final drive modifications ??

[green monster]

hi all
I remember reading that someone out there with an NM has modified the final drive ratio to make towing a large trailer a bit easier, I am wondering if i may benefit from the same mod? as im finding my gearing is a tad too low now with the bigger wheels fitted,(maybe even bigger soon)
Is it easy to do and what ratios have been used / tried,
thanks cam

[mrbitchi]

The only way to modify the overall gearing, aside from different sized wheels/tyres, is to change the diff ratios... Could get a tad expensive..

Can't see that you'd notice any difference in an auto anyway. Yours IS an auto??

[psproule]

I'm guessing here, but there are probably a series of ratio's available between the three different motors in an NM (Dont forget the 2.8) and again between auto and manual. But there would be a bit of work involved. Are tyou sure you aren't talking about the lower low-range gearing available through Mark Hardman?

Pat

[green monster]

The only way to modify the overall gearing, aside from different sized wheels/tyres, is to change the diff ratios... Could get a tad expensive..

Can't see that you'd notice any difference in an auto anyway. Yours IS an auto??

$$$ thats the biggie here !
But i am sure that someone out there was writing about changing final drive ratios (high range) to make towing their large trailer full of scaffolding?? easier,

if its possible i would imagine it would give me more power when towing heavy??

and yes its auto ,,mores the pitty

[1993 NJ LWB]

Well i guess you have a v6 seeing as you have injected gas. That means your final drive is 4.3:1. You could buy the diff centers out of a 2.8 tdi fairly cheap and put them in your self for no extra cost. This would change your final drive to 4.9:1. Witch i think is about 12% increase in gearing.

Jack

[swordfishBob]

I have a 2.8 and would like a higher gear, though it would mean changing back on the hills when towing. Anyone know the 4th and 5th ratios in a 2.8td manual?
I don't suppose Green Monster is in nthn inland NSW..

[kibz]

I also thought there was a thread about diff ratios, axle sizes and/or spline sizes compared with auto verses manual somewhere on here too.....

[kibz]

just did a "diff ratio" search and found these 2 threads. "Lowering diff ratio" and "Pajero diff ratio" both in "where the rubber hits the road" (sorry don't know how to link thr threads). Hope this helps.

[Ian Sharpe]

mate, it can be done, I did it in my NK 3.5l

The diffs from the 2.8TDI 4.90 are a straight swap in, you have to do front & back.
But IMO it was not a cost effective exercise unless you can get the diffs cheap or can do the work yourself. If you source the diffs from wreckers expect to pay $500 a piece. Plud fitting if you can t do it yourself.

Good luck