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So the hyperflash only occurs on the dashboard, correct? The actual taillights don't?

So the light bulb for the brake/turn signal position emits two brightnesses of white light? I'm seeing others install the Lasfit units that emit red.

No, change the Ptu oil as soon as you take delivery from the dealer. 10 ounces short is not good.

Don’t forget about towing.

When I found the PTU oil low and lots of debris on the magnetic plug from the factory (5400 miles). And the RDU magnetic drain plug with even more debris. I also see a alarming trend & am also worried about the condition of the trans fluid level & quality. I am going to be changing it this month!

Has anyone let Ford know about the shortage of oil people are finding in their PTU’s?

The hardest part for me was squeezing out the cold oil from the bottle. I placed bottle in very hot water to thin it and it was easier. I swapped to bottle top from the RDU oil bottle and put a small hose on the tip. The job is not that bad.

My PTU was under filled from the factory by about 53%. Not good! Luckily I heard others discovered the same. So as soon as I heard, I changed it. I think it was YT. ~5400 miles on truck. I’ll bet RDU will be under filled as well.

I agree. 2 rather different oils.

I was inquiring about the PTU and whether a friction modifier would compromise the specific functionality of the PTU. I highly assume they the RDU does require a friction modifier.

A bottle of what? The MC or equivalent without the FM?

I seems to me that the PTU does not require friction modifiers because the Motorcraft 75w85 bottle states that a friction modifier may need to be added.

A different size tire on an FX4 will not damage the AWD system. if anyone thinks it will, please explain to me in technical terms how it will be damaged.

Yes, quite I bit of conflicting info in here. I agree that 75w85 is called for, 75w90 will work and 75w140 in incorrect. But what about finding a cheaper alternative that does not have the friction modifier additive for limited slip applications? the Motorcraft oil does not have this package...

Yes, the Tremor does not have the tow package. Not the larger coolant radiator or the transmission fluid cooler. Additionally, you may not notice a difference using 87 or higher octane, say if the weather is cooler. Difference will only be noticed at high loads/higher intake temps when engine...

Oil 2 oil catch cans was my 1st must do mod. Do a search on what all that oil does to the intake valves. It’s really bad.

Hello everyone! I can attest that the 225/75r17 Hankook Dynapro AT2’s do indeed fit my FX4 without a front lift without any pinch weld manipulation. Your welcome!

So just to clarify. Having a wider tire isn't so much a problem at the pinch weld? And a front lift doesn’t help with the pinch weld contact ? It’s the increased tire diameter that is the only culprit to the pinch weld rubbing?