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Best Diff ratio?? 

 

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 Post subject: Re: Best Diff ratio??
Posted: Thu Aug 04, 2011 2:41 pm 
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67RCE wrote:
facer01 wrote:
have decided on 3.9s or 3.7s what cars should I be able to get them from

R31 Skyline or Pintara. Stock up on earplugs though. Mal Wood sell bra new gears to suit the Falcon diff if you are willing to spend the money.

they make alot of noise do they?
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 Post subject: Re: Best Diff ratio??
Posted: Thu Aug 04, 2011 2:44 pm 
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mine don't make any noise, they are out of a R31 Skyline. Its probably just luck if you get one that's noisy or not.

 

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 Post subject: Re: Best Diff ratio??
Posted: Thu Aug 04, 2011 2:54 pm 
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fair enough aye will hopefully pick some up some where
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 Post subject: Re: Best Diff ratio??
Posted: Thu Aug 04, 2011 2:55 pm 
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DRHEMI wrote:
67RCE wrote:
......................... Mal Wood sell bra new gears to suit the Falcon diff if you are willing to spend the money.
Around the $650 mark i was quoted for a brand new set...........
Apparently "Strange" make then for Borg Warners

Just for the gears that figures pretty much spot on. The gears are either Strange or Richmond IIRC. but my comment was at the typical cheapskate e series owner. I had to leave it open as the OP may be willing to spend the money on new gears.

 

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 Post subject: Re: Best Diff ratio??
Posted: Thu Aug 04, 2011 7:56 pm 
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 Post subject: Re: Best Diff ratio??
Posted: Thu Aug 04, 2011 8:19 pm 
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thanks heaps forthat swc, but if I buy one of those and want an lsd ill have to buy the lsd seperatly? and will the lsd I buy make a difference at all? sorry just knew to the whole diff gearing thing, have done a bit of research.
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 Post subject: Re: Best Diff ratio??
Posted: Thu Aug 04, 2011 8:23 pm 
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LSD is seperate. Best to lay your hands on a LSD diff and get the gears fitted. Overhaul the diff as well, cost will get up around the $700 mark plus gears. You could try and track down Pintara diff gears, Manual were 3.7 and Auto was 3.9 I believe. Better check that, it is one or the other :D .
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 Post subject: Re: Best Diff ratio??
Posted: Thu Aug 04, 2011 8:32 pm 
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They are all BW75 gears. EB2 onwards generally got a BW78, some got BW75's. MOST gears WILL be noisy and enough to drive you up the wall. IMHO, and this is just MY OPINION, buy brand new gears is the way to go.

 

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 Post subject: Re: Best Diff ratio??
Posted: Thu Aug 04, 2011 8:44 pm 
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hmmm if I can get a lsd diff with what ever ratio then buy the diff gears that I want and put the gears in myself and reshim it then take theold one out and f**k it off will probably be the best way too go. what else do they do when they overhaul a diff?
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 Post subject: Re: Best Diff ratio??
Posted: Thu Aug 04, 2011 10:28 pm 
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67RCE wrote:
Not correct there The Judge. 3.45's are fine for a manual turbo, it's what Ford put in BA1. 3.73's were fitting to any 6 speed manual turbo.


Sorry mate, it is correct. With an E series motor and an X series, forget the 3.45's with a manual if you want serious work out of 1st gear.

Been there done that. With a manual there is nothing but wheel spin and lack of getting any serious boost. With an x series even 2nd gear is how ya going. 3rd is where it is at but with a t5 they're weak as shiit. With an E series you may get a little more boogey in 2nd but with the BA motor, you have more revs and better breathing hence why a 3.45 will work.
You don't have that with an E series, well not as good.

Going a 3.23 wont help much at all either.

3.08's is damn perfect. This is from doing it before.

Currently have a C4 with E series and 3.5 gears and a 3500 stallie. It pulls the numbers in heavy car but she's getting tightened up.

As mentioned. NA 6 manual in the e series3.45's are fine and sensible 3.9's if you must
with an auto 3.7's are good
Turbo manual 3.08
Turbo Auto go 3k stallie and 3.5 gears

 

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 Post subject: Re: Best Diff ratio??
Posted: Fri Aug 05, 2011 12:15 am 
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facer01 wrote:
hmmm if I can get a lsd diff with what ever ratio then buy the diff gears that I want and put the gears in myself and reshim it then take theold one out and f**k it off will probably be the best way too go. what else do they do when they overhaul a diff?


I retract my previous statement of:
67RCE wrote:
I had to leave it open as the OP may be willing to spend the money on new gears.


If you want to do it yourself, don't come back whinging when the diff is completely stuffed due to incorrect shimming, crush, mesh patterns and all.

 

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51TER - DL LTD. Stock.

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 Post subject: Re: Best Diff ratio??
Posted: Fri Aug 05, 2011 12:22 am 
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my dads been a mechanic for 15 years... hell be helping me the whole time.
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 Post subject: Re: Best Diff ratio??
Posted: Fri Aug 05, 2011 9:46 am 
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diff rebuilds are a specialized sector

i dont know many regular mechanics who id trust to do the job properly
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 Post subject: Re: Best Diff ratio??
Posted: Fri Aug 05, 2011 1:18 pm 
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Here is a 2 x Youtube Vid's that may be of help installing 4.11's and a Mini Spool

http://www.youtube.com/watch?v=SSkfmeTDW-c

and

http://www.youtube.com/watch?v=Ty_HLxoxtMM

 

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 Post subject: Re: Best Diff ratio??
Posted: Fri Aug 05, 2011 1:40 pm 
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wasnt somebody complaining that they kept busting their diff on here recently and he was running the early pintara/skyline diff gears and someone can correct me if im wrong but there were people writing on there that his problem was that he was running pintara gears which were weaker and the power and thrashing was fudging them, if i find it ill post up the link

 

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