Re: Borgie Diff internal swaps
If you are running a manual a 2.75 will be pretty hard on clutches. 2.92 with a 4 speed will give 2500 RPM @ 100KM/H 3.23 will give approx 2800RPM @100 Km/h.
Having said that if its all highway K's you are doing clutch wear shouldnt be too much of a problem.
2.75 diffs have different centres to 2.92 and lower ratios so you need to swap he whole centre, you can't swap the ratios on the centre without making up spacers for te crownwheel etc. There are a few threads on this, do a search.
I've got a 3.5:1 , 2.92:1LSD and a 2.92 4 pinion single wheeler, I went to a diff shop and they said that they can build me anything I want from the 3 diffs for about $600.00 fully reconditioned so it is worth shopping around for a diff place that knows what they are doing. Not all housings are the same and centres come in 25 and 28 spline versions.