Upgrade Vf open diff centre

[Doug Collingridge]

hey guys, just bought a manual S1 SS Vf Ute that seems to have a truetrac 3.27 open diff installed instead of the 3.7 LSD. Obviously someone’s blown the original and put a cheap diff in to sell the car. Anyone know if I can just buy 3.7 diff gears and a LSD truetrac diff locker and put in the open diff casing? Don’t really want to spend 3k for an original LSD

Cheers

 

[losh1971]

Yes, the Trutrac replaces the stock centre. Just make sure you buy Motive gears if going aftermarket the rest are rubbish and come out of Korea. Also check the Trutrac, as there are Chinese Trutrac copies that are also junk. Two middle priced Trutracs are Harrop and Eaton anything cheaper will be the Chinese junk copies.

 

[07GTS]

the VE SS didnt come out with 3.7 diff, only the HSV got the 3.7 in the manuals because of the different gearbox ratios, the HSV auto got the 3.27 u prob had 2.92 stock and they have upgraded it to the 3.27 trutrack

 

[losh1971]

If you have manual I would get 3.9s, 3.7s won't be worth the cost. If auto, normally 3.45s are the go. If going 3.45 you might be able to pick up a set of gen gears which are better than the Motive and can be had for $150 - $200 on the SH market.

 

[Forg]

I don’t understand the terminology, isn’t a TruTrac a proper LSD? I mean it’s not a bodgy clutch one like OEM, it’s considerably more sophisticated Torsen-type which is a better design … isn’t it?
Or has TruTrac as a brand-name been downgraded by selling el cheapo replacement non-LSD centres?

Adding to what @07GTS said, this sounds like someone upgraded it rather than did a cheap replacement!

 

[losh1971]

There are manufacturers who are jumping on the back of the OEM Trutrac and producing something inferior and people are falling for it because the difference in price, thinking they are getting a better deal.

 

[Doug Collingridge]

I don’t understand the terminology, isn’t a TruTrac a proper LSD? I mean it’s not a bodgy clutch one like OEM, it’s considerably more sophisticated Torsen-type which is a better design … isn’t it?
Or has TruTrac as a brand-name been downgraded by selling el cheapo replacement non-LSD centres?

Adding to what @07GTS said, this sounds like someone upgraded it rather than did a cheap replacement!

The boss at work looked up the part number and said it appears to be a diff from an auto SS. previous owner must of blown the original diff and put a truetrac converted open diff from an auto into it?. Diff has (LSD : N) on it

 

[[paradox]]

trutrac

VE-VF Truetrac - Order the Harrop Truetrac VF-VE Differential Online

Experience enhanced traction and control with our VE Truetrac LSD diff for sale. Proven design with larger precision gears and a stronger gear set for repeatable and reliable traction. Order your Harrop Truetrac diff now.

www.harrop.com.au

it will fit in any vf diff housing

 

[Doug Collingridge]

http://[URL][URL]https://www.harrop.com.au/truetrac-holden-zf-32-spline

[/URL][/URL]

Righto cheers

 

[Forg]

Does a (numerically) lower diff-ratio possibly equate better highway fuel economy?