Diff ratios

Unread post by **meanfalcon** » May 29th, 2010, 12:22 pm

I guess at some stage almost everyone thinks about it. Now that my tyres are 90mm (diameter) larger than they once were, I sure am. Low range engine braking, combined with the auto, is only good for about a 20 degree decline and the highway towing is difficult having to maintain 120 kph in top gear for the engine to develop enough torque to cope on the flat ground. There is KAM and Ashcroft. What will be the best economical outcome? I expect 4.1:1 is the most common with the ideal towing speed being 80-90 kph.

Unread post by **Disco_S.two** » June 2nd, 2010, 4:30 pm

Diesel or petrol?

I have the diesel with 265/75R16s and when I went to larger tyres I just got my ECU re-mapped and just stay on 91 speedo = 100 road. (you can get a Truspeed unit to correct this error if you want).

I think 3.54:1 is std, I believe there is a 3.8:1 option. the 4.11s are for if you've gone to 285/75R16s or bigger.

Waz

Unread post by **meanfalcon** » June 12th, 2010, 2:33 pm

I have the V8 petrol. I can get a chip to help the engine for $600. Anyone tried this? or replace diff gear sets from $2800 - $3700.
Or Buy a series 4 for $85,000.
Or **** the economy just drive around burning 20-25 litres per 100kms.

Mick.

Unread post by **disco_thrasher** » July 13th, 2010, 12:17 pm

meanfalcon wrote:I have the V8 petrol. I can get a chip to help the engine for $600. Anyone tried this? or replace diff gear sets from $2800 - $3700.
Or Buy a series 4 for $85,000.
Or **** the economy just drive around burning 20-25 litres per 100kms.

Mick.

i dont know where you got those prices from day light robbery
Great basin Rovers in the US Salt lake city landed in oz for $990
give Bill a ring
Cheers Kelvin

Unread post by **meanfalcon** » August 2nd, 2010, 6:56 pm

That price is fully installed.
Ashcroft gears-$1200
Getting them set up in the diffs-$600
Remove and replace also a conversion on
the tailshaft to remove the rubber thing-$1000

Sound any better.

I got the bruce davis ecm fitted.
Hardly notice the difference.
I''ll run a couple more tanks and
post some results later.

Unread post by **disco_thrasher** » August 4th, 2010, 10:47 am

meanfalcon wrote:Remove and replace also a conversion on
the tailshaft to remove the rubber thing-$1000

.

holy moly 1000 for that yell them they dreaming