7AT 3.692 Gear Review

Felix 808 · 11-28-2013, 12:49 PM

Quote:

Originally Posted by critical

the 3.692 final drive gear with the auto transmission is comparable to a manual with the 4.08 final drive gear. Actually i'm geared higher, minus 5th gear.

Actually you are geared lower. Higher Ratio #'s = lower gears. Pinion gear gets smaller on numerically higher gear sets

Quote:

Originally Posted by critical

not much to say here other than it's awesome. Have a 3.692 final drive gear and a quaife differential and it accelerates so nicely. Car is always in the power band it seems and is much more pleasant to drive around. Fuel consumption is not really affected. I averaged 24 ish on a road trip with some pretty fast driving. In 7th gear i'm at around 3k rpm's at 80mph.

I'm glad I re-read this post, as I was looking into 3.9's for my auto as 4.08's would be too deep for me. After recalculating, there is only 4% difference between the 3.692 & the 3.9's. For the added cost I'm going to go with the 3.692's as they will already be in the low mileage diff I just bought Thanks for saving me a grip of cash

Quote:

Originally Posted by critical

Only negative is that cruise control does not work now. Actually it works intermittently.
The 3.692 final drive gear with the auto transmission is comparable to a manual with the 4.08 final drive gear. Actually I'm geared higher, minus 5th gear.

Does anyone have a clear understanding on how the cruise control works in the 370z? Where is it sensing it's reading from? Also is there any speedo/ Odo correction available/ needed?

Thanks again

critical · 11-28-2013, 02:40 PM

Quote:

Originally Posted by Felix 808

Actually you are geared lower. Higher Ratio #'s = lower gears. Pinion gear gets smaller on numerically higher gear sets

I'm glad I re-read this post, as I was looking into 3.9's for my auto as 4.08's would be too deep for me. After recalculating, there is only 4% difference between the 3.692 & the 3.9's. For the added cost I'm going to go with the 3.692's as they will already be in the low mileage diff I just bought Thanks for saving me a grip of cash

Does anyone have a clear understanding on how the cruise control works in the 370z? Where is it sensing it's reading from? Also is there any speedo/ Odo correction available/ needed?

Thanks again

it messes with the cruise control logic. the specifics are on the forum somewhere and possibly in the service manual as well.

blueranger · 01-19-2014, 08:12 PM

Anyone know other sources besides eBay for a used manual rear diff?

I have been looking for a couple of months on eBay with no luck

01-19-2014, 08:12 PM	#3 (permalink)
blueranger Track Member Join Date: Aug 2012 Location: Albuquerque NM Posts: 577 Drives: 2010 Roadster 7AT Rep Power: 309	Anyone know other sources besides eBay for a used manual rear diff? I have been looking for a couple of months on eBay with no luck __________________ F.I. Stage 1 Twin Turbo #48 \| E85 FlexFuel \| Built 7AT \| F.I. 34 Row Oil Cooler \| F.I. Flex Plate \| F.I. 19 row Trans Cooler \| MT ET Street S/S \| ECUTEK Tuned by Seb \| RPM Roll Bar

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