Transfer Case Oil additives - Yes or No?

[Shirley]

Not too sure of the model but it's the one behind the 91 3.9 litre with a fluid coupling.
Recommended lubricant is Dexron TQ II or equivalent, or even better?
It's been a while since having a Rangie, in fact the last one had a Transfer case with Straight cut gears and a 3rd Diff. A real noisy sucker to say the least. I think I must have tried every additive on the market to try to improve the operation of this box.
The later 1991 series is a whole new ball game and is quite a smooth and quiet item however some noise and fine high pitch vibration can be noticed at 110 KPH.
Have checked the Drive Flange centre nuts and they are all are tight. Prop shafts are good and no wear is apparent in the universals or slip joints.
When this noise becomes eveident some fine vibration can be felt in the Transfer Case Gear stick and I am suspect of the O/P Shaft bearing to the front Prop Shaft.
Maybe some additive may help? I have no idea......
Any sugestions please, I am in the dark with this model.
Cheers,
Shirley.....;)

[Blknight.aus]

Dexron III type oil is what your after for it

theres a few things that can cause the problems...

it might just be a harmonic of a propshaft thats just a mickey out of balance.

if you drain and flush the oil in the tcase examination of the stuff that comes out will reveal if anything is going awry in the case itself...

If your getting ally shavings then the chain is slapping the case from wear and the only real cure is a rebuild. other metals will be from the gears bearings or shafts.

[Shirley]

Hi Dave,
Yes, I was reading some info that had been posted before on the workings of the B/W Transfer case and the problems associated with the chain and gears when the vehicle has done a lot of Kms, as mine has done... (350K)
It was suggested that this situation should be adressed before it breaks by replacing the chain and gears or risk getting stuck without drive at all.
It all makes a lot of sense but I bet it's an expensive job to replace these bit and pieces.
I used to do a lot of work on the Rangies when I was a lot younger but age has caught up making it really hard to do the heavy work under the truck so I can see the specialists getting a good chunk of our savings on this one.....
Regards,
Shirley...

[PhilipA]

To answer the question, I use Castrol synthetic ATF in mine plus a Nulon engine treatment.
Teflon may not be good for motors but like Mos2 it is a good scuff and surface lubricant, and its just a chain. I couldn't find any Molyslip anywhere as it seems to have gone the way of the Dodo.The viscous coupling is a self contained unit.
Great so far at 146K, even when a workshop "forgot" to refill the transfer after doing a rear main seal.
Claimed they did not tip it after taking it out. I found about 100CC in it after doing about 1000Km,and the filler cap dirty and untouched. Thank God for the oil pump.
I will be interested to see what my splines are like when I finally do pull it apart.
By the way , a thought on your Transfer vibes. Have you checked whether your viscous coupling has seized? This is usually the first thing to fail and could cause a vibration due to slightly different tyre diameters "winding up."
You check by jacking up one front wheel then putting a screwdriver in the front UJ and turning. It should turn sloooowly with great effort.
Regards Philip A

[Blknight.aus]

whats your location. theres some people on the forum who will do some work for beers + parts (as in you provide all your own parts and their grog of choice) or know people who do good work at fair prices and might be able to get you out of the poo.

If we know where you are we can point you in the right direction. (this would be the update your profile to include your home town hint)

[rick130]

<snip>

I couldn't find any Molyslip anywhere as it seems to have gone the way of the Dodo.<snip>

Regards Philip A

pretty sure Molybond are still in business out Smithfield way. They can supply pure MoS2 in a mineral carrier oil. You used to be able to buy it in 50 or 100ml tubes.

Soluble Moly is a better EP additive, (Texaco/Caltex use it in Delo engine oil) but platelet moly is still excellent stuff as an EP additive, although I wouldn't dare use it in an Auto transmission.

[Shirley]

Something I have not tested Phillip.
Definitely the next thing to look at in the morning, thanks heaps.
I had totally forgotten about that little monster.
Best wishes,
Shirley.....

[Shirley]

Hi Dave,
I am on the Central Coast NSW in a town called Wyee, not all that commonly known but in the old days before the freeway, everyone went through it going North from Sydney or South from Newcastle or the New England....
Cheers,
Shirley..

[Shirley]

Hi Rick,
I am pretty sure you are right with the old Molybond or just adding the Molybdinum Powder to some oil and squirting it in.
I am glad you guys are thinking, I think my brain died last Thursday.....
Ta muchly,
Shirley......

[Shirley]

Hey Phillip,
I got a bit curious and jacked up the front R/H wheel and did what you suggested.
I was a bit worried at first as it wouldn't turn at all but when I looked up my housemate had her foot on the brakes.
Once the fott came off, with great pressure, the propeller shaft and front wheel began to turn. Thank God for that, I was really beginning to sweat.....
So it seems that the viscous is OK.....
Cheers,
Shirley..........

[Shirley]

Hey Rick,
did a quick phonecall and have a guy just found me some Molybond.
Anyway, although I only scored one tube for the meantime, they said they would get some more in.
The place is Budgewoi Auto Spares Ph: 02 43900211 just in case you would like some yourself...
If they give you any trouble, just tell John or Peter that Shirley said so!
Cheers,
Shirl.

[amtravic1]

My 89 Rangie t/case has done around 500.000 kms. It never has any particles in it when I change the oil. I use 75% DX111 plus 25% moreys or there abouts. It always works properly and is still quiet.

Ian

[rick130]

Hey Rick,
did a quick phonecall and have a guy just found me some Molybond.
Anyway, although I only scored one tube for the meantime, they said they would get some more in.
The place is Budgewoi Auto Spares Ph: 02 43900211 just in case you would like some yourself...
If they give you any trouble, just tell John or Peter that Shirley said so!
Cheers,
Shirl.

thanks Shirl but I'm not really into blending my own lubes too much, I try and leave it to the experts




(says he who mixes NLGI #2 moly fortified Ca complex grease and 80w-140 gear oil for the CV's :D
you can never have too much solid lubes in CV's )

[rick130]

My 89 Rangie t/case has done around 500.000 kms. It never has any particles in it when I change the oil. I use 75% DX111 plus 25% moreys or there abouts. It always works properly and is still quiet.

Ian

you may as well use a 75w-80 gear oil, cause that's roughly what you've brewed up. ;)