Problems W\96 Cobra

Quick 86 Coupe · 08-27-2000, 10:45 PM

Hey Guys Need Help

My friend has a 96 Cobra the car is stock except for pulleys and h pipe and flowmaster w\ a 3.73 gear

we changed out the 3.73 gear for a set of 4.30 but the problem is that it seems to have made no difference in the car the car does not wind out faster or anything the car feels just like it still has the 3.73 gear in it so we pulled the cover off to make sure the was a 4.30 gear in there and there is we are lost and have no idea why the car is acting like this any help would be greatly appcriated

thanks

------------------
Bobby
86 Mustang Coupe 351c
93 Mustang Convertible
95 Lightning Red #233
Born on 1\3\95
Member of The
NLOC #500
Ford Performance Association

97snakedriver · 08-27-2000, 11:51 PM

Got any track or G-Tech numbers?

cravnpup · 08-28-2000, 08:26 AM

Try the top speed calculator on this website. See what your rpms should be at a certain speed with the 4.30's, then go for a drive and test it out. Then you'll know for sure if you have 4.30's or if it just says so on the gear. If you are indeed running 4.30's it's possible that something is wrong, and you'll have to have it checked out... Otherwise try to get some solid track numbers so you really know if it's faster or not...

------------------
2000 GT Conv. 5speed
Triple Black
Current Mods: K&N, Mobile 1
Upcoming Mods: BBK Longtubes, BBK H-pipe w/cats, MagnaFlow Cat-Back, and much much more

08-28-2000, 01:02 PM

It should be pulling like a madman with the 4.30's, mine is.

Jack the car up from the diff. Get under the car right by the driveshaft. Put a mark at some point on the driveshaft. Have your friend turn the rear wheel one whole revolution while you count how many times the driveshaft turns. If it turns 4.3 times, than you have 4.30's. 3.7 turns would be 3.73's. Get it???

Later, Jason

------------------
1997 Cobra -- #572 of 6,961, White, FMS 4.30's, Steeda Tri-Ax shifter, WMS Velocity Tube, Dynomax Race Magnums, HPM Megabite Jr. Control Arms, HPM Driveshaft Loop, FMS "C" springs, Manual Fan Switch, Autometer Shift-Lite, "REAL" FMS Chrome Cobra R's (street), BFG Drag Radials 275/50/15 (strip)

<A HREF="http://www.mustangworks.com/cgi-bin/ViewIt.cgi?http://www.mustangworks.com/cgi-bin/moi-display.cgi?772" TARGET=_blank>

Click here</A> to see my Cobra!

13.42 @ 107.75 MPH (2.183 60 ft.)

08-27-2000, 10:45 PM	#1
Quick 86 Coupe Registered Member Join Date: Aug 2000 Location: Louisiana Posts: 1	Problems W\96 Cobra Hey Guys Need Help My friend has a 96 Cobra the car is stock except for pulleys and h pipe and flowmaster w\ a 3.73 gear we changed out the 3.73 gear for a set of 4.30 but the problem is that it seems to have made no difference in the car the car does not wind out faster or anything the car feels just like it still has the 3.73 gear in it so we pulled the cover off to make sure the was a 4.30 gear in there and there is we are lost and have no idea why the car is acting like this any help would be greatly appcriated thanks ------------------ Bobby 86 Mustang Coupe 351c 93 Mustang Convertible 95 Lightning Red #233 Born on 1\3\95 Member of The NLOC #500 Ford Performance Association

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08-27-2000, 11:51 PM	#2
97snakedriver Registered Member Join Date: May 1999 Location: Blacksburg, VA Posts: 1,526	Got any track or G-Tech numbers?

08-28-2000, 08:26 AM	#3
cravnpup Registered Member Join Date: Aug 2000 Location: Torrington, CT, USA Posts: 145	Try the top speed calculator on this website. See what your rpms should be at a certain speed with the 4.30's, then go for a drive and test it out. Then you'll know for sure if you have 4.30's or if it just says so on the gear. If you are indeed running 4.30's it's possible that something is wrong, and you'll have to have it checked out... Otherwise try to get some solid track numbers so you really know if it's faster or not... ------------------ 2000 GT Conv. 5speed Triple Black Current Mods: K&N, Mobile 1 Upcoming Mods: BBK Longtubes, BBK H-pipe w/cats, MagnaFlow Cat-Back, and much much more

08-28-2000, 01:02 PM	#4
jmeiers Guest Posts: n/a	It should be pulling like a madman with the 4.30's, mine is. Jack the car up from the diff. Get under the car right by the driveshaft. Put a mark at some point on the driveshaft. Have your friend turn the rear wheel one whole revolution while you count how many times the driveshaft turns. If it turns 4.3 times, than you have 4.30's. 3.7 turns would be 3.73's. Get it??? Later, Jason ------------------ 1997 Cobra -- #572 of 6,961, White, FMS 4.30's, Steeda Tri-Ax shifter, WMS Velocity Tube, Dynomax Race Magnums, HPM Megabite Jr. Control Arms, HPM Driveshaft Loop, FMS "C" springs, Manual Fan Switch, Autometer Shift-Lite, "REAL" FMS Chrome Cobra R's (street), BFG Drag Radials 275/50/15 (strip) <A HREF="http://www.mustangworks.com/cgi-bin/ViewIt.cgi?http://www.mustangworks.com/cgi-bin/moi-display.cgi?772" TARGET=_blank> Click here</A> to see my Cobra! 13.42 @ 107.75 MPH (2.183 60 ft.)