Crawler gears!

[4X4]

Manual Tranny

Transvestite

mmmmmmmmmmmmm?

 

[frosty]

Manual Tranny

"Pre Op",,,,,,,Yobbo???

 

[Pure Yobbo]

Transvestite

You wish

It's a hard one. Current thoughts are go the 85% as eventually this one might end up with bigger wheels etc and do alot more off roading - not a word Frosty

Would hate to be at a point in the future going I wish I put those lower gears in.

 

[4X4]

You wish

It's a hard one. Current thoughts are go the 85% as eventually this one might end up with bigger wheels etc and do alot more off roading - not a word Frosty

Would hate to be at a point in the future going I wish I put those lower gears in.

If you fit 35's or bigger the 85% would be the way to go.

 

[rodw]

Yobbo, Not really familiar with you Nissan but I'll toss in my 2 cents. If you have an auto, maybe go the 85% but if you got the manual, go the 43%

Reason I say that is that after looking at what you seem to be doing with your vehicle in the shed the low gears are probably too low most of the time but there is a case for the real low ones in an auto as per Marks site. The gears don't fix the high range in your vehicle like say the Sierra where the gears alter both high and low range.

In this country (and particularly in QLD), we don't do the rock crawling the yanks do in the Moab so the need for ultra low reduction is not required as much.

Anyway if it was me, I'd fix the diffs first before I did the gears so I fixed the high range before the gearing. But then again, to do the gears in my truck would be a $5k item as I would need a modified t/case out of the US

 

[Pure Yobbo]

After some more research the 43% will be the go. They will be better suited for the 4x4ing we intend on doing in this 4x4.

Thanks for all the input guys.

Cheers

 

[Jarh73]

You wish

It's a hard one. Current thoughts are go the 85% as eventually this one might end up with bigger wheels etc and do alot more off roading - not a word Frosty

Would hate to be at a point in the future going I wish I put those lower gears in.

What are is your total reduction for first gear low range?

Diff Ratio x Transfer Case Ratio x First gear Ratio.

I think with a manual you will find a really really really low first gear.
Probably too low.

85% and an auto can be ok but first gear on a an auto is never very low so the total reduction will be ok.

But i suspect in a manual it will be too low to be really useable.

Rather than discussing percentages I'd calculate total reduction.

Personally I think the 45% gears would be more than enough.

In my Patrol (GU 2.8) with and 85% reduction I'd have a first gear ratio of 70:1

Cheers

Justin

 

[Jarh73]

Well I'm going through the same decisions at the moment.

Here is thoughts i have: (285/75/16 Tyres)

Standard Gearing

37.73:1 First Gear Low Range

AND

Fifth Gear 57.0 kmh @ 3000rpm

24% Reduction (which is actually 18% but advertised at 24%) i get the following:

46.4:1 First Gear Low Range

AND

Fifth Gear 46.3 kmh @ 3000rpm

OR

43% Reduction.

53.43:1 Reduction first gear low range

Fifth Gear 40.2 kmh @ 3000rpm

So is 40 kmh sufficient in a patrol for sand work?

The 2.8 at 3000rpm is ultra smooth and easily revs to 4000rpm but 3000rpm is sweet spot.

Cheers

Justin

 

[Pure Yobbo]

Have to day it's the best investment I ever made - especially for decents. Takes a bit of getting used to. I found I was using a bit too lower gears at times when I could have been up a notch.

40km/hr is quick enough in the soft sand - once on the hard you change to high anyway.

Cheers

 

[frosty]

I'm gunna fit the 43% in mine, soon. I reckon they're the way to go. Yobbo, did you fit yours or have it done??

 

[Pure Yobbo]

I'm gunna fit the 43% in mine, soon. I reckon they're the way to go. Yobbo, did you fit yours or have it done??

Had them fitted by a gearbox and diff bloke. Harts Transmissions. Apparently it's a bit of a mission to fit going on what I have read / heard. Think it cost me $660 inc. This also included the new oil etc for the box. Brought the gears direct from Marks myself.

Cheers

 

[Jarh73]

Thanks Guys.

I'm actually really surprised that the low range is not low enough.

I have never read that as an issue, especially with a manual and only slightly larger tyres. (fair enough with huge tyres)

I find it odd given the Patrols status in the 4WD market that this is rarely bought up as an issue.

I also find it odd that virtually all 4WD training advice constantly says not to use the brake (or as little as possible) going down steep descents unless you are in an automatic.

Its just not possible in the Patrol without touching the brake. I think that is the biggest surprise.

Anyway I love my Patrol and I'm not knocking it, I'm just thinking out loud that Nissan didn't think the gear ratios through properly.

I'm going to research the 1st and 2nd gear low range of as many 4WD as i can find to actually see where the Patrol sits.

Cheers

Justin

 

[Pure Yobbo]

Put is next to an 80 series manual and see what you think. I watched an 80 do some decents at LCMP and thats what done it for me - needed to drop the ratios in the Patrol.

Keep in mind like suspension ratios in cars are developed to try and suit all applications, farmer, beach, mines, what we do on the tracks etc. It's just the ratios are a little high for the applications we use our Patrols for.

 

[Jarh73]

Hey Yobbo

I agree with what you said the only difference is that I have the tiny 2.8 straight 6 and its not very good at all off idle. Combined with the sensative throttle.

Interestingly I have been made aware that the 2.8 has higher compression than the 3.0L motors so I should have better engine braking relatively.

Maybe its just my expectations too!

Kinda odd that a Landcruiser would probably have met my expectations

Oh well I guess I have Toyota tastes and a Nissan budget.

Cheers

Justin

 

[toyoda]

Oh well I guess I have Toyota tastes and a Nissan budget.

Cheers

Justin

OUCH!! haha....