: Rear End gears?



jerrycecco
03-12-09, 06:10 PM
Has anyone changed their rear end swapped out their 3.73 to 4.11 or 4.30??

comments?
suggestions?
problems?

--jerry

trukk
03-12-09, 06:41 PM
A few have gone the oposite was down to 3.42's, and a few have done 4.10's. Think the guys that have gone up all have aftermarket diffs though (ford 9", madman, Kars Traction Pak). I'm not aware of any higher ratios available for the OEM diff.

-Chris

ctsv154
03-12-09, 06:59 PM
A higher ratio is a lower number. The STS-V has higher gearing (3.23's) and uses the same diff. There was somebody on here trying to sell some GM CTS-VR 4.10s for like 2k

trukk
03-12-09, 07:33 PM
A higher ratio is a lower number. The STS-V has higher gearing (3.23's) and uses the same diff. There was somebody on here trying to sell some GM CTS-VR 4.10s for like 2k

Thaks for the clarification, reverse what I said above :D

-Chris

Scatillac
03-13-09, 12:31 PM
For me, a 4.10 gear would make a short low gear even shorter, too much so. If we had the MM6 (2.66 1st/.50 6th) gearset in our transmissions, it would be a similar to the M12 ratios in 1st and 6th, but with a better gear spread in between (especially for stock displacement cammed-up motors).

IMHO, the best combo for a large displacement car, would the the MM6 transmission gearing with the Sky/Solstice 3.91 rear gear. Adequate acceleration and a truly eye-watering top end!

jerrycecco
03-13-09, 01:44 PM
from Luke:
"Looks like the highest one available is a 3.91. it is from a CTS with a 2.6
89048143 and it is $430.06 plus $10.00 shipping"

Doctornick
03-13-09, 02:15 PM
Might want to get it cryo treated before you drop it in. Going with a 3.91 would make this car very interesting on the topend. What would the top of 4th put you at?

NormV
03-13-09, 02:42 PM
I've got 3.42 and still skipping along with 1-3-5. :)


Norm

Scatillac
03-14-09, 12:20 PM
With the MM6 (Corvette) gearset and a 3.91 rear gear, 134 in 4th @ 6600 and 181 in 5th @ 6600. Since 6th is a .50 ratio it would probably be difficult to pull with any success.

With the M12 (stock) gearset and a 3.91 rear gear, 134 in 4th @ 6600 and 167 in 5th @ 6600 and if the motor would pull it, 216 in 6th @ 6600 :bonkers:.

ctsv154
03-14-09, 12:37 PM
hmmm How much hp would it take to brake 200mph in a V1? I'm not sure but I'll let you guys now how 373's and 600hp do! I have a couple cell phone videos of stock 163mph runs.

UnsafeAtAnySpd
03-15-09, 09:58 AM
hmmm How much hp would it take to brake 200mph in a V1? I'm not sure but I'll let you guys now how 373's and 600hp do! I have a couple cell phone videos of stock 163mph runs.

Go pull on some V2s and get it on video. :)

ctsv154
03-15-09, 10:58 AM
If I could find any around OK I would. About the fastest thing I have seen around here is a C6 Z06 and those are RARE!

UnsafeAtAnySpd
03-15-09, 11:06 AM
I've been suprised what I've seen around Wyoming since I moved here. Granted they were probably just passing through though. A few C6 Z06s. I saw my first GTR (on the road) the other day (it was pulled over btw :) ). Also a month or two back, coming back from alert in the middle of nowhere Wyoming in January, here comes a F430. It was a wtf moment.

ctsv154
03-15-09, 11:51 AM
I did is one GTR about a month ago but he has going the opposite direction. Why is it all the bad ass cars are going the wrong way!?!?

UnsafeAtAnySpd
03-15-09, 12:03 PM
Yeah, so was the one I saw. Granted I was driving a government vehicle at the time so it wouldn't've made a lot of difference anyway.

rjoffe
03-15-09, 12:11 PM
I was side by side with a GT-R for about 2 miles on the outer capital beltway, although I believe max speed never exceeded 20 MPH the whole time !!

UnsafeAtAnySpd
03-15-09, 12:19 PM
I was side by side with a GT-R for about 2 miles on the outer capital beltway, although I believe max speed never exceeded 20 MPH the whole time !!

Did you win? :)

rjoffe
03-15-09, 01:38 PM
stuck in traffic, I think neither one of us "won", but I did get a good look at his car.

atdeneve
03-15-09, 02:06 PM
Did you roll up beside him, roll down your window, and make barum-barum-brrrr barum-barum-bur-bur-brrr vvvvrooooom sounds, in exchange to which he looked at you a bit oddly?

If so, you win! You are a winner!

rjoffe
03-15-09, 02:17 PM
He definitely acknowledged me, and yes, we both did a bit for engine revving :D

atdeneve
03-15-09, 02:54 PM
I meant with your lips. You were supposed to make those sounds with your lips. With your gaze fixed squarely on him.