Diffs

[Bonnie and Clyde]

Hello, just been asked the question and as normal i have to ask you fine folk the answer. Cols just asked if all of our cars (monaros,vxr8's etc) run on 3.4 diff as standard or do some models come with the 3.9. If they are 3.4 as standard who would have come up with the idea of upping it to the 3.9? Help me help me i'm thick

[porrohman]

I dont think any come with a 3.9 as standard. Most are 3.4 except 5.7 vxr which is 3.7. A 3.9 diff will give better acceleration in each gear.

[stigmundfreud]

All but the 5.7 vxr run a 3.44 diff. The gearing in the 6.0 vxr gear box gives an equiv of running a 3.9 diff. The 5.7 vxr had a 3.71 diff.

[MyM8V8]

stigmundfreud said:

All but the 5.7 vxr run a 3.44 diff. The gearing in the 6.0 vxr gear box gives an equiv of running a 3.9 diff. The 5.7 vxr had a 3.71 diff.

or even 3.46.

[stigmundfreud]

whats 0.04 between lovers?

[Magic919]

I think some of the Utes run a 3.9-ish diff.

[MyM8V8]

stigmundfreud said:

whats 0.04 between lovers?

or even .02

[trickas]

my auto maloo runs a 3.09
thanks steve

[monkfish1]

trickas said:

my auto maloo runs a 3.09
thanks steve

3.09,not 3.91. The autos go well with a 3.45 though

The HSV GTS-R was fitted with a 3.9 from the factory.

[stigmundfreud]

Oh I wonder if someone is running 3.45's then, thats cheating.... but then an auto with a 3k stall is cheating too hey Gareth

[Bonnie and Clyde]

stigmundfreud said:

Oh I wonder if someone is running 3.45's then, thats cheating.... but then an auto with a 3k stall is cheating too hey Gareth

SSSSSSSSSSSSHHHHH

[MyM8V8]

stigmundfreud said:

Oh I wonder if someone is running 3.45's then, thats cheating....;)

I agree, that why I run 3.46's and I don't run a 3000 stall either!

Edit: Thanks Mel

Edited by MyM8V8 on Sunday 10th May 20:42

[TerryS]

monkfish1 said:

The HSV GTS-R was fitted with a 3.9 from the factory.

Indeed, I saw someone on LS1.com.au is selling 4.11 kits now.

[MyM8V8]

TerryS said:

monkfish1 said:

The HSV GTS-R was fitted with a 3.9 from the factory.

Indeed, I saw someone on LS1.com.au is selling 4.11 kits now.

How mucho?

[TerryS]

Not sure
www.ls1.com.au/forum/showthread.php?t=118450&highlight=4.11

[trickas]

yes its a 3.09 i printed on the sticker on the diff and I checked by turning the prop by hand and checking it
3 to 1 ratio
thanks steve

[iacs_hsv]

M6(T56):

---

GTS-R (GTS 300) 3.91
GTS (ClubSport R8) 3.73
Monaro CV8 3.46

Edited by iacs_hsv on Monday 15th June 00:21

[MyM8V8]

iacs_hsv said:

M6(T56):

---

GTS-R (GTS 300) 3.91
GTS (ClubSport R8) 3.73
Monaro CV8 3.46

Edited by iacs_hsv on Monday 15th June 00:21

This "may" be confusing info, and I think you have to put down the year. eg. I had a 2006 VZ Clubsport R8 (M6) which had 3.46's.

[iacs_hsv]

Agreed - I should have been more specific. I was referring to the original HSV UK imports brought in by Rod, I forgot about the private imports which may have a different ratio.

Cheers, Paul