Outer Limits 4x4 Board

Hey guys ... another question

Ive got some 33"s that I use to playing with, so havent been bothered about speedo correction etc etc. But would like to have a similar sized tyre for road use instead of my 31's. Ive been told my mav runs 3.9 diffs, and am wondering if theres something I could do to correct the gearing or even just the speedo for bigger tyres ?

Thanks

If your mav runs 31's standard and has 3.9s

then the upgrade to 33's will require 4.1 diff ratios if you want to keep drivability the same (expensive option)

If you're happy with drivability with the 3.9's and the 33's then just get the speedo changed. I think one of the forum members has the information on what speedo teeth to use to have changed on the gearbox to allow for correction of the speedo with the 3.9's using 33's

Regards
TOM

What sort of money would ya think I would be looking at for 4.1's ?

Draven wrote:What sort of money would ya think I would be looking at for 4.1's ?

new or second hand?

also genuine or factory?

you have 4 options

4.1's are a bloody common gear.. availalbe in nearly every patrol out there.

See if you can find yourself a pair of diffs with 4.1 gears and whack em under rather than fiddling with the cw&p on ya diffs unless you're firm on keeping ya diffs as the cost of the 2nd hand diffs with 4.1 gears will just be about the cost of doin the cw&p conversion from 3.9s to 4.1's

Have a serious think about what you're doing.

Do you plan to lift the truck up further at any stage in the future? will you be goin 35's at some stage?? etc??

Consider those things b4 u fork out your hard earned money??

to go 35's you'd need 4.6 ratios .. more money down the drain if you already spent em on 4.1's.

Why not tel us what your plans are..

Will you do a lift? yes or no?

Will you go 35's ? yes or no?

Or 33's on road and 35's offroad??

Good questions to be answered b4 we all can give you a proper assessment of your situation on what gears to be used as few people i know run 33's using 4.3's and runnin 35's offroad etc.

Different situation for myself as i run factory 4.6's on 36 swampers

TOM

Draven wrote:...and am wondering if theres something I could do to correct the gearing or even just the speedo for bigger tyres ?

Thanks

You can buy the gear for the speedo that corrects it, around $20 from Nissan. You change the gear at the gearbox end of the speedo

Bazzle knows little more about it, hes done it before.

bogged wrote:

Draven wrote:...and am wondering if theres something I could do to correct the gearing or even just the speedo for bigger tyres ?

Thanks

You can buy the gear for the speedo that corrects it, around $20 from Nissan. You change the gear at the gearbox end of the speedo

Bazzle knows little more about it, hes done it before.

bazzle, u got any more information on this please?

hottiemonster wrote:bazzle, u got any more information on this please?

search archives its been done before

An alternative way of correcting the speedo for different sized tyres, is to remove the instrument cluster from the dash. Remove clear perspex cover and carefully curl the flexible speedo face forward. Behind this face is a small rectangular (10mm x 10mm) box with a phiilips screwdriver head. Carefully drill a 4mm dia hole though the top of the instrument cluster to access the box. Adjust one way or the other and calibrate with a GPS. Takes a few goes to get it right.......but doesn't cost you anything from Ni$$an.

Cheers
Mitch

GQ TROL wrote:An alternative way of correcting the speedo for different sized tyres, is to remove the instrument cluster from the dash. Remove clear perspex cover and carefully curl the flexible speedo face forward. Behind this face is a small rectangular (10mm x 10mm) box with a phiilips screwdriver head. Carefully drill a 4mm dia hole though the top of the instrument cluster to access the box. Adjust one way or the other and calibrate with a GPS. Takes a few goes to get it right.......but doesn't cost you anything from Ni$$an.

Cheers
Mitch

of if you want something that takes 10 mins first go, instead of hours adn cant bollox it up give nissan $20

Try this
GQ SPEEDO DRIVE GEARS . The following has worked for me in a few combinations. They are pretty close approximations in others .
It also shows by looking at gear No (ie 17) how close ratios and tyre sizes are to normal.
Normally 2350 is 100kph ie. About 43kph/1000rpms in 5th.
You can check your speedo on the highway using K markers. At 100kph it takes 36 seconds. For 5 ks its 180secs or 3mins.

Diff ratio Tyre size Speedo gear

3.9 31 16
33 15
35 14
37 13
Description Pinion-Speedome
4.1 31 17
33 16
35 15 Part Number 32703 - 31G 17
37 14

4.375 31 18 Change last 2 digits for gear you need.
33 17
35 16
37 15

4.625 31 19
33 18
35 17
37 16




Bazzle

I've just bought some 4.6's to correct for the 35's. They and the air lockers are going in next Monday.

You can have my 4.11's for $200+ postage , if you're interested.

If interested, PM me.

Sooo how do you identify the diff ratios without dropping it out and counting teeth?

For example, mine is an 88swb petrol, auto. I always thought it had 4.1s .

Rod

4.3's are a good compramise. Good with 35"s & 33's. 4.6's are too low for 33's. 35's 4.6's are better than 4.3's, but 4.3's still good. Damn i wouldn't want to drive one with 33's & 4.6's. Just my opinion though jsut from having mine with 4.3's with 33' AT's & 35 Claws

rOd wrote:Sooo how do you identify the diff ratios without dropping it out and counting teeth?

For example, mine is an 88swb petrol, auto. I always thought it had 4.1s .

Rod

compliance plate will have HG41 HG39 or HG43 thats 4.1 3.9 or 4.3

bogged wrote:compliance plate will have HG41 HG39 or HG43 thats 4.1 3.9 or 4.3

Thanks bogged.

Mines actually a 3.9

rod

rOd wrote:

bogged wrote:compliance plate will have HG41 HG39 or HG43 thats 4.1 3.9 or 4.3

Thanks bogged.

Mines actually a 3.9

rod

autos are usually 3.9

bogged wrote:

rOd wrote:

bogged wrote:compliance plate will have HG41 HG39 or HG43 thats 4.1 3.9 or 4.3

Thanks bogged.

Mines actually a 3.9

rod

autos are usually 3.9

mines 4.1 & auto

The above post is a little difficult to interpret / misleading. I have added an extra column to make it painfully clear for all.

BTW... if anyone needs a 31G17 drop me a PM... I ordered one to correct my 4.1 / 35 combo.

Tyre size (in) / No. Teeth / Nissan Part Number

3.9 Diff Ratios:

31 / 16 / 31G16
33 / 15 / 31G15
35 / 14 / 31G14
37 / 13 / 31G13

4.1 Diff Ratios:

31 / 17 / 31G17
33 / 16 / 31G16
35 / 15 / 31G15
37 / 14 / 31G14

4.375 Diff Ratios:

31 / 18 / 31G18
33 / 17 / 31G17
35 / 16 / 31G16
37 / 15 / 31G15

4.625 Diff Ratios:

31 / 19 / 31G19
33 / 18 / 31G18
35 / 17 / 31G17
37 / 16 / 31G16

DirtPigs wrote:The above post is a little difficult to interpret / misleading. I have added an extra column to make it painfully clear for all.

you were that bored?
good work

bogged wrote:

DirtPigs wrote:The above post is a little difficult to interpret / misleading. I have added an extra column to make it painfully clear for all.

you were that bored?
good work

Nah, just once bitten... and wanted to help others so that they don't make the same mistake that I did.

Does anyone know how many teeth are on the spur gear on the rear output shaft? I want so work out the speedo spur / pinion ratios more accurately.

Red Rover wrote: 4.6's are too low for 33's. Damn i wouldn't want to drive one with 33's & 4.6's.

As an MK driver ive got 4.6's and 31's... it aint that bad aslong as you dont want a top speed over 125, cruising at 110 is pushing it a little, does 100 in 5th fine tho. 4.6's and 33's would have been fine i thought

Do those speedo gears apply to the GU?

okay, who has driven a GQ patrol with the TD42, with 33" tyres ans 4.6 diff gears, as this is what ill be running some time soon, i will be looking at 35's late this year.

ozy1 wrote:okay, who has driven a GQ patrol with the TD42, with 33" tyres ans 4.6 diff gears, as this is what ill be running some time soon, i will be looking at 35's late this year.

I am driving a GU TD42T with 285's and 4.88 ratios (just done a conversion from 2.8 tdi to 4.2 T and haven't changed the ratio's yet). She has some real get up and go but first and second are very short. Revs at 2600 RPM in 5th at 100km/h or 3000rpm at 117km/h. Fuel consumption goes way up when on the highway at 100km/h.

robbie wrote:

bogged wrote:autos are usually 3.9

mines 4.1 & auto

:P

Just buy a gps it has other functions as well, and you dont have to get under the car

berazafi wrote:Just buy a gps it has other functions as well, and you dont have to get under the car

and its nearly always accurate!

Just to add to info on diff ratios per model... my manual has the supplement for post-Dec 92 Patrols and Mavs and states...

All models have a final drive ratio of 4.111:1 with exceptions:
- Patrol ST & Ti Manuals are 3.9:1
- 3L Models 4.375:1
- Maverick XL 3.9:1 (where my Mav falls)
- 4.2L Autos after Dec 92 3.9:1
- Leaf spring Cab Chassis 4.375:1

And standard 4.111:1 LSD's on:
- Maverick XLT
- Patrol Ti
- Some Patrol ST's

4.111 XLT 89 and locker here.