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| DaveXR8 |
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I was just wonedering if the 3.9 diff gears will fit into the original AU3 XR8 diff? and how is this done?
_________________ AU3 XR8 Manual, Full options,Pursuit Lip, Boss bonnet, Hurricane extractors, zorst, SS Induction, K&N filter, Flash tuned...191rwkw |
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| Anton |
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more information, where 3.9 gears from etcetc
also if ou got auto be prepared for 3k rpm as you driving down the highway at 100 |
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| DaveXR8 |
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just saw it on ebay and was curious. its a Borgwaner 3.9 diff gears.
and my car is a manual.
_________________ AU3 XR8 Manual, Full options,Pursuit Lip, Boss bonnet, Hurricane extractors, zorst, SS Induction, K&N filter, Flash tuned...191rwkw |
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| DaveXR8 |
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what is the ratio of the standard diff and will a 3.9 be too much if i drive daily as well?
_________________ AU3 XR8 Manual, Full options,Pursuit Lip, Boss bonnet, Hurricane extractors, zorst, SS Induction, K&N filter, Flash tuned...191rwkw |
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| ELGT |
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3.45 is standard, 3.9 will be fine, it will just rev a little @ 110. Your top gear is .73 roughly (manual. .68 auto) and in my XA I have 3.7 rears, and sit on about 2800 @ 100 with a 1.1 top gear....
Diff gears make a huge difference |
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| Swine |
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Posts: 266 Joined: 16th Feb 2007 |
I've got 3.9's in my ef xr8 auto, sits on 2400rpm at 100kmh. The only time i really notice the rev's is from 90kmh up.
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| DaveXR8 |
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do the 3.9 gears fit into the standard diff?
is it something i could do myself or is it best to get a qualified person to do it?
_________________ AU3 XR8 Manual, Full options,Pursuit Lip, Boss bonnet, Hurricane extractors, zorst, SS Induction, K&N filter, Flash tuned...191rwkw |
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| Swine |
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Posts: 266 Joined: 16th Feb 2007 |
Gears should fit fine. I'd take to a diff shop to be done. I paid $1100 for 3.9's fitted plus lsd rebuilt.
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| Sprjenkins |
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I just rang up two different diff places and was told that you can't fit skyline/pintara gears into an ea or later Falcon as the pinion heights are different. I don't know if this is true but be carefull mate. Can anyone else clear this up, has anyone done it?
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| DaveXR8 |
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{USERNAME} wrote: I just rang up two different diff places and was told that you can't fit skyline/pintara gears into an ea or later Falcon as the pinion heights are different. I don't know if this is true but be carefull mate. Can anyone else clear this up, has anyone done it?
the ones which I am looking at specifically say falcon or mustang diff gears. Maybe the sylines only fit into the commodores cos the vl's have a similar tye of set up dont they?
_________________ AU3 XR8 Manual, Full options,Pursuit Lip, Boss bonnet, Hurricane extractors, zorst, SS Induction, K&N filter, Flash tuned...191rwkw |
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| Sprjenkins |
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Yeah I found out that you can fit them after all. If someone tells you can't tell them they don't know what there on about. Victoria diffs in mitcham do it and Northern Differentials in Campbellfield do it as well. It involves putting bw 75 series gears into the bw 78 series of your falcon. It can be done if you know what your doing.
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| Sprjenkins |
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Yeah I found out that you can fit them after all. If someone tells you can't tell them they don't know what they're on about. Victoria diffs in mitcham do it and Northern Differentials in Campbellfield do it as well. It involves putting bw 75 series gears into the bw 78 series of your falcon. It can be done if you know what your doing.
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