IRS Diff Ratio

[FTe342]

I have a complete IRS cradle inc diff, drive shafts etc but not sure what it came from - possibly a Fairmont but not sure if 6 or 8 cyl. Don't know what Series it is either

The ratio label sticker is not readable but the metal tag on the filler hole says its high performance.

I'm hoping its a 3.45. Were there any other ratios ratios available?

[Jimmyd]

Originally Posted by FTe342

I have a complete IRS cradle inc diff, drive shafts etc but not sure what it came from - possibly a Fairmont but not sure if 6 or 8 cyl. Don't know what Series it is either

The ratio label sticker is not readable but the metal tag on the filler hole says its high performance.

I'm hoping its a 3.45. Were there any other ratios ratios available?

Can't recall seeing a "High Performance" metal tag on an AU IRS - usually see this if anything



As for the diff ratio there will be two labels,

yellow one on the diff head,




white barcode one on the cradle,



Cheers

[FTe342]

Thanks so much. Its leaning up against a wall so didn't see the cradle barcode sticker. It's a 3.23. The metal tag says High Performance SE approved oil to be used. So it may not even be a LSD?

[Jimmyd]

Sounds like a single spinner V8 Ghia diff.

Easy way to check LSD or not - lock up the pinion flange and turn one hub. If the other hub turns in the same direction its a LSD, if turns in the opposite direction its a single spinner.

[SSD-85]

Originally Posted by Jimmyd

Sounds like a single spinner V8 Ghia diff.

Easy way to check LSD or not - lock up the pinion flange and turn one hub. If the other hub turns in the same direction its a LSD, if turns in the opposite direction its a single spinner.

Did any of the AU series V8 ghias/non-ghias come with LSD without it being a special order?

[FTe342]

Originally Posted by Jimmyd

Sounds like a single spinner V8 Ghia diff.

Easy way to check LSD or not - lock up the pinion flange and turn one hub. If the other hub turns in the same direction its a LSD, if turns in the opposite direction its a single spinner.

Thanks again. Easier said than done cause the rotors are rusted up from sitting outside. Mate was going to use this to build a Tru Track for XR8 but ratio is wrong so no use. I notice it has different thickness driveshafts to my T3 diffs so may as well strip it and just keep the cradle.

What about the driveshafts - are they same for XR8?