Help on diff gears

Prob best to go for a ride in a few cars with different gears if ya can! The lower ratio u go the more responsive but alot of the time, the less kms per tank u wil get..depending on driving conditions but as a general rule of thumb..

 

even the 3.46 make a massive difference with the big weight of the WH over the standard 3.07's, i got 3.9's aswell but never put them in yet, IMO there would be hardly a difference between 3.9 and 3.7's, i doubt you would really be able to tell really

 

4.11s ftw

 

hey guys, i know this thread started years ago but seems people are still making the odd comment so thought i'd chuck up a question....i'm thinking about changing diff gears to 3.46 in my vy ss auto, will this put the speedo out? i will be getting them installed perfessionally. cheers

 

the speedo will be out a little bit yes, but its quite easy to get it recalibrated

 

Thanks mate. Is it a difficult task and also can any performance shop recalibrate it for me?

 

for an auto like a wh is you would go either 3.46 out of a manual ss or 3.73 out of a manual hsv. the 3.46 is a good comprimise and easily found for sale 2nd hand where as the 3.73's would probly need to be bought new and fitted. these will rev higher on the hiway and would be more suited to around town and the strip

 

It takes 2 seconds to do so get it tuned at the same time

 

Auto - 3.9:1. Seriously. Dont #### about.

 

Thanks guys. Wont be going 3.9's as I do too many hwy kms and dont want to compromise fuel economy. Will be conservative and go with 3.46's if anything

 

What did you end up going. I would still say go for 3.73 even with country driving. I don;t do much country and ended up with 4.11s behind my 4L60e and so far am loving it. Should have done it earlier.

QldKev

 

I haven't put any gears in yet but when I do i'll be most likely chucking in some 3.46's and a baby cam at the same time. 3.73's seem to very popular with the auto's so i may consider these when the time comes

 

Go get it done at Total Traction Drivelines in Moorabbin.
They recently rebuilt my LSD and they have worked on my mates ute also.
They are straight to the point and give you genuine advice, I rate them highly.

 

Thanks mate, will give them a call when the time comes, I dont live far from there so could be handy

 

A quick google search would bring them up or shoot me a PM.
Happy to help mate.

 

all the comments on here seem to be relating to V8's,
my question is that is there a difference between the v6 and the v8 diffs ?? i have been looking at the diffs on ebay and it refers to:
"WITH THE 3 BOLT DIFF FLANGE
PLEASE NOTE THAT THIS DIFF HAS NO PINION SPIGOT BUT STILL FITS OK"

can someone please explain it all too me,
bascially will a v8 diff fit in a v6?

 

Yes the V8 diff will fit into a V6.
The 3 bolt diff flange is what your VZ will have. Up until VT series 1 it was a round flange.
The pinion spigot helps align the tail shaft onto the diff, really it is not needed and you won't find any difference in fitting it. If anything you will find it easier to fit without it as you don't need to slide the diff onto it.

QldKev

 

3.08 to 3.46 is not worth it in my opinion only if your getting it for free

 

+1

When you spend 4hours under the car to swap it over, just do it once, do it properly.

QldKev