3.9 final drive - Page 7 - G35Driver - Infiniti G35 & G37 Forum Discussion

#91

05-31-2006 | 09:59 PM

99atlantic

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Joined: Jan 2003

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Quote:

Originally Posted by jtesensky

Is a 4.10 gear too short for the G35, any thoughts? I am in the process of installing the 3.91 on my 5AT coupe. We want to see how the car behaves before we have our own custom gears made. If we feel that there is "room" for a 4.10 gear in the rear end we might go that route. We are looking for function just as much as we are looking for performance. Due to manufacturer demand we can only go with one type of gear, otherwise we would try & do a 3.91 & a 4.10. We are still pondering the option between the two...

hell, i was disappointed with 4.10s....if i ever do gearing again, it's atleast 4.56s for me.

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#92

11-01-2013 | 09:34 AM

nitrorc

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Joined: Oct 2013

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From: baltimore,md

so let me ask you guys this..i have a 05 5at with 3.3..if I was to swap to 3.69 gears and loose some top end if I was to add breathing mods,would that help restore some top end????

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#93

11-03-2013 | 06:05 PM

herrschaft

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From: Coast

Quote:

Originally Posted by nitrorc

so let me ask you guys this..i have a 05 5at with 3.3..if I was to swap to 3.69 gears and loose some top end if I was to add breathing mods,would that help restore some top end????

You don't lose or gain power with FD gearing, you change the top speed of the car.

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#94

11-04-2013 | 11:53 AM

Stillen06coupe

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Joined: Jul 2013

Posts: 377

Likes: 22

From: York, PA

The higher the ratio, quicker accel with less top speed. And vice versa. The biggest downfall with putting higher ratio rear in is the mpg loss. But to some that doesn't matter. I was thinking of doing this mod myself but I do a lot of "city" driving so I'd probably get 16mpg or worse after this mod. If I decide to keep my cat and get a tune instead of getting a g37, I might still do it. My mpg is down right now cuz I need a tune

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#95

01-19-2016 | 05:59 PM

Kaddo

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Joined: Jan 2016

Posts: 4

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If you do mostly city driving the 3.7 or 3.9 would actually be a small advantage because of the ability to move the car easier. The place you will notice your mpg suffer most is freeway driving at higher speeds. At normal cruising speeds there probably would be minimal drop in fuel consumption.

My apologies, didn't realize this was a 2 year old thread when i replied.

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