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3.45 to 3.7?????????????????????? 

 

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 Post subject: 3.45 to 3.7??????????????????????
Posted: Sat Nov 15, 2008 10:14 am 
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Ok im up for a new diff, so I was thinking of getting higher gears while im at it..
Could anyone tell me if it would be worth it, and what difference I will make out of it?

Thanks

-Liam

 

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Posted: Sat Nov 15, 2008 11:03 am 
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manual or auto?
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Posted: Sat Nov 15, 2008 11:05 am 
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if you want a noticeable diffrence go the 4.11
anyone whos been in a falcon with 4.11's will no its well worth the money

 

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Posted: Sat Nov 15, 2008 11:24 am 
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I hear manuals dont mix with 4.11s well due to 1st gear being to short

 

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Posted: Sat Nov 15, 2008 6:12 pm 
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If its manaul go 3.73

If its auto go 4.11

 

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Posted: Mon Nov 17, 2008 10:29 pm 
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Ok i have 3.73 ration in my manual and to be honest i wish i went 3.90 or 4.11 for the drags but 3.73 is totaly streetable not a huge change from 3.45. Also if you don't have a set of 3.73 diff gears you might just get a shock at the price of them, i paid $600 just for the crown and pinion that was brand new. they are hard to find second hand let alone in good condition. Mall Wood recommended i put 3.90 gears in and he was right i should have. definately better than the 3.45 ration though

 

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Last edited by xr6eat 50 on Mon Nov 17, 2008 10:33 pm, edited 1 time in total.

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Posted: Mon Nov 17, 2008 10:31 pm 
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o i have a xr6 too i only mention this because of the gearbox ratios, they are different to a standard falcon t5

 

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Posted: Tue Nov 18, 2008 4:13 pm 
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Oh yeh sorry, it's manual.

What would 3.90 be like for daily driving though...

And more feedback from people with 3.73 would be grouse lol


Thanks

 

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Posted: Tue Nov 18, 2008 4:19 pm 
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Like would there be a noticable speed difference?? Let me know before i blow my money please loL!

 

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Posted: Tue Nov 18, 2008 4:48 pm 
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to be honest, theres alot of people running healthy times down the 1/4 mile with manual & 3.45 gears, probably moreso than with 3.7's and shorter.

but it feels nicer to drive with 3.73's

and defintely dont put 3.9's in there as you will probably go slower lol.....
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Posted: Tue Nov 18, 2008 4:50 pm 
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xr6eat 50 wrote:
o i have a xr6 too i only mention this because of the gearbox ratios, they are different to a standard falcon t5


as far as i know the ratios are the same as any EBII onwards T5
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Posted: Tue Nov 18, 2008 9:14 pm 
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3.73 is about max with a manual, if u went much higher you would be going slower i would think.

 

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Posted: Tue Nov 18, 2008 9:17 pm 
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FordFairmont wrote:
xr6eat 50 wrote:
o i have a xr6 too i only mention this because of the gearbox ratios, they are different to a standard falcon t5


as far as i know the ratios are the same as any EBII onwards T5
No the t5 in the no xr6 models have
1st 3.23
2nd 1.99
3rd 1.29
4th 1.00
5th 0.72 - -
Reverse 3.15
These are the same rations used in the xr8 t5

where xr6 t5 has
1st 2.95
2nd 1.95
3rd 1.34
4th 1.00
5th 0.73
Reverse 2.76

don't really know if this will make a noticable differenc or not.

As for 3.73 They got me .1 of a second off my 60Ft and .2 off my 1/4 mile et. They are good fun on the street when i lined up a car that i used to be dead even with i slowly pulled away from it. From memory the diffence in the RPm was roughly 200 rpm eg 100kph with 3.45 was 2200 rpm with the 3.73 it is 2400rpm. Not a huge change.

 

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Last edited by xr6eat 50 on Tue Nov 18, 2008 9:23 pm, edited 1 time in total.

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Posted: Tue Nov 18, 2008 9:21 pm 
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one other thing to note is that if you go to 3.90 or 4.11 you can not get a speedo gear,that i am aware of, but you can get one for 3.73. All this means is that if you go with the 3.73 you will save your self the expense of putting in a speedo correction box which usually costs about $200. The speedo gear you want for 3.73 is white in colour.

 

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Posted: Tue Nov 18, 2008 9:44 pm 
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where did you get this gear from?.... was it modified to fit?
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