G37S Sedan on 3.916 Gears - OH MY GOD
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Joined: Dec 2010
Posts: 554
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From: Norwalk, CT
ap0c0lypt1c: Wow. I've spent hours reading and searching for bits and pieces of the info you just provided, and could never get full consensus. The threads (as they do) tended to siderail.
For the info and time you spent posting: I offer you a thousand blessings. Or a 1.6 60' time.
Whichever comes first. LOL!
Mad props. I'm searching for diffs this week....
Jim
For the info and time you spent posting: I offer you a thousand blessings. Or a 1.6 60' time.
Whichever comes first. LOL!Mad props. I'm searching for diffs this week....
Jim
Thread Starter
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Joined: Oct 2011
Posts: 127
Likes: 12
From: San Diego, CA
ap0c0lypt1c: Wow. I've spent hours reading and searching for bits and pieces of the info you just provided, and could never get full consensus. The threads (as they do) tended to siderail.
For the info and time you spent posting: I offer you a thousand blessings. Or a 1.6 60' time. Whichever comes first. LOL!
Mad props. I'm searching for diffs this week....
Jim
For the info and time you spent posting: I offer you a thousand blessings. Or a 1.6 60' time.
Whichever comes first. LOL!Mad props. I'm searching for diffs this week....
Jim
My biggest problem I'm having now is that my tires chirp shifting gears ALL THE TIME if I am flooring it or giving it a lot of gas. Thinking of buying some cheap, wide XXR's for now until I can afford legit wheels and having a 255/285 or 245/275 setup.
As far as diffs go, I just bought mine on eBay lol.
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Joined: Dec 2010
Posts: 554
Likes: 56
From: Norwalk, CT
Thread Starter
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Joined: Oct 2011
Posts: 127
Likes: 12
From: San Diego, CA
It may be possible but if I understand correctly there is one diff per axle on the AWD cars. If possible, it would cost twice as much I'd imagine.
I would call a trusted shop and see if they can tell you if this is possible on an AWD car.
I would call a trusted shop and see if they can tell you if this is possible on an AWD car.
Thread Starter
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Joined: Oct 2011
Posts: 127
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From: San Diego, CA
Yep, G35/37 and 350/370z differentials are all the same. If your car came with an LSD diff its a direct bolt on, if you have a non-sport G37 you will need one stub shaft since its a different length on the LSD diff but nothing cost prohibitive when you are getting the entire diff for $150!!! Those are usually $300-500 so I would jump on that!
Yep, G35/37 and 350/370z differentials are all the same. If your car came with an LSD diff its a direct bolt on, if you have a non-sport G37 you will need one stub shaft since its a different length on the LSD diff but nothing cost prohibitive when you are getting the entire diff for $150!!! Those are usually $300-500 so I would jump on that!
Thread Starter
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Joined: Oct 2011
Posts: 127
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From: San Diego, CA
At $150 for a complete diff, I would buy it just to re-sell it for $300 lol. If you're gonna change your gearing anyway in the future, I'd pick that up!
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Joined: Dec 2010
Posts: 554
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From: Norwalk, CT
So I just secured a complete M/T VLSD diff w/ stub axles off of a 2007 G35 coupe with 13k miles from a boneyard here in CT. (I found tons of entries on 'car-parts' .com)
A call to Rich at RDZ Motorsports in Danbury, CT is securing a set of 4.08's and the install kit.
We'll outfit the assembly back here at The Shop in Norwalk.
T-minus ten and counting....
Thanks again for the straight scoop.
Coop
A call to Rich at RDZ Motorsports in Danbury, CT is securing a set of 4.08's and the install kit.
We'll outfit the assembly back here at The Shop in Norwalk.
T-minus ten and counting....
Thanks again for the straight scoop.
Coop
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Joined: Sep 2011
Posts: 678
Likes: 2
From: Burleson, Tx
Usual response style to everyone:
@bluedevils95: I'm still on my 2nd "real" tank of gas since this mod. Currently the computer reads that I have the same expected miles left as any other tank I've driven. On the drive home (3 hrs) from Chatsworth, CA, I determined my highway mileage is only slightly worse (0.5 - 1mpg difference.) So far driving around in the city I can safely say the mpg is no worse than before, perhaps even slightly better. I think driving style and highway time will influence how much this mod impacts your gas mileage.
@Jsolo: for everyone else's reference, here are my approximate RPM's at those speeds:
3.916 gearing 7AT Sedan
60mph - ~2500RPM
70mph - ~2800RPM
80mph - ~3200RPM
@jamesshifflett - They actually asked if I knew you haha
@bluedevils95: I'm still on my 2nd "real" tank of gas since this mod. Currently the computer reads that I have the same expected miles left as any other tank I've driven. On the drive home (3 hrs) from Chatsworth, CA, I determined my highway mileage is only slightly worse (0.5 - 1mpg difference.) So far driving around in the city I can safely say the mpg is no worse than before, perhaps even slightly better. I think driving style and highway time will influence how much this mod impacts your gas mileage.
@Jsolo: for everyone else's reference, here are my approximate RPM's at those speeds:
3.916 gearing 7AT Sedan
60mph - ~2500RPM
70mph - ~2800RPM
80mph - ~3200RPM
@jamesshifflett - They actually asked if I knew you haha
What was done to correct the speedometer after the switch to steeper gears?
If no correction was made for the speedo, you will be showing higher speed and more miles than actual...which affects mpg calculation accuracy.