Outer Limits 4x4 Board

All TB4.2 autos, both Patrols and Mavs
1st 2.784:1
Low 2.020:1
Diff 3.9:1
Patrols came with either 265/70 r16's or 10r15's, basically same diameter,
but Mavs had 215/80 r16 nearly an inch smaller, so how did they compensate, did they just mess with the speedo or is this info wrong?

Got the info from the RACV website, I would have thought their info would have been fairly correct.

No its wrong.

all models have a final drive ratio of 4.111:1 except the patrol ST and Ti models equipped with a manual transmission, 3 litre models and Maverick XL models. The 3 litre model has a ratio of 4.375:1 and the ST, Ti and XL models have a ratio of 3.900:1

Hmm, now I'm confused, just when I thought I was starting to understand the diff combos.
I'm a little slow, what auto tb42s had 4.1's.
I have been looking at car yards, and haven't seen any auto tb42s with 4.1's yet, only the 3.9's.

msh wrote: what auto tb42s had 4.1's.
.

None. All have 3.9s.

I thought all the autos had 3.9s as well, but maybe I just pulled that out of my arse.

But anyway the manuals vary more than that; I've had two mavericks that both came stock with a manual transmisson and 3.9:1 final drive. And Mavs have TB42s, no smaller engines.

Then again there are also lots of stock Mavs with 4.1:1 diffs and manual transmissions.

(Just on this as well, 3.9:1 diffs and 33" tyres are FANTASTIC with a petrol 4.2. I was expecting the car to be a real dog with the 33s on because of stuff I had read here, but now I can only conclude that it was all from people with diesel motors. The ratios are just right now. It pulls well, and it's stilll low-geared enough that I can take off in second gear if I'm feeling lazy, but it doesn't have that "in 1st gear for 0.1 seconds" feel any more.

Jason

chimpboy wrote:I thought all the autos had 3.9s as well, but maybe I just pulled that out of my arse.

That's what I thought as well, so if all autos had 3.9's how did they compensate for for the differing tyre sizes?
Did they just adjust speedo settings?

msh wrote:

chimpboy wrote:I thought all the autos had 3.9s as well, but maybe I just pulled that out of my arse.

That's what I thought as well, so if all autos had 3.9's how did they compensate for for the differing tyre sizes?
Did they just adjust speedo settings?

Yep, just different speedo drive gears.

Cool, thats what I wanted to know.

chimpboy wrote:I thought all the autos had 3.9s as well, but maybe I just pulled that out of my arse.

*waves hand in air*

My Diesel Auto had 4.1's standard... Mates manual of same month/yr had 4.1's...

me thinks it has to do with what they have in stock at the time of building... there seems to be no set standard of gearing.

Surely there would have been a set standard, they can't be that crazy to just whack in what was laying around.

My research was done on only LWB's autos, I came up with all petrol autos with 3.9's, and diesel auto's with 4.1's, can't really comment on manuals.

I would have thought that the auto's would have had a better diff ratio since 1st is geared so high.

Thanks guys.

(I didn't mean to start the diff debate, I was just wondering about the speedo gearing)

msh wrote:and diesel auto's with 4.1's, can't really comment on manuals.

and just when you thought it was safe to go back into the diff.. other GQ TD42 GQ I know had 3.9's... I stand by my prevoius statement

When you purchased one new, you could probably tick a box to pick which ratio you wanted.

Mine's a manual, petrol Ti with 4.1's.