4.10's installed!!!!!!!!
- Thread starter tucker-tx
- Start date
jrc_03_gt said:
He is ok! I tack 3000 RPM'S @ 90MPH on a 2003 gt with a 3650 trany.
Thanks,
I thought I had seen a previous post you had made, mentioning the 3000 RPM at 90 MPH. That is one reason I actually went ahead and went with the 4.10s instead of 3.73s. So while driving tonight hitting just under 2700 @ 80 didn't seem bad at all. Whatever. Your reassurance has helped. Thanks..
jrc_03_gt said:Are you at 3000 RPM'S @ 90 MPH?
Haven't hit 90 yet, got arrested last week. Trying to play it safe for now, speed limit here on the freeway is between 60 and 65 depending on where you are. I do think @ 90 I would be right at 3000 or just a notch above.
Go HoTO!
New Member
tucker-tx said:
That is the fastest gear swap I have ever heard of. Even the fast guys need 3.5 to 4 hours!
cold96snake
20+ Year Stangneter 
YardSpecial
New Member
Still scared to try that gear with my 02 Auto.
Was thinking 3.55 for more top speed.
If you go here:
http://www.wcfords.com/stuff/calcs/EGTcalc/egtcalc.php
4.10 put you at 100 in third !! Not good at the track.
Auto, 275/40R17 tires
Was thinking 3.55 for more top speed.
If you go here:
http://www.wcfords.com/stuff/calcs/EGTcalc/egtcalc.php
4.10 put you at 100 in third !! Not good at the track.
Auto, 275/40R17 tires
Steve777
New Member
my 4.10s just arrived today ...can't wait to get them in ..but i've been getting *****ty estimates ....around 400 bucks for the install ....i need to look around more and find somewhere cheaper - but my patience is low ...i want them in now!
twogts4us
15 Year Member
Cavallo said:
What kind of top speed are you aiming for and where do you plan to use this top speed?
4.10 and 100 MPH in 3rd - hey, sounds good to me...Yep, if all goes well you'd like to be in 4th for just the last bit of the 1320.
menasci said:
not quite.
typical 4.10 gear GT runs about 111mph at 6000 rpm in 4th
4th is 1:1 ratio, so both trans are identical rpm's at this point
t-45 @ 6000 x .68 = 4080rpm at the same speed in 5th
t-3650 @ 6000 x .62 = 3720rpm at same speed in 5th
over 300 rpm difference shifting from 4th to 5th is NOT identical.
Nuar said:Off topic a little bit.
Where is a good place to get the gears for as cheap as possible?
I wanted to get them for a while now, and this thread just convinced me to get 4.10s instead of the 3.73s
Check this site ---> https://fordparts.com/index.php
They have pretty good prices.
They either put 3.73's in or your speed cal is off because I am right at 2900 rpm at 80. I have checked various times because I hate it, I had Tim fix my speedo when I got my dyno tune and I have also been clocked by radar at 60, 70, 80 mph and the speed I was doing was what the radar read also. The radar was calibrated and correct.
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