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04-09-2013, 10:12 PM
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Walking with God
Join Date: Mar 2005
Location: Melbourne
Posts: 7,321
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Hi All,
Anyone running 3.7 gears? If so, what are your experiences with such a setup? I'm thinking of putting 3.7 gears in the auto wagon. The gears are currently in my SR manual, and in that setup, I always felt it was just that bit too low geared in first. How does 3.7 go with the BTR auto? I was wondering if it'd be geared too low. Also, what revs would the car be doing at 100kmph roughly? GK
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2009 Mondeo Zetec TDCi - Moondust Silver 2015 Kia Sorento Platinum - Snow White Pearl 2001 Ducati Monster 900Sie - Red Now gone! 1999 AU1 Futura Wagon - Sparkling Burgundy On LPG Want a Full Life? John 10:10 |
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04-09-2013, 11:49 PM
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FF.Com.Au Hardcore
Join Date: Sep 2006
Posts: 721
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Cant give you personal experience on them, but i bought 3.89's (havent put them in), and i was tossing up between them and 4.11's which everyone seemed to recommend aswell, dunno if 3.7's will be very noticable in the auto...
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05-09-2013, 06:28 AM
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RIP...
Join Date: Dec 2004
Posts: 15,524
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I've also used 3.7's in a manual, which I felt was great.
1st gear on the AU autos is very very tall, so I reckon 3.7's might just begin to feel ok. 4th's is also pretty tall, so I think 3.7's might just be a good compromise.
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. Oval Everywhere... |
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05-09-2013, 04:45 PM
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#4 | ||
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Peter Car
Join Date: Dec 2004
Location: geelong
Posts: 23,145
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I've got a set of 3.7's that are waiting to go in. I thought 3.9's might start to be getting a little low so thought 3.7's would be a good compromise, as I do a bit of highway driving. 4 speed BTR.
Anything will be an improvement over 3.23's. |
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06-09-2013, 01:16 AM
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Banned
Join Date: Aug 2013
Posts: 31
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It would fly with that ratio
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06-09-2013, 07:48 PM
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#6 | ||
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Sick Puppy
Join Date: Jul 2006
Posts: 1,963
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Will be good. I went to 3.9's in my 5.0 5 speed ute and its great.
Heaps of grunt off the mark and really tractable around town. As an idea in 5th at 110km I am sitting at 2500 RPM. First gear is a little short but since the motor is always on the torque curve my fuel economy improved. |
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08-09-2013, 12:59 AM
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#7 | ||
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FF.Com.Au Hardcore
Join Date: Feb 2005
Location: Melb north
Posts: 12,025
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3.7s are not all that far away from the standard xr6 3.45 ratio, personally i think 3.7s would be alright( i would put that ratio in without hesitation), as the xr6 goes well but 1st gear in the btr still feels a tad tall on the take off even with the 3.45, on the highway i don't know the exact difference in rpm, i don't think it would to hard to bear going from 3.23 to 3.7.......
and i have often thought, while you might loose a very tiny bit of economy on the highway, i reckon you might actually pick it up in the burbs with the 3.7 diff(just a theory). |
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08-09-2013, 06:12 PM
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#8 | ||
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Walking with God
Join Date: Mar 2005
Location: Melbourne
Posts: 7,321
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Thanks for all the input guys!
GK
__________________
2009 Mondeo Zetec TDCi - Moondust Silver 2015 Kia Sorento Platinum - Snow White Pearl 2001 Ducati Monster 900Sie - Red Now gone! 1999 AU1 Futura Wagon - Sparkling Burgundy On LPG Want a Full Life? John 10:10 |
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08-09-2013, 09:02 PM
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#9 | ||
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FG XR50 TURBO
 
Join Date: Apr 2009
Location: reservoir
Posts: 4,557
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i was going put 3.45 lsd in my au ghia but now i'm going to with the 3.7 gears, with the mods i'm doing with it [220kw headers & hi flow cats, 1.7 R/R ] should work out alright, i just want the lazy AU 5ltr to have more get up n go. cheers dean
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10-09-2013, 09:04 AM
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#10 | ||
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FF.Com.Au Hardcore
Join Date: Jun 2006
Location: Victoria
Posts: 1,138
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Just a quick question that is kinda off topic:
I have a '99 Fairmont v8 wagon with a LSD, can anyone tell me the ratio please? Thanks
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Who cares how it looks, power is everything. Looks are for metrosexuals..... |
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10-09-2013, 09:18 AM
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#11 | ||
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FG XR50 TURBO
Join Date: Apr 2009
Location: reservoir
Posts: 4,557
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the info might be in here, but i think you'll have the 3.23 ratio
http://www.fordforums.com.au/showthr...=au+diff+topic |
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10-09-2013, 03:39 PM
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#12 | ||
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FF.Com.Au Hardcore
Join Date: Jun 2006
Location: Victoria
Posts: 1,138
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Thats my guess too mate.
I putting my old head under the wagon on the weekend, only to find that the sticker is totally faded and unreadable, it does have the LSD tag on the centre tho...
__________________
Who cares how it looks, power is everything. Looks are for metrosexuals..... |
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Who's running 3.7 diff gears?
Re: Who's running 3.7 diff gears?
Re: Who's running 3.7 diff gears?
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