What diff is this from

[pumpngo]

Hi i bought a hot rod with a m78 diff that i think is holden , any help identifying it and what it came from would be much appreciated.
P/N 870a=400s=na
ratio 2.77 ser no 4388

 

[Lex]

Hi i bought a hot rod with a m78 diff that i think is holden , any help identifying it and what it came from would be much appreciated.
P/N 870a=400s=na
ratio 2.77 ser no 4388

Post some pics of your diff & especially of the hot rod, please.

 

[pumpngo]

No problems , but i'll have to wait for my son to help , i'm hopeless on computer.

 

[Immortality]

Hi i bought a hot rod with a m78 diff that i think is holden , any help identifying it and what it came from would be much appreciated.
P/N 870a=400s=na
ratio 2.77 ser no 4388

2.77 ratio isn't a stock Commodore ratio unless maybe from a VK or maybe VL but those were M75 diffs. 2.77 could be from a Ford which used the same diffs.

Or I'm completely wrong?

 

[vc commodore]

2.77 ratio isn't a stock Commodore ratio unless maybe from a VK or maybe VL but those were M75 diffs. 2.77 could be from a Ford which used the same diffs.

Or I'm completely wrong?

Borg warner had 2.77 gears....So yes, Ford and Chrysler....Not sure about VK and VL Commodore though

 

[gtrboyy]

Would say ford or chrysler at a guess if 2.77 gears.

Checked what stud pattern or type of brakes & handbrake to determine what it is from?

 

[losh1971]

Hot rod my guess is Ford diff.
.

 

[pumpngo]

it was advertised as ford 9 bolt but when i measured it i thought it was too narrow and has the buick v6 in it so thought it may be commodore

 

[pumpngo]

It is ford , I didn't check the pcd of studs and it's about 114mm . Sorry for the trouble guys. I have searched the numbers on the tag as i thought it would be easy, but found nothing . I wanted to buy a limited slip centre so i wanted to confirm what it is . From what i found the 277 is 25 spline axles not 28 so i don't know if the centre will fit.

 

[gtrboyy]

25spline would be something really old especially if drum brake