think its ok to use royal purple's synchromax in the transfer case?

 

75-90 synthetic is a prefered lube for any chain drive. yuor transfer case will love it. i use 90-140 synthetic gear lube in the primary chain drive in my harley,,the chain loves it as much as the clutch does.

 

well the bottle says its ok, just wondering if anybody here has had any experience with it in a t-case?

 

I just changed mine in a 04 and I used mercon 5 synthetic. Easy to do just make sure you have the correct funnel to refill it. ( i have several types but none would work thank god for the other car to run to the parts store for the correct funnel )

 

WOW STAY AWAY FROM MY T CASE! The T case requires the use of ATF not gear lube. Mercon/DexronIII is the correct oil for the T case. Also for the user that put Mercon V in their T case while it may not hurt it right away the additives in mercon V are tough on nickel plated parts like the chain pins. This is why Mercon is required.If you want to use Royal Purple products their Max ATF meets the Mercon spec and would be a good choice for the T case.

 

I am with gas hog on this one.

Use a good Mercon ATF and you will be fine.

 

Mercon V is reformulated now and is used in place of Mercon. Ford stopped using Mercon about 1 1/2 years ago and you can't even buy it now. I just did my tranny and t-case 2 months ago is how I found out.

 

Here is what is recommended in the owners manual for a 2006 SRW:

Front axle: Motorcraft SAE 80W-90 Premium Rear Axle Lubricant

Rear axle: Motorcraft SAE 75W-140 Synthetic Rear Axle Lubricant

Brake fluid: Motorcraft High Performance DOT 3 Motor Vehicle Brake Fluid

Power steering fluid: Motorcraft MERCON ATF

Transfer case fluid: Motorcraft MERCON ATF

Manual transmission fluid: Motorcraft MERCON ATF

 

Can't buy Mercon ATF anymore???

I can buy Mercon ATF fluid all day long at Wal-mart.

 

I'll check what's in my garage that I bought from the Ford dealer when I get home. (I had a couple of extra quarts) That's where I got my info from. Also, checked on google. Not sure what Wal Mart is selling, I didn't think they sold Motorcraft Transmission Fluid. I was trying to go back as close to what was speced in my owner's manual as possible. ON quick check, I just called that same dealer, he reitterated, Ford no longer has Mercon, only reformulated Mercon V. This reformulated Mercon V is for both Mercon and Mercon V uses. He said whater is at Walmart my be the old Mercon formula, but it is no longer being manufactured and hasn't been for over a year.

 

https://www.ford-trucks.com/tsb/full...hp?tsb=06-14-4

TSB 06-14-4 MERCON ATF IS BEING REPLACED BY MERCON V ATF AS A SERVICE FLUID.

ISSUE:
MERCON® Automatic Transmission Fluid is being replaced by MERCON® V as a service fluid.

ACTION:
Beginning immediately all automatic transmission / transaxle applications requiring MERCON® can now be serviced using MERCON® V or MERCON® Automatic Transmission Fluid or dual usage fluids labeled MERCON® / MERCON® V. After July 1, 2007, MERCON® Automatic Transmission Fluid will no longer be manufactured, therefore, availability of this fluid will only continue for however long it takes to deplete what remains in inventory.

SERVICE PROCEDURE


Service automatic transmissions requiring MERCON® with MERCON® V or MERCON® Automatic Transmission Fluid or dual usage fluids labeled MERCON® / MERCON® V

For proper fluid application on current and past model vehicles equipped with automatic transmissions / transaxles refer to the fluid usage chart. (Figure 1)

CAUTION: AUTOMATIC TRANSMISSIONS / TRANSAXLES THAT REQUIRE MERCON® V SHOULD STILL ONLY USE MERCON® V OR DUAL USAGE FLUID LABELED MERCON® / MERCON® V.



CAUTION: MERCON® SP, MOTORCRAFT PREMIUM AUTOMATIC TRANSMISSION FLUID AND MOTORCRAFT M5 ATFS ARE UNIQUE FLUIDS AND MUST BE USED IN APPLICATIONS RECOMMENDING THAT PARTICULAR FLUID. USE OF ANY OTHER FLUID MAY CAUSE REDUCED FUNCTIONALITY OR TRANSMISSION DAMAGE.

 

its funny how the transfer case in my 1980 3wd 350 psd ran so much cooler when i put the syn gear lube in it. same wiith the stick shift trans. same with my harley primary. my electronic snap-on temp meter tell me so. dont worry about me messing with your trnsfer case,,i just mess with my equipment. ill continue nto run gear lube in transmissions and chain drives because they are the lubes that these things need. not atf.leave that in slush boxes and power steering .

 

You can still buy all the Mercon ATF that you could possibly want. No, It's not Ford's Brand, But it still meets the specs for Mercon/Dexron III transmission fluid.
Joe

 

Do they include a 2.9:1 planetary gear for LOW? The transfer case in the '99-04 Superduty, at least, and I believe the newer ones, has a LOW gear setup that is similar to those in an automatic transmission.

While the rest of the transfer case might be OK with the gear lube, those planetary gears (and their thrust and bearing surfaces) are not going to be happy.

 

Those 1980 3wd Power Stroke trucks are very rare