Help ID Diff?

[philbio]

Can someone help ID this diff on a VK 6cyl Carb, Salisbury or Borg? Cheers Phil

[Wagon_Wheel]

If its a BW i am pretty sure it is stamped on it some where

[philbio]

If its a BW i am pretty sure it is stamped on it some where

What am I looking for?

'Borg Warner' stamped on it somewhere?

Thanks Phil

[Wagon_Wheel]

Yeah im pretty sure all borg warner diffs and gearboxes had BORG WARNER stamped on them some where.

[SL/ENUT]

8 bolt Salisbury, due to the bolt in the cover plate, not a runbber bung like B/W diffs.

[philbio]

OK well in that case I have a Salisbury diff in the VK and want to change to a Borg Warner Diff with discs. What do I have to get?

1) BW Disc Brake Diff and HandBrake cable off of some sort of donor car.

2) Different type of tailshaft off of I don't know what.

3) Change Master Cylinder and Brake Lines?

Thanks Phil

[Cane_It]

maybe get a complete borgy out of a VL with the brakes, calipers lines already attached. you'll probably need the tailshaft aswell.

[SL/ENUT]

1. To get a B/W diff, disc brake, look for a VK Calais or VL Calais. The VL diffs however a longer, 25mm each side i think. Also get the disc brake handbrake cable off the same car
2. You do need a different tailshaft, again look for a VK/VL Commodore with a B/W diff.
3. Not really. You do need a double diaphragm brake booster and you could get the 1" master cylinder if you want. Both of me sles hace the normal 15/16 master cylinder.

[DANNY8]

Here's a page I wrote up about 8 bolts and borgy's.
KB KUSTOMS - Home of the Kerr Bros.

[philbio]

Here's a page I wrote up about 8 bolts and borgy's.
KB KUSTOMS - Home of the Kerr Bros.

That's 100% gold, thanks.

Is the ratio stamped on it somewhere?

Why are the axles removed if you are changing diffs?

[DANNY8]

The ratio is stamped into the crown wheel, if u keep turning it around you'll soon find it.

The axle's are removed so the hand brake cable can be disconnected. I'm not sure why we don't undo the cable from the hand brake itself (there must be a reason but can't think of it)....coz out of the whole diff change, the most annoying part is pulling the axles out as sometimes it can take a while haha.

[philbio]

The ratio is stamped into the crown wheel, if u keep turning it around you'll soon find it.

So looks like I'll have to take the diff cover off to check the ratio, yuk...

[Clutchy]

So looks like I'll have to take the diff cover off to check the ratio, yuk...

Wile its out of a car and ya got the cover off ya might aswell give it a fresh batch of oil.

[philbio]

Wile its out of a car and ya got the cover off ya might aswell give it a fresh batch of oil.

Yep, the thing is I want to buy a diff and I'll have to pull the cover off to check the ratio before I buy it. I don't think the seller will be too happy.

[Smitty]

Can someone help ID this diff on a VK 6cyl Carb, Salisbury or Borg? Cheers Phil

you got one of these....

[vkwalks39]

G'day, where your tailshaft connects to the diff theres a plate you will find the ratio stamped there. Grab your self a wire brush. Thats what i did mate. I was told that mine was 3.08, and i did this found out it was 2.78.... bugger.

[DANNY8]

I don't think all diffs have the plate on them.....if u mean the tag thing. None of our diffs have had any tags, I guess they'd all been ripped off.

So looks like I'll have to take the diff cover off to check the ratio, yuk...

If u know wat car the diff come out of, u can check the compliance plates and see wat it shows......but if the diff isn't original then it could be incorrect.

[car1979]

on late 3.3l's borg warner 78 with a revised ratio 3.22.1
oldholden.com (for more info)

[Cane_It]

the LSDs had tags, not the single peggers
the borgys have a 6 bolt flange arrangment for the tailshaft to bolt onto
the ratio is stamped on the area of the yoke closest to the diff casing.
to check ratio you DONT need to open the diff, set it on axle stands and count the number of yoke spins against the number of tyre spins and do the maths. that'll get you the ratio.

[philbio]

OK,

I went to the wreckers and found a sedan with a BW in it.

I turned each axle and neither the driveshaft or opposite axle turned does this mean it’s shagged?

Also the wrecker said that the diff must have come out of a VL and been put in the VK, I told him it was my understanding that they were standard in the VK EFI 6cyl and he laughed.

He also said that if it is a 3.23 ratio the 202 will be screaming it head off at 110km/h. How can I tell if it is a VK diff and not the VL as I think the VL diff is wider?

[DANNY8]

Not all VK EFI 6's had the BW diff, a mate's Calais has an 8 bolt which was std.

Without pulling the backplate off and seeing wat gear ratio it is (coz VL's were 3.45 and VK's were 3.23), u could check the compliance plates under the bonnet. One of the plates says ENG, TRANS and AXLE. If it's an original EFI 6 the ENG should be LL9, the TRANS should be M40 (all EFI's had the trimatic, nothing else was an option), and the AXLE should be GU5. GU5 is the BW diff wth 3.23 ratio.

We took the first PEAKN6 on a few days trips. That was a standard EFI 6, trimatic and BW diff with 3.23 gears.....I can't remember wat revs it sat at on the highway, but it wasn't nothing to cause concern.

Also the 2nd PEAKN6 we had the same EFI motor in another VH with a 4spd and the same BW 3.23 diff.....that on the highway wasn't to good. We'd be cruising along in 4th gear and it was sitting on about 2500-3000rpm I think...when we opened her up on a backroad she only went to about 160 with not much left in it coz it was sittin on 4800rpm roughly......but yeah with a trimatic it will be fine.

Yeah the VL diff is a little wider.....they can still be used under the older Commies, ya just gotta be careful when ya lower them. I had a VL diff under my old VH and with lowered king springs it was still ok, never scraped. It's just if ya go to low you'll have to invest in an adjustable pan hard rod maybe.

[philbio]

Thanks VHPirie,

Great Info!

How much wider are the VL diffs?

I'll go and check the Compliance Plate on the car but I am still concerned about both axles turning with no driveshaft movement, the car had some homey stickers on the back window so I am suspicious the diff is shagged. If I buy it I won't be putting in for a couple of months so any warranty on it will be gone.

[DANNY8]

Hmmm.....maybe chuck it in Neutral and try and spin the tailshaft.....one of the wheels should be spinning...if one spins, get a mate to hold it and the other wheel should spin...I think that should work.

But yeah if ya spin one wheel, the other wheel or the talshaft should definitely start spinning I would think. If ya spin one wheel, the opposite wheel should spin the opposite way (if ya hold the tailshaft, coz that might try and spin too).

How much does the wrecker want for the diff?

Oh and I think I read on here somewhere that the VL BW diff is about 15mm wider then the VK BW.

[philbio]

But yeah if ya spin one wheel, the other wheel or the talshaft should definitely start spinning I would think. If ya spin one wheel, the opposite wheel should spin the opposite way (if ya hold the tailshaft, coz that might try and spin too)

This is what I expected to happen as well.

I haven't spoken about a price yet until I know if it is suitable.

[philbio]

I spoke to a Diff shop yesterday and another angle on converting the rear from drum to disc is to use a VL BorgWarner V8 Disc Diff 3.08 ratio. Apparently they have stronger centres and will bolt right in except for the tail shaft. Has anyone done this?

The dude at the shop also said that the VK BW 78 diff had different length axles and an offset tail shaft?