IRS Diffs & Ratios

[leehamescort]

G'day,

Doing a bit of research before I spend the hard earned.

I want a strong independant diff and am looking at the paj IRS (will be going in the front of my car, giving me longer axles for reduced CV angles)

What Ratios are available in the IRS?
Are their different IRS diffs?

I am in the process of building the rear and need to know what ratio I am likely to run and what is the best $$$ option.

Thanks for the help.

Leeham

[glenn_c]

T/case & Final Drive Ratio's

Gen 1

2.3TD = 4.875, 5.29
2.6 / 2.5TD = 4.625, 4.875
2.5TDI = 4.625, 4.875
3.0 V6 = 4.625, 4.875
t/case = 1.944:1 low range for 2.6, 2.3TD & 2.5TD, 1.925:1 for 3.0 V6

Gen 2

2.6 = 4.875
2.5TD & 2.5TDI = 4.875, 5.29
3.0 V6 = 4.625, 4.875
2.8D = 4.875
2.8TDI = 4.90
3.5 DOHC V6 = 4.636
t/case = 1.925:1 low range for 2.6, 2.5TD, 2.5TDI & 3.0 V6, 1.90:1 for 2.8TDI & 3.5 DOHC V6

Gen 3

2.8TDI = 4.90 5sp man
3.2 DID = 3.90 5sp auto or 4.10 for 5sp man
3.5 SOHC V6 = 4.30 5sp man & 5sp auto
3.8 SOHC V6 = 4.30 5sp auto
t/case = 1.90:1 for all



Axle Data

Gen 1

2.6, 2.3TD, 2.5TD & 2.5TDI (some) :-
front axle = 25 spline, 29mm diameter, diff = 7.25" diameter (low pinion)
rear axle = 28 spline, 30.5mm diameter, diff = 8" diameter
3.0V6 :-
front axle = 28 spline, 29mm diameter, diff = 8" diameter (low pinion)
rear axle = 28 spline, 30.5mm diameter, diff = 9" diameter

Gen 2

3.0V6 :-
same as Gen 1 except for NH & NJ auto has 7.25" diameter front diff (high pinion) NH & NJ 5sp man has 8" diameter front diff (high pinion)
2.5TDI :-
same as NH & NJ auto
3.5V6 & 2.8TDI :-
front axle = 28 spline, 29mm diameter, diff = 8" diameter (high pinion)
rear axle = 31 spline, 33.5mm diameter, diff = 9.5" diameter

Gen 3

3.5V6, 2.8TDI, 3.2DID, 3.8V6
front axle = 28 spline, 29mm diameter, diff = 8" diameter (high pinion)
rear axle = 33 spline, 36mm diameter, diff = 9.5" diameter

[leehamescort]

Thanks Glenn,

Gen 3 are the IFS curvy shaped Paj, yeah??

at the moment 4.1 is looking like my idea ratio, are the Gen 3 3.2 DID 5 speed manuals a common vehicle or are they something that was not common and i will have to hunt through a lot of wreckers for?

Please excuse my ignorance as I am technicaly Paj Challenged.

Thanks
Leeham

[NJV6]

The Gen 3 is the ones with IRS and IFS. The Tech info page is a great one.

NJ

[leehamescort]

Thanks guys, yes the tech page is fantastic in the Paj section already checked that out.

I have now decided to go a different route as lockers seem to be a problem for these diffs.

Thanks again

Leeham

[-Scott-]

lockers seem to be a problem for these diffs.

Not for long.

[PajeroSRV]

I'll put a bet on that ARB's are not his weapon of choice

[oozuk]

the NM Pajero came with a factory diff lock in the IRS as an extra add on, now thats the model diff you want