97 Cobra rear end questions...

True2theHorse · February 1st, 2007, 10:18 PM

Hello everyone, hope all is well. I have a 97 Cobra that I just bought 3.73's for. My question is, does anyone know if the 97 Cobras came from the factory with posi trac? I believe it is LSD (from simply spinning tires), but want to verify as when I open this rear end I want to make sure that I have all the parts I need. I'm pretty sure that if I'm going to go in there I might as well put the posi in there at this time. Also, if not, any recomendations on where to obtain one for a good price?

Any feedback would be greatly appreciated.

Thanks.

Boomer · February 1st, 2007, 10:52 PM

It is a ford traction lock 8.8" rear differential. Have a install kit and make sure to install friction modifier. Depending on who does the install they may know a trick or two to tighten it up a bit. Good price and good parts do not get used in the same sentence..LOL You will find you get what you pay for....

1998_svt_cobra · February 3rd, 2007, 12:49 AM

I just got done installing my 4.10s. Cost me $250 for installation.

Don't try to do it yourself unless your a mechanic. If you don't shim those gears right, your rear end will whine.

True2theHorse · February 4th, 2007, 04:09 PM

Awesome, thanks, also, 1998 cobra, how do you like the 4.10's? I have 3.73's, but I'm certain they will make a difference as do your 4.10's. Besides the general fuel mileage, etc.. etc... what are your thoughts on the 4.10's? Obviously fuel is a moot point to me......if you are driving a performance stang, you shouldn't be worried about burning fuel.

Please let me know your thoughts.

Thanks,

-Andrae

orangeRcode · February 4th, 2007, 11:04 PM

Yes, your 97 Cobra came stock with a 28 spline trac lok. My buddy has one that he had 3.73 installed in. He wishes now he would have gone with 4.10s. Those cars love rpms, 4.30s are not too much gear for them. Don't fear the gear.

1998_svt_cobra · February 5th, 2007, 12:11 AM

I'll say exactly what was said above. People say 4.30s are too much and 4.10s are just right. Personally, I love my 4.10s. I raced a 99 GT a couple months back with the stock gears and beat him by a car length. I raced him with the 4.10s recently and I frickin smoked him. I love the new gears they're great.

As far as gas mileage gos, I lost around 50 miles to a tank; mpg went went from 21-20 to 19 so it wasn't too hard of a hit. Definitely worth every penny and probably the best investment I ever made.

1998_svt_cobra · February 5th, 2007, 12:12 AM

Oh yea, with the 4.30s I've heard that it's too much for a daily drive car, unless you plan on taking the stang to the track alot.

True2theHorse · February 5th, 2007, 09:34 AM

Awesome, thanks guys, that's what I needed to know.

Casper98GT · February 5th, 2007, 11:55 AM

4.10 in a daily driver is perfect. 4.30's are nice a the DOHC cars because they love HIGHER rpms. The cobras and Machs love being up high in the rpm ranges. Do the quicker you get them their the more power you will feel. 4.30's help them jump right up there.

wolffer · February 8th, 2007, 02:41 PM

my 97 cobra with a vortech had 410s in it and kept loosing traction around 5000 rpms in 1,2,and even third gear,373s fixed my traction problem and what use is the power if it doesnt go to the ground.

February 1st, 2007, 10:18 PM	#1
True2theHorse Regular Join Date: Jan 2007 Posts: 67 iTrader: 0 reviews	97 Cobra rear end questions... Hello everyone, hope all is well. I have a 97 Cobra that I just bought 3.73's for. My question is, does anyone know if the 97 Cobras came from the factory with posi trac? I believe it is LSD (from simply spinning tires), but want to verify as when I open this rear end I want to make sure that I have all the parts I need. I'm pretty sure that if I'm going to go in there I might as well put the posi in there at this time. Also, if not, any recomendations on where to obtain one for a good price? Any feedback would be greatly appreciated. Thanks.

February 1st, 2007, 10:52 PM	#2
Boomer Enthusiast Join Date: Oct 2006 Location: warren, Mi Posts: 941 iTrader: 0 reviews	It is a ford traction lock 8.8" rear differential. Have a install kit and make sure to install friction modifier. Depending on who does the install they may know a trick or two to tighten it up a bit. Good price and good parts do not get used in the same sentence..LOL You will find you get what you pay for.... __________________ Just another 10 second Mustang, what did you expect ? http://youtube.com/watch?v=BgykaUrmfvM

February 3rd, 2007, 12:49 AM	#3
1998_svt_cobra Regular 1998 SVT Mustang Cobra Join Date: Nov 2006 Location: Columbus, NE Posts: 274 iTrader: 0 reviews	I just got done installing my 4.10s. Cost me $250 for installation. Don't try to do it yourself unless your a mechanic. If you don't shim those gears right, your rear end will whine. __________________ Kennebell 2.1L Twin Screw soon tooooo cooome! __________________^__________________ IT'S WATCHING YOU VETTE BOY

February 4th, 2007, 11:04 PM	#5
orangeRcode Hardcore Enthusiast 11.21@123 -150 shot Join Date: May 2006 Location: Mustang/Yukon, OK Posts: 1,828 iTrader: 1 reviews	Yes, your 97 Cobra came stock with a 28 spline trac lok. My buddy has one that he had 3.73 installed in. He wishes now he would have gone with 4.10s. Those cars love rpms, 4.30s are not too much gear for them. Don't fear the gear. __________________

February 5th, 2007, 12:11 AM	#6
1998_svt_cobra Regular 1998 SVT Mustang Cobra Join Date: Nov 2006 Location: Columbus, NE Posts: 274 iTrader: 0 reviews	I'll say exactly what was said above. People say 4.30s are too much and 4.10s are just right. Personally, I love my 4.10s. I raced a 99 GT a couple months back with the stock gears and beat him by a car length. I raced him with the 4.10s recently and I frickin smoked him. I love the new gears they're great. As far as gas mileage gos, I lost around 50 miles to a tank; mpg went went from 21-20 to 19 so it wasn't too hard of a hit. Definitely worth every penny and probably the best investment I ever made. __________________ Kennebell 2.1L Twin Screw soon tooooo cooome! __________________^__________________ IT'S WATCHING YOU VETTE BOY

February 4th, 2007, 04:09 PM	#4
True2theHorse Regular Join Date: Jan 2007 Posts: 67 iTrader: 0 reviews	Awesome, thanks, also, 1998 cobra, how do you like the 4.10's? I have 3.73's, but I'm certain they will make a difference as do your 4.10's. Besides the general fuel mileage, etc.. etc... what are your thoughts on the 4.10's? Obviously fuel is a moot point to me......if you are driving a performance stang, you shouldn't be worried about burning fuel. Please let me know your thoughts. Thanks, -Andrae

February 5th, 2007, 12:12 AM	#7
1998_svt_cobra Regular 1998 SVT Mustang Cobra Join Date: Nov 2006 Location: Columbus, NE Posts: 274 iTrader: 0 reviews	Oh yea, with the 4.30s I've heard that it's too much for a daily drive car, unless you plan on taking the stang to the track alot. __________________ Kennebell 2.1L Twin Screw soon tooooo cooome! __________________^__________________ IT'S WATCHING YOU VETTE BOY

February 5th, 2007, 09:34 AM	#8
True2theHorse Regular Join Date: Jan 2007 Posts: 67 iTrader: 0 reviews	Awesome, thanks guys, that's what I needed to know.

February 5th, 2007, 11:55 AM	#9
Casper98GT Hardcore Enthusiast Join Date: Aug 2005 Location: NEW HAMPSHIRE Posts: 2,393 iTrader: 0 reviews	4.10 in a daily driver is perfect. 4.30's are nice a the DOHC cars because they love HIGHER rpms. The cobras and Machs love being up high in the rpm ranges. Do the quicker you get them their the more power you will feel. 4.30's help them jump right up there. __________________ 91 LX, 5spd. Ex:Toyota/Ford tech Marine Machinery Technician, Department of Defense.

February 8th, 2007, 02:41 PM	#10
wolffer Regular Join Date: Aug 2006 Posts: 60 iTrader: 0 reviews	my 97 cobra with a vortech had 410s in it and kept loosing traction around 5000 rpms in 1,2,and even third gear,373s fixed my traction problem and what use is the power if it doesnt go to the ground.

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