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View Full Version : Gears, What to go with?


Smallville
03-18-2007, 09:49 AM
Swapping a T56 into my '99 cobra. I have run 4.10's with the T45 but now having the closer ratios, I am wondering if it is gonna be too much gear. Since the diff is coming out to get resealed and a new pinion flange, I'm pulling out the 3.27s. Deciding whether to go back to the 4.10s or run 3.73s?

ALL YOU TERMINATORS........... Any of you swapped out the 3.55s?
Pure Stock
03-18-2007, 10:35 AM
Swapping a T56 into my '99 cobra. I have run 4.10's with the T45 but now having the closer ratios, I am wondering if it is gonna be too much gear. Since the diff is coming out to get resealed and a new pinion flange, should I be swapping down to 3.73s?

ALL YOU TERMINATORS........... Any of you swapped out the 3.55s?

Keep the 4.10's.
5k#Eaton
03-18-2007, 10:59 AM
Burnouts http://i123.photobucket.com/albums/o317/05Boss281/smilies%20I%20use/burnout.gif
wick
03-18-2007, 11:43 AM
Burnouts http://i123.photobucket.com/albums/o317/05Boss281/smilies%20I%20use/burnout.gif


I know you have another one for burnouts.
INSANELY CRAZY
03-18-2007, 11:43 AM
410's hell yea !!!
GOT SVT
03-18-2007, 12:09 PM
Keep the 4.10's.

agreed
u1arunit
03-18-2007, 01:04 PM
ALL YOU TERMINATORS........... Any of you swapped out the 3.55s?

I went to 4.10's for short time but traction was absolutely non existant at my level of power. I was spinning the drag radials with 16# of air in them from 50+mph rolls. I decided to go back to 3.55's. I do think that 3.73-3.90 is the ideal gear chioce for a Terminator with 500+ RWHP but 3.73's are too close to stock to change and the 3.90 ratio isn't available in Ford gears.
383taman
03-18-2007, 01:33 PM
:iagree: Right fms dont make 390 but us gear or strange makes very good ones.


I went to 4.10's for short time but traction was absolutely non existant at my level of power. I was spinning the drag radials with 16# of air in them from 50+mph rolls. I decided to go back to 3.55's. I do think that 3.73-3.90 is the ideal gear chioce for a Terminator with 500+ RWHP but 3.73's are too close to stock to change and the 3.90 ratio isn't available in Ford gears.
sutyak
03-18-2007, 03:41 PM
Smallvile what kind of power are you at, and are you gearing for general fun or for the track?

I ran a 4.56 in my Mach 1 and LOVED it!

If your Cobra is not supercharged I'd stick with your 4.10.
Of course if you didn't have the 4.10 already I'd go with a 4.30 or 4.56 depending on your rpm going through the traps. :)
Smallville
03-18-2007, 03:58 PM
More into the "fun" factor of it, but I don't want the 3,000+rpm highway cruise. Little track time, moreso when everyone else is there that I have something to run.


Smallvile what kind of power are you at, and are you gearing for general fun or for the track?

I ran a 4.56 in my Mach 1 and LOVED it!

If your Cobra is not supercharged I'd stick with your 4.10.
Of course if you didn't have the 4.10 already I'd go with a 4.30 or 4.56 depending on your rpm going through the traps. :)
Smallville
03-18-2007, 08:23 PM
anymore opinions?
Pure Stock
03-18-2007, 08:24 PM
anymore opinions?

Is this a N/A application? Why would you want less rear gear when switching to a T-56. Isn't the sixth gear O.D. in the T-56 more of an overdrive gear than the T-45's O.D?
Smallville
03-18-2007, 09:55 PM
yes but just barely, T-45 5th gear is .67 where the T56 6th gear is .62
George C
03-18-2007, 09:59 PM
since a T56 is a T56 or very close...think of it like this. my boy's SS runs 456s and only spins 2400rpms around 70mph with 26" tires

for my setup im running 4.88s with 30" tall tire for my t56

so depending on the setup 456 might be somehting for you. and to anyone that says first is nonexistant..well dont listen to htem. in the SS which should have very close ratios as the stang T56 his first is just like others. you can daily this car any time you want or go out and hamer the hell out of it
Smallville
03-18-2007, 10:11 PM
Well yeah, My buddy has a mid '90s TA with 4.10s and at the strip it's ALMOST pointless to use first gear, but around town it is kinda fun. his cruising rpm is up there though, around 2700 at 75,with stock tires. I KNOW the ratios are different, through tremec themselves. Chevies use a lower first gear than the ford and 6th is slightly lower but like .02 or something miniscule like that. But seems most are hinting towards going back to 4.10s.

burnouts and more burnouts I guess!!!:pepper:
George C
03-18-2007, 10:24 PM
Well yeah, My buddy has a mid '90s TA with 4.10s and at the strip it's ALMOST pointless to use first gear, but around town it is kinda fun. his cruising rpm is up there though, around 2700 at 75,with stock tires. I KNOW the ratios are different, through tremec themselves. Chevies use a lower first gear than the ford and 6th is slightly lower but like .02 or something miniscule like that. But seems most are hinting towards going back to 4.10s.

burnouts and more burnouts I guess!!!:pepper:

almost pointless? damm low reving motors, i guess i forgot to mention this SS is setup to shift around 7200 [244/248 608/612 110 cam specs]
Smallville
03-18-2007, 10:42 PM
almost pointless as in the lack of traction.
George C
03-18-2007, 11:02 PM
almost pointless as in the lack of traction.

lack of traction is no suspension or proper tire...get good tires and feel the benefit of gears
Pure Stock
03-18-2007, 11:08 PM
Amen to that brother.
somethingclever
03-19-2007, 08:28 AM
4.10's
Viper_ed
03-19-2007, 08:55 AM
4.10's

:yes:
George C
03-19-2007, 10:49 AM
dont fear the gear!!!! Thats why they gave the t56 2 overdrives
One Sweet Day
03-19-2007, 11:08 AM
Keep the 4.10's.


410's hell yea !!!


agreed


4.10's


:yes:

http://sl.glitter-graphics.net/pub/25/25152ty9ebbwsu2.gifsounds like everyone pretty much agrees....
scott5
03-19-2007, 11:09 AM
yea 4.10s
Rodeheaver's
03-19-2007, 12:04 PM
3.73 ftw, you want to keep it in 3rd gear through the traps...
FineLineMtrSprt
03-19-2007, 12:44 PM
My buddy runs 4.10's in his 96 GT Saleen replica with a 10lb blower and a T56 swap....and they dont rev nearly as well at Cobras as well all know....i would keep the 4.10's
Sonic03snake
03-19-2007, 01:14 PM
4.10 here, they work perfect at the track with a 28" tire.
Smallville
03-19-2007, 05:33 PM
THANX all, guess I'll be putting the 4.10's back in. Anyone need a BRAND NEW set of Ford Motorsport 3.73s :rotflol::rofl::rotflol:
George C
03-19-2007, 10:59 PM
just remember you want ot be in 1:1 crossign traps nothign higher or lower!!!

true thing to do is match your peak power [rpm] with what gear will put you at with the right mph
George C
03-19-2007, 11:00 PM
3.73 ftw, you want to keep it in 3rd gear through the traps...

since when do you want to be in 3rd with any manual? always want to be 1:1 ratio
Pure Stock
03-19-2007, 11:09 PM
since when do you want to be in 3rd with any manual? always want to be 1:1 ratio

When your piloting a Stock 86 GT with 2.73 cogs with a 26" tall tire. ;)
George C
03-19-2007, 11:56 PM
When your piloting a Stock 86 GT with 2.73 cogs with a 26" tall tire. ;)

in that case you got a point. i know a buddy had a s10 with a t56 adn 273. he shifted once lol
Rodeheaver's
03-22-2007, 09:54 AM
don't know about you, but i want to shift no more than 2 times, the more you shift the more time you waste, you need to be at max rpm when trapping. and with a 28" tire then 4:10s might be good, but i usually use 26" tires on a fox so i like the 3:73s.