4.10 Gear swap in 98 cobra

blackonblack · August 5th, 2006, 04:19 PM

I have a 98 cobra that I am wanting to change out the stock 3.27's for some 4.10s and get a tuner for it and i had a few questions-

First- Are 4.10's to much for a daily driver?....what Rpm's do you turn going 70?

I know that after changing the gears I the speedometer will be off, since this is a manual transmission do i need to get a speedometer recalibration gear from steeda? or can i just get a gear kit from mustangtunging.com that comes with the gears and the X-Calibrator 2 from SCT since i am looking to get a tuner too.

Or do i need both?

Thanks

AtlanticBlue99 · August 5th, 2006, 04:43 PM

You have a 5 speed, so I would suggest 3.73s, but 4.10s are not too much gear. at 70, in o/d, i turn 3k rpms. you could be set with a speedcal

blackonblack · August 5th, 2006, 04:54 PM

I have other mods as well that why i was considering the gears and X-Calibrator kit from Musangtuning....i was hoping to get all the power i could out of the mods i already have.

you turn 3 grand with a 4speed auto correct?

thanks

AtlanticBlue99 · August 5th, 2006, 04:56 PM

Yes, that's correct. You may want the XCal-2 then, to optimize gains on what is already done. If you drive highway a lot or don't see much track time if any, then 3.73s may be the best.

flattusmaximus78 · August 5th, 2006, 07:17 PM

IF your keeping it n/a 4:10's would be just the thing for the extra umph. As a daily driver if you get a none brand name they wine a little, work just as well as say fords racing gears but when going through gears at normal speeds they wind up, then down when decreasing speed. Not to noticable unless your in the back seet. There bad if you plan on a s/c because you will be in 4th way before you know it cause they are steep.

blackonblack · August 5th, 2006, 08:19 PM

I keep hearing everybody say that when the swapped to 3.73's that they wish they had went ahead with the 4.10's. I drive it mostly at night and on the weekends....i dont really have any intention of it being a track beast or anything....i just want people to see the cobra badge and know i mean business...

There are so many of the 96-98 cobras that just dont seem like they are as fast as they should be

flattusmaximus78 · August 5th, 2006, 08:25 PM

There not as fast as they could be and thats true. But keep in mind they came with 305 horse which is 45 over a stock gt so thats a huge upgrade. None the less there pretty responsive to some mods. Get some cams, exaust, gears, and better flowing heads, and while your at it a 75 shot. Then your really ganna mean seriouse buisness!

Twist 2 Go · August 6th, 2006, 12:05 AM

go w/ the 4.10's. It's a Cobra so it likes to rev a little high to keep it on the powerband. A lot of the 4V guys use 4.30's.

Casper98GT · August 6th, 2006, 10:25 AM

Yeah this is no joke. Im agree'n with Twist. Have any of you recommending 3.73's ever driven a Cobra... or any 32v ford car. They LOVE to be held in the upper rpms. And they just keep pulling and pulling. I say go with 4.10's. They will bring you to the power range so much quicker than a 3.73 will. Also its a 1998 so youre gonna need a new transmission speedo gear for the gear when you put them in. Cant use a elect. programmer for it because our speedo clusters are stupid. 99+ you can. Everyone of my buddys with Mach 1's go with 4.30's. Amazing gear for those 32v's.

AtlanticBlue99 · August 6th, 2006, 10:42 AM

I've driven a stock cobra, and they do hang up there really good to 7k rpms. If others are doing it no problem, then do it. The steeper the gear, the better

orangeRcode · August 6th, 2006, 12:45 PM

I had a set of FRPP 4.30s but opted for the 4.10s. 4V love rpms. I would not hesitate to put 4.10s in a dd. I only turn 2350 at 70 with 4.10s on my 5 speed but I do have the 3560 tranny which I believe has a different 5th gear ratio. I have a buddy with a 97 Cobra 5 speed. He recently had 3.73s installed and now wishes he would have went with more gear. Not a bad time to upgrade the axles and locker especially if you going to run drag radials or stickies.

blackonblack · August 6th, 2006, 05:45 PM

I Think ill go with the 4.10's, tuner and speedo gear since you apparently have to have it.

does anyone know how hard it is to change out the speedo gear in the tranny? I know they arn't expensive.... steeda makes one for like 15 or so.

Casper98GT · August 6th, 2006, 09:47 PM

Black.... put the car up and look on the left side of the trans. there will be a black tube sticking out with a white center. remove the 8mm bolt and remove it. then take off the metal clip holding it on and replace it.

Thats all.

August 5th, 2006, 04:19 PM	#1
blackonblack Newbie Join Date: Aug 2006 Posts: 6 iTrader: 0 reviews	4.10 Gear swap in 98 cobra I have a 98 cobra that I am wanting to change out the stock 3.27's for some 4.10s and get a tuner for it and i had a few questions- First- Are 4.10's to much for a daily driver?....what Rpm's do you turn going 70? I know that after changing the gears I the speedometer will be off, since this is a manual transmission do i need to get a speedometer recalibration gear from steeda? or can i just get a gear kit from mustangtunging.com that comes with the gears and the X-Calibrator 2 from SCT since i am looking to get a tuner too. Or do i need both? Thanks

August 5th, 2006, 04:43 PM	#2
AtlanticBlue99 I Post Entirely Way Too Much 1999 Ford Mustang V6 14.79 @ 92.15 Join Date: Aug 2005 Location: University of Georgia Posts: 8,854 Blog Entries: 1 iTrader: 0 reviews	You have a 5 speed, so I would suggest 3.73s, but 4.10s are not too much gear. at 70, in o/d, i turn 3k rpms. you could be set with a speedcal __________________ ModdedAutos 1999 Mustang V6 I used to list my mods here but stopped when I exceeded 255 characters.

August 5th, 2006, 04:56 PM	#4
AtlanticBlue99 I Post Entirely Way Too Much 1999 Ford Mustang V6 14.79 @ 92.15 Join Date: Aug 2005 Location: University of Georgia Posts: 8,854 Blog Entries: 1 iTrader: 0 reviews	Yes, that's correct. You may want the XCal-2 then, to optimize gains on what is already done. If you drive highway a lot or don't see much track time if any, then 3.73s may be the best. __________________ ModdedAutos 1999 Mustang V6 I used to list my mods here but stopped when I exceeded 255 characters.

August 5th, 2006, 07:17 PM	#5
flattusmaximus78 I Post Entirely Way Too Much 1993 5.ohhhh 12.97 @140mph Join Date: Apr 2006 Location: Gatorland Posts: 6,122 iTrader: 3 reviews	IF your keeping it n/a 4:10's would be just the thing for the extra umph. As a daily driver if you get a none brand name they wine a little, work just as well as say fords racing gears but when going through gears at normal speeds they wind up, then down when decreasing speed. Not to noticable unless your in the back seet. There bad if you plan on a s/c because you will be in 4th way before you know it cause they are steep. __________________ 02 Pewter z28, hoosiers/lid/exhaust/spray...125mph 1993 gt Sold, already missed --Moates Quarter horse $225-- --Cobra intake $150-- --tremec 3550 bell and shifter $1100--

August 5th, 2006, 08:25 PM	#7
flattusmaximus78 I Post Entirely Way Too Much 1993 5.ohhhh 12.97 @140mph Join Date: Apr 2006 Location: Gatorland Posts: 6,122 iTrader: 3 reviews	There not as fast as they could be and thats true. But keep in mind they came with 305 horse which is 45 over a stock gt so thats a huge upgrade. None the less there pretty responsive to some mods. Get some cams, exaust, gears, and better flowing heads, and while your at it a 75 shot. Then your really ganna mean seriouse buisness! __________________ 02 Pewter z28, hoosiers/lid/exhaust/spray...125mph 1993 gt Sold, already missed --Moates Quarter horse $225-- --Cobra intake $150-- --tremec 3550 bell and shifter $1100--

August 5th, 2006, 04:54 PM	#3
blackonblack Newbie Join Date: Aug 2006 Posts: 6 iTrader: 0 reviews	I have other mods as well that why i was considering the gears and X-Calibrator kit from Musangtuning....i was hoping to get all the power i could out of the mods i already have. you turn 3 grand with a 4speed auto correct? thanks

August 5th, 2006, 08:19 PM	#6
blackonblack Newbie Join Date: Aug 2006 Posts: 6 iTrader: 0 reviews	I keep hearing everybody say that when the swapped to 3.73's that they wish they had went ahead with the 4.10's. I drive it mostly at night and on the weekends....i dont really have any intention of it being a track beast or anything....i just want people to see the cobra badge and know i mean business... There are so many of the 96-98 cobras that just dont seem like they are as fast as they should be

August 6th, 2006, 12:05 AM	#8
Twist 2 Go Hardcore Enthusiast Join Date: Aug 2005 Location: Chesapeake, Virginia Posts: 1,716 iTrader: 0 reviews	go w/ the 4.10's. It's a Cobra so it likes to rev a little high to keep it on the powerband. A lot of the 4V guys use 4.30's. __________________ 88 Mustang Coupe 2006 FFW Richmond True Street Runner-Up www.rickscarcare.net

August 6th, 2006, 10:25 AM	#9
Casper98GT Hardcore Enthusiast Join Date: Aug 2005 Location: NEW HAMPSHIRE Posts: 2,393 iTrader: 0 reviews	Yeah this is no joke. Im agree'n with Twist. Have any of you recommending 3.73's ever driven a Cobra... or any 32v ford car. They LOVE to be held in the upper rpms. And they just keep pulling and pulling. I say go with 4.10's. They will bring you to the power range so much quicker than a 3.73 will. Also its a 1998 so youre gonna need a new transmission speedo gear for the gear when you put them in. Cant use a elect. programmer for it because our speedo clusters are stupid. 99+ you can. Everyone of my buddys with Mach 1's go with 4.30's. Amazing gear for those 32v's. __________________ 91 LX, 5spd. Ex:Toyota/Ford tech Marine Machinery Technician, Department of Defense.

August 6th, 2006, 10:42 AM	#10
AtlanticBlue99 I Post Entirely Way Too Much 1999 Ford Mustang V6 14.79 @ 92.15 Join Date: Aug 2005 Location: University of Georgia Posts: 8,854 Blog Entries: 1 iTrader: 0 reviews	I've driven a stock cobra, and they do hang up there really good to 7k rpms. If others are doing it no problem, then do it. The steeper the gear, the better __________________ ModdedAutos 1999 Mustang V6 I used to list my mods here but stopped when I exceeded 255 characters.

August 6th, 2006, 12:45 PM	#11
orangeRcode Hardcore Enthusiast 11.21@123 -150 shot Join Date: May 2006 Location: Mustang/Yukon, OK Posts: 1,828 iTrader: 1 reviews	I had a set of FRPP 4.30s but opted for the 4.10s. 4V love rpms. I would not hesitate to put 4.10s in a dd. I only turn 2350 at 70 with 4.10s on my 5 speed but I do have the 3560 tranny which I believe has a different 5th gear ratio. I have a buddy with a 97 Cobra 5 speed. He recently had 3.73s installed and now wishes he would have went with more gear. Not a bad time to upgrade the axles and locker especially if you going to run drag radials or stickies. __________________

August 6th, 2006, 05:45 PM	#12
blackonblack Newbie Join Date: Aug 2006 Posts: 6 iTrader: 0 reviews	I Think ill go with the 4.10's, tuner and speedo gear since you apparently have to have it. does anyone know how hard it is to change out the speedo gear in the tranny? I know they arn't expensive.... steeda makes one for like 15 or so.

August 6th, 2006, 09:47 PM	#13
Casper98GT Hardcore Enthusiast Join Date: Aug 2005 Location: NEW HAMPSHIRE Posts: 2,393 iTrader: 0 reviews	Black.... put the car up and look on the left side of the trans. there will be a black tube sticking out with a white center. remove the 8mm bolt and remove it. then take off the metal clip holding it on and replace it. Thats all. __________________ 91 LX, 5spd. Ex:Toyota/Ford tech Marine Machinery Technician, Department of Defense.

Remove Advertisements Sponsored Links
Ford Mustang Forum Advertisement

Threads Similar to: 4.10 Gear swap in 98 cobra
Thread	Thread Starter	Forum	Replies	Last Post
Spedo gear swap	aj28	V6 Mustangs	2	July 31st, 2007 01:04 AM
Gear Swap on a 98'	Bpuckhead89	V6 Mustangs	1	July 18th, 2007 03:52 PM
3.73 gear swap	droppedbass87	96-98	15	May 19th, 2007 11:08 AM
need help with gear swap to 3.73's	roscoe	5.0 Mustangs	7	April 22nd, 2007 08:20 PM
Rear End Gear Swap Help	streetstang06	General Tech	10	November 27th, 2006 03:46 PM

All times are GMT -4. The time now is 02:01 PM.
Contact Us - Modded Mustangs : Ford Mustang Forums - Privacy Statement - Top
Modded Mustangs is ©2005-2008, All Rights Reserved, And is Not Affiliated with Ford Motor Company. Forum is powered by vBulletin ©2000 - 2012, Jelsoft Ent. Ltd. & SEO by vBSEO 3.3.2 ©2009, Crawlability, Inc.