Then I have a high performance (supposedly) in another VZ with BB on it & it's 2.87
Been 3.08 would indicate it's probably a V6 diff so M76.
Holden202T wrote:I recall a few months back when I was looking for diff gears for mine that the gears are stamped with a 4 digit number, like 0578 or something like that which told you if it was vn-vs or later
The last 2 digits would indicate the crown gear size so 0578 should be 7.8" or more commonly knows as BW78, M78 or BRT78
I think the last set of gears I pulled out of a VS 3.08 LSD was 0575
No Commodores with M76 (not even sure such a thing exists), M86 in a couple.
You will normally find 0575 / 0578 / 0580 on the crownwheel gear at least. Not sure if this changed to something different when BTR took over manufacturing.
immortality wrote:I think the last set of gears I pulled out of a VS 3.08 LSD was 0575
yeah and as I understand 75 or 78 or whatever they were was the difference between the earlier BW's to the later ones like vt-vz type stuff or something like that.
No matter what the question is, the answer is always more horsepower!
No Commodores with M76 (not even sure such a thing exists), M86 in a couple.
You will normally find 0575 / 0578 / 0580 on the crownwheel gear at least. Not sure if this changed to something different when BTR took over manufacturing.
Whoops, that was a typo, meant M75. Fairly sure BTR used the same codes. I'm fairly sure the pinion I've got down in the garage is a BTR 0575.
No Commodores with M76 (not even sure such a thing exists), M86 in a couple.
You will normally find 0575 / 0578 / 0580 on the crownwheel gear at least. Not sure if this changed to something different when BTR took over manufacturing.
Do we know which vehicles are fitted with M86? Do they have a different housing to the M80s?
My info says M86 in some VY, VZ "beam" (live axle) crewcab and one tonner (I guess technically they are not labelled "Commodore" then). So no way those housings will be the same! The extra crownwheel size would require a fairly different pinion position anyway.
The remaining live axle commercials are M78, the rest are pretty well all M75 and M80.
Ford Territory IRS and BA/BF/FG live axle also got M86.
Just to update this thread I ended up swapping the LSD 3.08 to go the heavy duty 3.07 as there was weird noises with 3.07 a small squeek, squeek on slow spped decel in a straight line with a thump when below 1kmh 50% of the time (but there's no backlash) & 3.07 is now quiet as a mouse. I thought it may have been the rear extension housing seal making the noise but couldn't hear it on hoist so took the chance it was the diff & viola, just for note of reference too I had the 3.08 spot on 100kmh reading but when i'm doing 100kmh with 3.07 now I'm actually doing 102kmh!
