Outer Limits 4x4 Board

hey
looking at getting a set from marks any one else using them? opinions?
thanks any info would be appriciated

im looking at geting some gears too soon.
are there any others besides marks?
sorry for the hijak

I know quite a few people with marks gears and they all love them. i'm hoping to get some in the near future for my GU. never heard of any problems with them.

Have you read this thread.?

http://www.outerlimits4x4.com/viewtopic.php?t=67207

wow mcgill how much more money u gunna spend.wat trucks this for the wagon ? dads lookin at doing em 2

ive got a set of marks 85% gears in my GQ, very happy with them, havent had any probs with them at all

Madmac wrote:ive got a set of marks 85% gears in my GQ, very happy with them, havent had any probs with them at all

X2

is there anything better than 85%??

j-top paj wrote:is there anything better than 85%??

How do you mean better?

If you mean lower then there is no need and they probably wouldn't fit in the transfer case either.

Cheers Mick.

yeh i mean lower, why wouldnt it fit?

j-top paj wrote:is there anything better than 85%??

yeah, twin transfer case set up with 85 % gears in one of the cases

i would if it was a GQ or something... but i dont really feel like cutting an extra hole in the GU

j-top paj wrote:i would if it was a GQ or something... but i dont really feel like cutting an extra hole in the GU

I think we got our wires crossed here.

What I mean is a gear set with larger then 83% reduction wouldn't fit in the transfer case because of the size of the gears. Apparently they have to grind some of the casing out as it is to fit 83%.

83% is overkill for 99% of people and the tyres they run anyway so any more would be just plain useless.

Cheers mick.

I've about 100k with marks gears in still drives ok but will be fitting 43% gears to the next 1 as 85% is to low with 37"

Do you need to trim the internals of your transfer box when fitting the 43% gears - like you do when fitting the 85%

why is it too low? cant u just use a higher gear instead? like use 3rd instead of 1st?

43% should be no need to trim anything off, with 35s and 4.1s the low is often to low (85%) and second a little to hight, with 4.6 ot 4.8 in the diffs they tend to be very good

yeh i got the 4.88s and i need something to save my clutch a bit. so im gona do in when im changing the clutch to save on labour. as soon as i save up enough

j-top paj wrote:why is it too low? cant u just use a higher gear instead? like use 3rd instead of 1st?

Having a top speed of 30km/h reving is a pain in the ass when you are going from track to track etc. You have to stop change back to high then back to low and I drive an auto.

I also see it as a waste of 2 gears if your never using first or second when you could have 43% and get use of all gears and if you need low range on the beach you can.

An example

I've never really used low range much in mine on the beach that much but I did have to tow a buggy on a car trailer off Stockton beach a couple of times and if I had of had 83% reduction at the time I wouldn't have been able to use low range which would have met I couldn't have towed the stuffed buggy off the beach and that is with 37s.

Cheers Mick.

im guessing u dont do much rock crawling?

j-top paj wrote:im guessing u dont do much rock crawling?

I'm guessing your haven't seen my truck.

Yes I do and the 83% reduction gears work well with my 42s on but rockcrawling with the 37s the 83% is overkill.

Cheers Mick.

http://carl.outerlimits4x4.com/viewtopi ... sc&start=0

as mick said 4.88 diffs n 85% gears is to low with 37", with turbo td42 n 35" there is not much need for any reduction so why do you need to reduce low by 85% to go to 37".
With 4.88 diffs n 37" my ute drove fine, when I fitted the marks gears it was to low never used 1 n 2.
Try driving a loose hill climb say 35 to 45 degree incline that is 50m to 100m long with real low gearing n see how far you get before you run out of revs, I would even consider the 27% gears for 37"tyres n run 4.6 diffs you only need enough reduction to take the load off clutch n let the motot work near idle
Just my opinion all depends on your driving style

So what's your advise for someone running standard transfer gears and 4.1's with 37's. Better to go 85% and leave the 4.1 diffs (turbo diesel so goes ok most times but can be a little sluggish up big hills) or should I replace diff gears and go 43%? Obviously the latter is more expensive, so is it worth the extra expense?

Mick. wrote:

j-top paj wrote:im guessing u dont do much rock crawling?

I'm guessing your haven't seen my truck.

Yes I do and the 83% reduction gears work well with my 42s on but rockcrawling with the 37s the 83% is overkill.

Cheers Mick.

now i know who u are.... i rememeber that buildup

hows the auto with it? mine is manual so thats why i need the lower gears. the tracks i drive im constantly on the clutch

i have 85% reduction gears in my auto gu, 36in tyres, and i love them, can't imagine going any different, did have to grind quite a bit of a lobe inside the case to fit large gear in, so i don't think you could go any further than 85%.

j-top paj wrote:

Mick. wrote:

j-top paj wrote:im guessing u dont do much rock crawling?

I'm guessing your haven't seen my truck.

Yes I do and the 83% reduction gears work well with my 42s on but rockcrawling with the 37s the 83% is overkill.

Cheers Mick.

now i know who u are.... i rememeber that buildup

hows the auto with it? mine is manual so thats why i need the lower gears. the tracks i drive im constantly on the clutch

The auto is brillant when i'm running the 42s but when I was running the 37s it was changing gears heaps which was worrying me a bit bacause the autos are worth about $3000 to replace.

With the 42s on I can go down a steep hill take my foot off the trottle and it will almost come to a stop if I lock it in first. So you can imagine how low it feels with the 37s on.

If possable you should try and find someone with reduction gears in a patrol like your one and take it for a spin and see what you think. Your not around the Newcastle area are you or you don't happen to be going to tufftrucks?

Cheers Mick.

yeh im heading to tuff truck on friday arvo
you gona be there in the trol?

j-top paj wrote:yeh im heading to tuff truck on friday arvo
you gona be there in the trol?

Yes mate I will be there.

Cheers Mick.

you still have to grind to fit the 43%, not sure if its as much as 85%. not hard to do though. For what its worth if you're not absolutely confident and got the correct tools THEN GET SOMEBODY WHO DOES THEM, TO FIT. Heaps of heavy hard work. This is from a part time back yard, hack mechanic point of view.