Have 3:42 gears thinking of going to 3:90 need imput?
11 Second Club
Joined: Jun 2005
Posts: 1,537
Likes: 0
From: Was New Orleans, but swam to Baton Rouge
YOU SHOULD WAIT ON THE GEARS UNTIL YOU GET THE CLUTCH>... Save money on isntall...
I am pretty sure.... For the gears they have to drop the whole tq tube assembly and will have to do it all over again for the clutch.... Might save you some money to do it all at once with the car already apart. (-:
I am pretty sure.... For the gears they have to drop the whole tq tube assembly and will have to do it all over again for the clutch.... Might save you some money to do it all at once with the car already apart. (-:
^ That is true, but if I went that far I would change the clutch, since all that would be left is un-bolting the torque tube from the bell housing. I just repaired my tranny (broke the main output shaft) and put everything back together without changing the clutch and now my clutch is slipping go figure 
Oh well at least we did all the work ourselves.
Oh well at least we did all the work ourselves. 
Thread Starter
Launching!
Joined: Feb 2005
Posts: 228
Likes: 0
From: Central California
Well keep us posted. I will have to go to LB one of these days and meet up with you. Well once I get it up and running again 
Lol, my clutch is slipping pretty bad so I ordered a Mcleod Twin Disk, so in a couple weeks when it comes in it will be back on the road, so in the meantime I have to drive the Z06 (LOL)
Lol, my clutch is slipping pretty bad so I ordered a Mcleod Twin Disk, so in a couple weeks when it comes in it will be back on the road, so in the meantime I have to drive the Z06 (LOL)
Last edited by 99FRCTorchRed; Dec 5, 2007 at 09:48 PM.
Thread Starter
Launching!
Joined: Feb 2005
Posts: 228
Likes: 0
From: Central California
Good choice I went to a 3.90 a few months ago and definately think any one should do it. Unless over like 700 whp!
I have 2 in car videos below before and after they are not exactly from the same start and stop points but you kind of get the idea
3.42 30-105 run
http://videos.streetfire.net/video/9...a2013d33b9.htm
3.90 20-130 run
http://videos.streetfire.net/video/a...e001607f98.htm
I have 2 in car videos below before and after they are not exactly from the same start and stop points but you kind of get the idea
3.42 30-105 run
http://videos.streetfire.net/video/9...a2013d33b9.htm
3.90 20-130 run
http://videos.streetfire.net/video/a...e001607f98.htm
I went from the 3.42's to a DTE 3.90 diff and was really liking it until it lost a tooth off the ring gear and took out my trans output shaft in the process, (on the road course if you can believe that). I went to a 3.73 gear and stage 5 parts after that debacle and feel that the Zo6 should have come from the factory with the 3.73's. It is a beast at the drag strip, and really kicks butt on the street and the road course while still getting great gas mileage on trips. With the gearing in the Z06 trans, the 3.90's were a bit much on the street and the drag strip and caused a bit more wheelspin than I wanted in the lower gears. I feel the 3.73's are a perfect fit for a multiple duty car at my power level. HTH,,,,,,,
Jimbo
Jimbo
Staging Lane
Joined: Oct 2007
Posts: 77
Likes: 0
From: Toronto, Canada
I am also thinking of doing a Dynotech rear end change to the 3.90 with my 99 M6.
If that 3.90 rear gearing and T-56 trans gives you the same effect as a Z06 then that
should do the trick. Guess it would feel like the car has 100 more hp.
My Caddy CTS-V has the LS6 and the 3.73 rear end and its hard to hook with the smaller
245 wide tires, just shreads them, need to upgrade the rears to 275/35/18's in the spring.
I would like to put the cars head to head and see how they stack up.
If that 3.90 rear gearing and T-56 trans gives you the same effect as a Z06 then that
should do the trick. Guess it would feel like the car has 100 more hp.
My Caddy CTS-V has the LS6 and the 3.73 rear end and its hard to hook with the smaller
245 wide tires, just shreads them, need to upgrade the rears to 275/35/18's in the spring.
I would like to put the cars head to head and see how they stack up.
3.90s are great. I think a regular M6 with 3.90s is better than the Z51 (Z06) with the stock rear. 4th gear ratio is a closer spaced to 3rd and 5th isn't as much of an overdrive either. Here's what the equivalent gearing looks like:
Z06... Stock with 3.90s
2.97... 3.03
2.07... 2.03
1.43... 1.48
1.00... 1.14
0.71... 0.84
0.57... 0.57
Z06... Stock with 3.90s
2.97... 3.03
2.07... 2.03
1.43... 1.48
1.00... 1.14
0.71... 0.84
0.57... 0.57
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Verdad Gallardo Thread Starter
Launching!
Joined: Feb 2005
Posts: 228
Likes: 0
From: Central California
Thanks Rick and Andrew you guys did a awesome job on my car today. Love the 3.90's and Rick also did a quick tune on my car. On the way home I still got over 30 miles per gallon.........Can not beat that.........
Synergy Motorsports real good people that make you feel at home.
Thanks Again
Mike
Synergy Motorsports real good people that make you feel at home.
Thanks Again
Mike
Thread Starter
Launching!
Joined: Feb 2005
Posts: 228
Likes: 0
From: Central California
Well... I got my car back from Cartek and all I have to say is that the gears (4.10's) are awsome! I put my CCWs on that alow me to run a 325-30-19 in the rear and once the tires are warm... traction isnt a problem for me. I made 453 rwhp and 400 ft lb tq with the work that Cartek did and the car is unbelievable now! GO 4.10s!!!!!
Thread Starter
Launching!
Joined: Feb 2005
Posts: 228
Likes: 0
From: Central California
Well... I got my car back from Cartek and all I have to say is that the gears (4.10's) are awsome! I put my CCWs on that alow me to run a 325-30-19 in the rear and once the tires are warm... traction isnt a problem for me. I made 453 rwhp and 400 ft lb tq with the work that Cartek did and the car is unbelievable now! GO 4.10s!!!!!
