Outer Limits 4x4 Board

hey all. i have a 94 ti auto patrol, what diff ratio should i fit?? 4.6 or 4.88??
i have new 35`s & 4 speed auto with lock up converter, always kicking down at the wrong time on highway...
cheers daz
newcastle

4.6's will bring your auto with 35's back down to near perfect factory gearing.

Jes

4.6s as you can get them genuine, 4.88s are only aftermarket and are not needed for 35s, 4.6s will bring gearing to standard

dont worry about, better on the highway as it is, just pull some gears into the transfer case

hi, 4.6's will allow you to run 35's really nicely. your speedo will be accurate and most of all if you use a genuine based gear(s) then your strengh still remains Nissan (strong) and at the end of the day i have a set available like many others... 4.88 aren't all that common because of there weakness history. 4.6's and transfer case gears maybe.. your call


cheers

Luc

FOR A 4.2 AUTO THEY CAME OUT 3.9 RATIO, 4.6 WITH 35 WILL CAUSE IMPROPPER GEAR CHANGING, AND YOUR SPEEDO OUT, THE CLOSEST RATIO FOR YOU IS 4.3. THIS WILL BE GOOD FOR YOUR NEEDS

giantracing wrote:FOR A 4.2 AUTO THEY CAME OUT 3.9 RATIO, 4.6 WITH 35 WILL CAUSE IMPROPPER GEAR CHANGING, AND YOUR SPEEDO OUT, THE CLOSEST RATIO FOR YOU IS 4.3. THIS WILL BE GOOD FOR YOUR NEEDS

easily rectified! if your happy to run 35's on 4.3s fair enough. for the sake of a couple of extra bits id much rather run 4.6's regardless of 3.9's.


cheers

Mine runs 4.6's with 35" claws and drives nicely

listen to giantracing, he is correct here.

What about GU4.5 Manual? (On 35's)

They are 4.1's I think? Therefore, 4.6's are the go?

the auto's generally come out with 4.1, the 5 speed manuals come out with 3.9's, maybe there is some differences as they rolled them out aswell.


35's and freeway driving dont mix when you have the origional gearing and origional engine , or most any engine actually probably bar a 7.3 litre turbo diesel.
when you put on 35's the torque is in the wrong place, and its not enough to push the vehicle at freeway speeds. it will drive like a pig.

because the 35's look so horney and you love the way it you will accept the way it drives.

Jes

jessie928 wrote:the auto's generally come out with 4.1, the 5 speed manuals come out with 3.9's, maybe there is some differences as they rolled them out aswell.

Jes

Both my GQ Auto's, an '89 and a '93, were 3.9 gears. My mates '90 Manual was a 4.11. All with 4.2 petrols.

thats some weired arse shite

the auto's i have pulled down ( all being SWB's) have been 4.1 and the 5 speeds ( also SWB's) have been 3.9s. I have sold centres from these vehicles as marked also?
I always thought the higer gears made up for the shitty first gear in the auto.

hmmmmmmm,
maybe i am remembering the exact reverse, could be possible!

Jes

thanks for the ideas,i found a thread on 4wd monthly stating the plate on the rh firewall has hg39 or hg46 or gh37,this refers to hypoid gear 3.9. mine is hg39....
also 2.8 gq & qu run 4.625 but are hard to get..
$600 bucks each diff set has been the best price so far,& thats trade price.
cheers all
daz
newcastle

giantracing wrote:FOR A 4.2 AUTO THEY CAME OUT 3.9 RATIO, 4.6 WITH 35 WILL CAUSE IMPROPPER GEAR CHANGING, AND YOUR SPEEDO OUT, THE CLOSEST RATIO FOR YOU IS 4.3. THIS WILL BE GOOD FOR YOUR NEEDS

mine came with 3.9s and the speedo was correct for 31x10.5s, now i have gone 4.6 and the speedo is out by about 2 percent with the 35x11.5 simex and was correct with the 35x12.5 tyres, so i dunno about that. although mine is manual gearbox.

my 4.5 p auto gu has 3.9 gears , off road with the marks gears all is good but on road it struggles to hold top gear ( by struggle i mean not in unless dead flat and no wind) , im going 4.6's soley as it will be in top gear earlier and wont kick down on the slightest hills and will tow better and i dont think it will rev to high on the hwy to be an issue as i would have gain an extra gear

whats wrong with the 4:88s?
im thinking of putting some in mine soon.

took my GQ for a drive yesterday, and speedo checked it. it is under by 10% with 4.6 and 35" Kelly AWR's. i was sitting on 110 to be doing 100kp/h.

Standard it was 31.5 - 32" and 3.9 gears.

4.6 IT IS THEN
CHEERS
ALL
DAZ
NEWCASTLE...

PS; ARE ALL THE BODY MOUNT BOLTS THE SAME LENGTH ??
FOR FUTURE BODY LIFT "2"..

HI 75 wrote:PS; ARE ALL THE BODY MOUNT BOLTS THE SAME LENGTH ??
FOR FUTURE BODY LIFT "2"..

nope

the front 8 are, the rear 2 are different.

ive got a mate with a worked 350 & turbo 350 auto in a gu2.8 running 4.6`s,
he needs 3.9`s,
we are doing the sway this weekend at my workshop.
are the housings the same & axle spline the same???
i`ll let you all know how this goes,
i should save a heap of fuel going the fraser isl from newcastle with the changed ratio this xmas...

Looks like the factory 4.6's are a good option.

Does anyone have any good experiences with after market 4.88's ?

if you like replacing diff centres every 3rd weekend 4.88 are for you .
the pinon gears are very weak, they tear the teeth off. you are better doing transfer case gears , that way your final drive is left alone(2wd). only low gear lower................

I reckon he should go with the 5.12's myself.

i know a few guys either currantly running 4.88 or have in the past and neither that i am aware has had an issue with them , and yes they do drive there vehicles hard

I'm talking petrol carbie with 35's. Might be a little week for bigger wheels and a V8 or big turbo diesel

Which stocky runs 4.6's???????? if shorty gq's run I think 3.7's, LWB 4.2 GQ's run 3.9 and 4.1's, GU LONG wheel Base DX's run 4.1 and the coil, leaf spung utes run 4.3 which ones run 4.6's? 2.8 d or the ZD30??? whats does the 3L 6cylinder petrol run???

Someone should make a list dam it!!!!!

anyway I'm off to buy a turbo, stuff the ratio's....2 many teeth to brake

2.8 d run 4.625 standard ratio

2.8 d run 4.625 standard ratio