pulled over for doing more than 2 mph over the limit next time?

I can't remember if my father-in-law put 3.73 or 4.10s in his 97 but it made big difference on the bottom end.

lorahcobra · 01-30-2005, 01:02 PM

We are having 3.73's installed on our '03 as we speak

. A whole slew of under-the-car stuff is going with them so it will be a couple of weeks before we can give you a "what we think" report...but will try to remember to do that.

As far as price, I wouldn't pay more than $140 or so, we bought ours at UPR's set-up at FFW for $130 cash (no tax, no shipping)

jack · 01-30-2005, 05:05 PM

lorahcobra, if you dont mind me asking who are you having install the gears? Also how much are they charging to install the gears?

01-05-2005, 11:05 AM	#1
04SVT Registered User Join Date: Oct 2004 Location: Florida Posts: 23	anyone changed the gears in the rear end? I had a 4:10 gears installed in my TransAM WS6 and it made an incredible low end difference. Has anyone changed the gears in their Cobra. I've spoken to several people about this and have got different opinions from every one. __________________ 04 SVT Cobra #2938 of 3768 Mods.. Flowmaster American Thunder Cat Back K&N FIPK SuperChips Tuner 396 RWHP

01-05-2005, 06:41 PM	#3
crunchit Registered User Join Date: Sep 2004 Location: Queens NY Posts: 163	The tech at ford who does my mods for me advised me not to move up to 411's. Said the IRS would wouldn't fair well for all the street driving i do. Reccomended 373's. Said I'd still get good bottom end. I hope this helps. __________________ ____________________ K&N CAI SLP Loud Mouth, x-pipe, race converters 2.80 steeda pully Steeda T56 shifter Steeda Springs 477.9 RWHP (std) 511.4 RWTQ (std) Modena ROH 3 piece Wheels 19x10.5 (r), 19x9(f) ____________________

01-05-2005, 09:55 PM	#4
smashedheadcat Registered User Join Date: Oct 2001 Location: Geneva, Switzerland Posts: 1,727	A set of 3.90's are about as agressive as you'd want to go with the '03s. Most keep the 3.55's though. __________________ Josh 2003 Oxford White Cobra Coupe Twin Turbo Solid Axle Automatic Return Fuel System 1997 Triple Black Cobra Convertible Forged and Blown. 511rwhp 398 rwtq Sold

01-05-2005, 11:15 PM	#5
jack Registered User Join Date: Oct 2004 Location: Rutledge, TN Posts: 141	I have rode in a 4.10 geared car. The owner and i both thought it was to much gear for the car. He is changing to 3.73's soon. The car felt like it lost some power by not letting the supercharger work because of the quicker rise in rpm's. __________________ MGW Shifter/Red Handle 3.00 Upper Pulley JDM Air Filter Hypertech Programmer Metco Idler Pulleys Magnaflow Exhaust Next Ported S/C

01-06-2005, 12:17 AM	#6
redsnake99 SCMC Member Join Date: Jun 2001 Location: NV, NY, SC Posts: 1,241	I changed the stock 3.27 out for 3.55 in my 99 Supercharged Cobra. This was done about the same time I put the 6-speed tranny in. I have the same drivetrain as the 03-04's and it's a great combination for me. I spend only a couple of days a year at the drag strip, so higher gear ratio than 3.55 is ridiculous for me. I drive the car every day, road race it much more than drags. I did notice though at Gingerman, I always seemed to be unable to use the top rpm's to my advantage, with most of the long runs needing a gear change near the end of the straght. I guess this is why the pro racers have several gear ratios they can choose from to best match the track they are running on. __________________ Dave Stanfield - SCMC 424

01-05-2005, 12:46 PM	#2
blk04cobra1 Registered User Join Date: Nov 2004 Location: Charlotte, NC Posts: 1,374	some have said not too b/c of the torque on the IRS, but my guess is if you support the IRS enough, why not? I know the 4.10's make a huge low-end difference on the GT's...

01-06-2005, 01:52 PM	#7
flynfink Registered User Join Date: Jun 2001 Location: Concord, NC Posts: 1,002	4.30's in my NA 99'. If I have to do it again, I'd probably go with 4:10's. Big difference from the stock gearing. __________________ Jeff F. AKA FlynFink 07' Porscha Cayman S 99' Rio Red Cobra Vert. #203 of 4055 94' Black Cobra Coupe #4971 of 5009 "Drive it like ya stole it"

01-20-2005, 05:27 PM	#8
nckissfan Everyone hates a winner! Join Date: Jan 2004 Location: Browns Summit, NC Posts: 2,810	how much should a set of gears go for? I saw a set of Ford Racing 4.10's on Summit Racing for $199. This a good price? Would the 4.10's benefit my 97? I do daily drive the car, so would that not be a good idea? Any other suggestions? Thanks guys! __________________

01-26-2005, 08:42 AM	#12
cobrabitn Dr Jekyll on the street, Mr Hyde on the track Join Date: Jun 2001 Location: Rock Hill SC Posts: 14,649	I just ordered a set of gears for my 94 Cobra... get them from Gene Evans Ford or Late Model Restoration for $139.00 for FRPP. Plus you get a discount from Late Model as a club member. Gene Evans - www.gefracing.com Late Model Restoration - www.50resto.com Hope that helps! __________________ Cobrabitn 2016 Ruby Red Metallic with Caribou accent F-350 Crew Cab Stump Puller! 6.7 Diesel Automatic with Chrome Package, Off Road Package, 3.55 Locking axles, and Ultimate Lariat Interior Trim Package! 2017 Shelby GT350 Coupe - track car! Mods: JLT True Cold Air oil catch can 2009 Vista Blue Shelby GT 500 Coupe - Garage Queen Tinted Windows JLT True Cold Air Kit Pro-Dyno Tune 526 rwhp - 511 rwtq 1994 Rio Red Indy Pace Car #22 "Runabout" Snake in the grill MGW shift knob 1996 SVT Cobra Wheels 1969 New Lime Mustang Mach 1 Sportsroof - Second owner - bone stock with shaker. One SVT Cobra, one Shelby GT500, one 69 mach 1, and a Shelby GT350 is better than nothing! Custom Data Plates for your Mustang or Ford! Buy "Cool Merchandise" at Data Plates Plus www.dataplatesplus.com See my MSR Video here!

01-30-2005, 01:02 PM	#14
lorahcobra SCMC Member Join Date: Sep 2003 Location: west knoxville Posts: 130	Rear Gears!!! We are having 3.73's installed on our '03 as we speak . A whole slew of under-the-car stuff is going with them so it will be a couple of weeks before we can give you a "what we think" report...but will try to remember to do that. As far as price, I wouldn't pay more than $140 or so, we bought ours at UPR's set-up at FFW for $130 cash (no tax, no shipping) __________________ Steve and Crystal Lorah '03 Carroll Shelby Tribute Edition Yellow Cobra 'Vert "BrightSnake" 474rwhp, 476rwtq "Burn rubber, not your Soul"

01-30-2005, 05:05 PM	#15
jack Registered User Join Date: Oct 2004 Location: Rutledge, TN Posts: 141	lorahcobra, if you dont mind me asking who are you having install the gears? Also how much are they charging to install the gears? __________________ MGW Shifter/Red Handle 3.00 Upper Pulley JDM Air Filter Hypertech Programmer Metco Idler Pulleys Magnaflow Exhaust Next Ported S/C

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