Outer Limits 4x4 Board

I was wondering if there were a online DIY How-To manual to change the drivetrain fluids.

I am refering to the front and rear diffs, transfer case and gearbox fluids.

Im only used to doing these on a AWD car, where the gearbox and front diff both drain from the same sump and refilled via the dipstick.
The rear diff is also drained and refilled via the same sump bolt.

Now when I do some reading, all of the online stuff I have read basically refers to front diff, rear diff, gearbox and transfer case being totally different unit which sounds like they have their own sump bolts?

Exampe below:

Recommendation for: FORD Maverick (1988-1993)
Manual transmission MANUAL GEAR OIL 80
Manual capacity 3.9
Transfer case MANUAL GEAR OIL 80
Transfer capacity 2.2
Front differential HYPOID 80/90
Front diff capacity 5.4
Rear differential LIMSLIP 140
Rear diff capacity 2.1
Power steering ATF TOP UP FLUID

Im getting more and more confused the more information I read.
Having a look at this being done and posted online would be highly appreciative and extremely helpful.

PS: Ive only owned my truck for just under a month, first 4wd.

Now when I do some reading, all of the online stuff I have read basically refers to front diff, rear diff, gearbox and transfer case being totally different unit which sounds like they have their own sump bolts?
correct.

front and rear diffs undo the bolts underneath..
if you stand at the back of the car, you will see a 1/2inch (if I remember) square bolt thingy in the 'pumpkin'...

put the drain plug back in, then fill it there till it flows out of the filler hole., same on front.

Buy a Gregorys manual for your car, or read one in the shop. It goes through it in there. Chapter heading-Lubrication and Maintenance.

Al is simple if you take a good look at it.

Diffs - drain at bottom and fill thru the filler plug.

G/Box - same deal exit plug at side of the box and filler same side halfway up

Transfer - same - drain bottom - filler plug opposite side half up

In all cases fill until the oil come out the filler hole (on level ground) using an oil suction pump is a big plus and less messy.

Dont over tighten plugs and use some plumbers tape on the threads to seal. Don`t use silicon as it is a pourous seal.

a quick tip is to always undo the filler plug before the drain plug. You'll see why if you drain all the oil out then find you cant get the filler plug out for some reason!!!!

one recomendation i have, is dont buy one of those cheap $20 pumps to put oil in, spend some cash as you will be using it a few times,

cheap pumps make pumpin thick oil very time consuming.

hi guys i am in a similar position to this.

new truck (89 gq patrol). i have no dramas taking the oils out or refilling, but i am after recomoendation on which oils to use?

the 4x4 is not used for serious offroad, just sand and towing etc, as well as daily driving.

Cheers
Stew

toy77 wrote:hi guys i am in a similar position to this.

new truck (89 gq patrol). i have no dramas taking the oils out or refilling, but i am after recomoendation on which oils to use?

the 4x4 is not used for serious offroad, just sand and towing etc, as well as daily driving.

Cheers
Stew

Buy the service manual.

That, or the little book that lives in the glovebox also has oil type information.

Or the GQ bible will most likely have it.

bogged wrote:Now when I do some reading, all of the online stuff I have read basically refers to front diff, rear diff, gearbox and transfer case being totally different unit which sounds like they have their own sump bolts?
correct.

front and rear diffs undo the bolts underneath..
if you stand at the back of the car, you will see a 1/2inch (if I remember) square bolt thingy in the 'pumpkin'...

put the drain plug back in, then fill it there till it flows out of the filler hole., same on front.

Square bolt thingy in the 'pumpkin'

Love this discription

ozy1 wrote:one recomendation i have, is dont buy one of those cheap $20 pumps to put oil in, spend some cash as you will be using it a few times,

cheap pumps make pumpin thick oil very time consuming.

tell me about it. i should have got one of the big pumps and a 20litre drum.

toy77 wrote:hi guys i am in a similar position to this.

new truck (89 gq patrol). i have no dramas taking the oils out or refilling, but i am after recomoendation on which oils to use?

the 4x4 is not used for serious offroad, just sand and towing etc, as well as daily driving.

Cheers
Stew

i use penrite oil on my 92 SWB mav, there was a little while ago a similar question asked about oils and most said penrite, have a search for the link.

mine is on straight gas and running twin ARB lockers and used for hard offroading.

i use:
HPRGAS for engine
80W/90 Hypoid gear oil for g/box and transfer
85W140 Limslip diff oil for diffs.