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best diff ratio??? also questions on t5 conversion 

 

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 Post subject: Re: What is the best diff ratio???
Posted: Wed Sep 22, 2010 10:08 am 
Getting Side Ways
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if you want something close to the 3.9's behind the auto then maybe 3.23 behind the T5 would be similar (not taking into account of highway rpm's)

from my experience 3.73's behind an EA-EBI T5 was too much and drove like truck

however 3.73's behind an EBII-EL box would be great as they have taller gear ratios. If your running an EA-EBI T5, then 3.45's will be ideal
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 Post subject: Re: What is the best diff ratio???
Posted: Wed Sep 22, 2010 10:15 am 
Getting Side Ways
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Ride: 98 EL Futura

Power: 199 rwkw

Location: Lilydale
VIC, Australia

3.9's an auto sit at 2250-2300 at 100k's with the manual they are around 2500rpm

 

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 Post subject: Re: What is the best diff ratio???
Posted: Wed Sep 22, 2010 6:10 pm 
Getting Side Ways
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Ride: BA XR6T ute

Location: frankston
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FordFairmont wrote:
if you want something close to the 3.9's behind the auto then maybe 3.23 behind the T5 would be similar (not taking into account of highway rpm's)

from my experience 3.73's behind an EA-EBI T5 was too much and drove like truck

however 3.73's behind an EBII-EL box would be great as they have taller gear ratios. If your running an EA-EBI T5, then 3.45's will be ideal



i didnt realise there was a difference in the boxes... goddammit i got an ea box
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 Post subject: Re: What is the best diff ratio???
Posted: Wed Sep 22, 2010 7:05 pm 
Getting Side Ways
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Age: 31

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Ride: BA XR6T ute

Location: frankston
VIC, Australia

maybe i should check on everything else...

i have a box out of ea

i have an ef flywheel and clutch kit

is the bellhousing the same or do i need a different 1??
i also have e-series clutch cable will that work??
and today i got the malwood clutch pedal mod pin will it fit eb pedal box?

if its just the box ill replace it but i kinda wanted to do the conversion on sunday
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 Post subject: Re: best diff ratio??? also questions on t5 conversion
Posted: Wed Sep 22, 2010 8:08 pm 
Getting Side Ways
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Age: 31

Posts: 996

Joined: 9th Aug 2005

Ride: BA XR6T ute

Location: frankston
VIC, Australia

just bought an ed xr6 t5 is that better??

for sale ea t5 lol
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 Post subject: Re: best diff ratio??? also questions on t5 conversion
Posted: Thu Sep 23, 2010 10:27 pm 
Getting Side Ways
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Ride: FG MkII Xr6t Ute

Location: Brisbane
QLD, Australia

The box itself is, better synchro's and tapered roller bearings.

Whether the ratios are is dependant on you.

 

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 Post subject: Re: best diff ratio??? also questions on t5 conversion
Posted: Fri Sep 24, 2010 3:07 pm 
Getting Side Ways
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Ride: EB1 Fairmont Ghia T5 Wagon

Location: Seven Hills, Sydney
NSW, Australia

Is this for your wagon?

If so then only the EF XR had a 3.45 diff and the XR Utes may have them too.

But the centre from the sedans will go in.

The EA box has shorter ratios in 1, 2, 3 and 5 than the ED box.

I have the EA box and a 3.27 LSD in my wagon and I find it to be plenty punchy off the line.

An EA box and 3.27 ends up being the same overall as an ED box and 3.45.

Cheers
BenJ

 

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