diff ratios

[vkhawkey]

can anyone help me out. im wondering wat the diff ratios r in a 6 cyl auto vl and a 6 cyl manual vl. do all vls have disc rear brakes. Cheers

[bencom]

I think they are a 3.45.1 standard,only calias has disc rear unless it was a option when new

[vkhawkey]

so manuals n autos have the same ratio do they? So there r vls with drum brakes?

[bangers]

yes autos and manual NA rb30s have the same diff ratio. mainly turbos and V8s had disc rear ends.

[kasey375]

ive got a 3.36 in my vl turbo

[bangers]

you might find that diff centre is out of another model commodore or even out of a ford.

[rb26dett]

I have 3.9's in mine

[kasey375]

you might find that diff centre is out of another model commodore or even out of a ford.

yeah i think its a vk diff

[BigDaz]

i thought the vl diff's were 3.08? might be thinkin of newer models ...

[rb26dett]

v8 was 3.08, 6's were 3.45

[ucwepn]

VN onwards 6 cyl are 3.08. All 6 cyl vl's turbo or NA are 3.45 Borg warner. Most NA vl's out there are drum brake rear. NA 6 cyl rear disc setup uses the 25 spline 2 pinion open wheeler diff. Turbo gets 28 spline 4 pinion.

[BigDaz]

is the rear disc diff better than the drummy's?? coz i just changed mine to rear disc with the diff n all

[kasey375]

is the rear disc diff better than the drummy's?? coz i just changed mine to rear disc with the diff n all

did ya have to change ya booster?

[ucwepn]

Yeah you have to swap the booster, otherwise the rear discs always stay on a little due to the drums needing a constant higher PSI than the discs do.

[mag]

Yeah you have to swap the booster, otherwise the rear discs always stay on a little due to the drums needing a constant higher PSI than the discs do.

you mean change the master cyl..

[ucwepn]

Thats the one LOL cheers haha

I'm gonna do this conversion before the end of the year hopefully, just gotta find a disc brake rear on the right side of $300 LOL

[VL Berlina 5speed]

cant u use the same master cylinder but u have to remove a valve in the cylinder?

[BigDaz]

they dont feel like they are stayin on, i didnt change the master cyl .... any1 done the conversion or u guys just talkin up like i've found alot of ppl do around here ......

[ucwepn]

Well I've done a bit of studying in this area LOL, The info I found for the disc brake rear conversions being done on VL's was that there is a PSI difference between the master cylinders because the drums are using the extra psi to keep the shoes open because they are spring loaded. And that if you use the drum master cylinder on a disc brake rear conversion you will get a small amount of brake drag because the pad will be touching the disc. Calais turbo are the best for VL tech articles, I swear by the guys there.

There are dreamers on every type of forum on the net, its just human nature rofl

[BigDaz]

lol yeh tru. I try and stay clear of CalaisTurbo if i can, man some of those guys like an argument!

[1991_Vn2nV]

ive got a 3.36 in my vl turbo

Whats the reason for the 3.36 diff ratio? Wouldnt you prefer the 3.45 VL ratio instead, and the Borg Warner diff is stronger than the big salisbury diffs?

[vkhawkey]

the tail shaft doesnt have to be changed does it

[RVN 355]

v8 was 3.08, 6's were 3.45

and VL turbo was 3.5.1

[1991_Vn2nV]

and VL turbo was 3.5.1

No VL Turbo's had the 3.45 ratio also. Same diff as the VL V8 (4 pinion, 28 spline), but with the 3.45 ratio.

[BigDaz]

^^^ thats right too, i read it in the gregory manual