3:90 Gear
- Thread starter THughes
- Start date
dbtgt
One lucky SOB to own a GT
I would recommend The GT Guy, LLC or Shadowman! You won't be disappointed with either - they're the best!
PL510*Jeff
Well-known member
THughes,
I applaud your decision on the gears - something I will consider as well. Ford had many parameters to balance when building the GT. Knowing that supercars are often (if not inappropriately) measured by their 0-60 performance, Ford opted to make the gearing such that a 1-2 shift was not needed.
I believe a 3.90 gear set will make the car "feel" a lot better for the enthusiast.
I would recommend Stillen to do the work because they have been trained by Ricardo and they have done several already. You can either ship your car to them or, alternatively, you can ship only the transaxle to them if you have a local mechanic that you know and trust.
Please let us know your assessment if you elect to go through with this mod!
I applaud your decision on the gears - something I will consider as well. Ford had many parameters to balance when building the GT. Knowing that supercars are often (if not inappropriately) measured by their 0-60 performance, Ford opted to make the gearing such that a 1-2 shift was not needed.
I believe a 3.90 gear set will make the car "feel" a lot better for the enthusiast.
I would recommend Stillen to do the work because they have been trained by Ricardo and they have done several already. You can either ship your car to them or, alternatively, you can ship only the transaxle to them if you have a local mechanic that you know and trust.
Please let us know your assessment if you elect to go through with this mod!
Thughes,
Please feel free to contact me directly at 888-222-2702 ext. 173 or if you prefer email you can email me at kmillen@stillen.com. When developing the 3.90 gear ratio for the GT Ricardo demanded that we would be the only authorized installer in the world. Our technicians were trained by the guy that engineered and developed the transaxle for these cars.
As nota4re pointed out you can either send us the car or just the transaxle. We have had a few experiences where the car was being worked on by the GT guys or Shadowman and they would just send us the transaxle.
Please feel free to contact me directly at 888-222-2702 ext. 173 or if you prefer email you can email me at kmillen@stillen.com. When developing the 3.90 gear ratio for the GT Ricardo demanded that we would be the only authorized installer in the world. Our technicians were trained by the guy that engineered and developed the transaxle for these cars.
As nota4re pointed out you can either send us the car or just the transaxle. We have had a few experiences where the car was being worked on by the GT guys or Shadowman and they would just send us the transaxle.
Thanks again, we have a standing mile run with the SORC in August. The first time I took the car there it was bone stock and I ran 175 in the mile. This year I had a Whipple on my car and ran 185, I was a little disappointed in the results, I was looking for 190. My run at 185 was in 4th gear, I never shifted to 5th and didn't hit the rev-limiter. I think that the tune on my car is soft, I have the 19 lb. pulley tuned to run on pump gas. I think the the 3:90 would be the ticket to push me over 190. Looks like I need to make a phone call.
Ted
Ted
Shelby#18
GTX1 Owner/Moderator
As a customer with 2 of these in my cars, all I can say is you'll have a huge :biggrin when you hit that pedal!
H
HHGT
Guest
Not to be a downer here, but, with 3:90 gears isn't the Tire/Traction issue exaggerated when launched? Of course with R Tires that will not be the case.
Shelby#18
GTX1 Owner/Moderator
Sam, I've yet to spin the tires on my car. Kip did a mini burn out at the Rally and that's the first time they've spun. My cars have the PS2's on them.
Such a downer....:lol
Such a downer....:lol
From our experience it all depends on how you drive the car. Realistically it's easy to do a nice smokey burn out with the factory 3:3 ratio. With the 3.9 it does become a little bit easier but the car definitely does NOT become a smoke machine in first and second gears. I find the car to be very enjoyable to drive with the 3.9's. Acceleration from a dead stop is very easy, acceleration from a rolling start is much better, now I actually get to shift gears when going for "spirited drives." In my heavily biased opinion, the 3.9 gears are the perfect gearset for these cars.
If our car was still here I'd invite you down to the shop to go for a ride so you could see for yourself how easy it is to drive with the 3.9's. Unfortunately we won't be able to do that since our car is not at the shop anymore.
Since that can't happen, I'd be happy to install the gears in your car and you can see first hand how great the new ratio is...was that subtle enough??? haha.
P.S.- I have sent you a PM regarding a previous conversation we had from awhile ago...
- Aug 25, 2006
- 4,436
Huuum
When initially presented with the 3.90 gear option I was a skeptic however as shared in a post of mine several months ago once I drove a gal with the gears in her I was a believer; so much so that I had them installed in my own gal as well as 4 other customer’s gals.
Then added to the 3.90 gears the AP clutch as developed in concert with Stillen is the perfect addition to the system during this process.
As for the mechanical process of changing the gears; as shared this is completed by Stillen by their factory trained technicians supported with the use of special tools, shims, etc. however I remove the transaxle and deliver it to them for this process.
In fact I removed another transaxle yesterday that is about to be tended to by the team at Stillen.
Takes care
Shadowman
When initially presented with the 3.90 gear option I was a skeptic however as shared in a post of mine several months ago once I drove a gal with the gears in her I was a believer; so much so that I had them installed in my own gal as well as 4 other customer’s gals.
Then added to the 3.90 gears the AP clutch as developed in concert with Stillen is the perfect addition to the system during this process.
As for the mechanical process of changing the gears; as shared this is completed by Stillen by their factory trained technicians supported with the use of special tools, shims, etc. however I remove the transaxle and deliver it to them for this process.
In fact I removed another transaxle yesterday that is about to be tended to by the team at Stillen.
Takes care
Shadowman
Last edited:
tpraceman
THEE GT OWNER
- Aug 25, 2006
- 4,436
Now it will not hurt mine as I will never see a figure to the far side of 220 MPH
IMO it certainly makes driving the gal much more enjoyable
Takes care
Shadowman
Ricardo's theoretical top speed calculations for each gear were:
1st: 53 MPH
2nd: 81 MPH
3rd: 112 MPH
4th: 146 MPH
5th: 180 MPH
6th: 220 MPH
However, I have confirmation from one of our customer's that they have seen speeds in excess of 200 MPH in 5th gear.
TEXAS GT
2006 Twin Turbo
Would this gear set help with the low rpm sluggishness a twin turbo has without robbing too much top speed?
dbtgt
One lucky SOB to own a GT
- Aug 25, 2006
- 4,436
Now you will have to define "without robbing too much top speed"
If you looking for the true maximum top speed then 3.90 gearing will reduce this however if you remain happy with 220-230 top MPH then I would say that you would be very pleased with the altered character of your TT gal with 3.90 gears.
I assisted one of the Forum members with 3.90 gearing in both his Whippled and TT gal and I have heard nothing less than stellar comments.
Call or PM me with any questions
Takes care
Shadowman
H
HHGT
Guest
Thanks Kyle. I'm really considering the 3.90 gears but would like to drive one equipped with a Whipple first. I'll give you a call.