RIGHT FRONT BLAKE SCORIATED

[K9 EXPERT]

IWE for dummies- IWE is "Integrated Wheel End", meaning the disconnect from the drivetrain is at the wheel. The 4WD is always trying to engage due to the design, but there is vacuum that keeps it from doing so. When you engage 4WD, the vacuum is released, the IWE meshes and 4WD happens.

So having vacuum is critcal to not engaging the IWEs. Your engine makes vacuum at idle, but if you floor it, or if it's boosted- then you have no vaccum during boost. Therefore, Ford uses check valves and vacuum tank to maintain the vacuum to the IWEs during the periods when there is none.

If the check valves (or the lines going to the IWEs after the tank/valves) start to leak, then the IWEs lose vacuum and start to engage and you heard a grinding as the two parts start to mesh, but can't fully do so as there is still some vacuum preventing it.

Ford has run this exact same system since 2004 on all F150s. 97-2003 was more a robust setup that didn't fail, but it got worse MPG as more stuff was turning when not in 4WD, which is why Ford went to the IWEs.

 

[K9 EXPERT]

I will call some Ford dealers today and if I am successful getting the replacement part, I will report back. Again, thanks for everyones help!

 

[Sharpie69]

I will call some Ford dealers today and if I am successful getting the replacement part, I will report back. Again, thanks for everyones help!



Have the last 8#'s of your VIN ready for when you call around

 

[Ellison3]

Most likely the vibration you're feeling is IWE / wheel bearing related.

Depending on how bad the groove is, it's not a bad idea to replace both rotors. Notched rotors don't dissipate heat better

I’m not a fan of the drilled/ notched rotors. Have a buddy that races at the strip see some of those setups have catastrophic failures. I run the carbon ceramic rotors/ pads on mine.

Been an improvement over OEM’s so far. Had to replace the OEM’s; used OEM parts for replacement. Then the rotors took a crap on me again. All this was going on while driving on I-70 west of Denver. Was traveling as far west as Eagle, and as far east as Denver. Chalked it up to the extreme cold weather, and hot brakes from the long descents.

The OEM pads were cracked when I changed them. You can see the old OEM pads with the cracks braking material compared to the new ones. What made me check was the horrible low speed squealing. Not like braking for a stop. But, when making slow movements in a parking lot/ space. It was super loud, and embarrassing!!!

No more of those problems…

 

[Ellison3]

I would just get regular rotors. Maybe be of the ceramic type. But, if you get ceramic rotors get the ceramic pads as well.

Not very sure if the drilled/ notched rotors are the best idea for our applications.

 

[nikhsub1]

I would just get regular rotors. Maybe be of the ceramic type. But, if you get ceramic rotors get the ceramic pads as well.

Not very sure if the drilled/ notched rotors are the best idea for our applications.

Ceramic rotors for raptor? Go on...

 

[EricM]

F150 rotors are cast iron.

Pads can be organic, ceramic, caronb metallic, etc.

 

[K9 EXPERT]

I replaced the IWE and thus far it seems to have worked. I will report back if it did not. Thanks to all for your assistance……super thankful! It wasn’t as easy as the YouTube video, but the two pairs of worst words in the English language to me are, assembly required AND community property. That said I have another question, actually a couple. Prior to the 19 Raptor, I only owned Tacoma’s and BMW’s. A friend of mine that is a self professed car expert told me the Raptor’s 4 wheel drive system is completely different than a Tacoma’s. He said the 4x4 in the Tacoma only has two hubs that lock, but on the Raptor all four lock. Can anyone confirm or dispel his statement? Secondly, when the Raptor is in 4H at slow speed negotiating a normal 90 degree street curve, why is it more difficult to turn the steering wheel and why does it sound like the tires make more noise. Sorry to sound soooo stupid, but I never learned this stuff! Many thanks!

 

[scpete24]

I replaced the IWE and thus far it seems to have worked. I will report back if it did not. Thanks to all for your assistance……super thankful! It wasn’t as easy as the YouTube video, but the two pairs of worst words in the English language to me are, assembly required AND community property. That said I have another question, actually a couple. Prior to the 19 Raptor, I only owned Tacoma’s and BMW’s. A friend of mine that is a self professed car expert told me the Raptor’s 4 wheel drive system is completely different than a Tacoma’s. He said the 4x4 in the Tacoma only has two hubs that lock, but on the Raptor all four lock. Can anyone confirm or dispel his statement? Secondly, when the Raptor is in 4H at slow speed negotiating a normal 90 degree street curve, why is it more difficult to turn the steering wheel and why does it sound like the tires make more noise. Sorry to sound soooo stupid, but I never learned this stuff! Many thanks!

If your on dry pavement, you should never been in 4H. The resistance your feeling is the hubs binding. Ther steering wheel will always feel more stiff when steering if 4H as you have power going to the front wheels, but never 4H on dry pavement - your asking for trouble if you do that.

 

[EricM]

Raptor T-cases and 4WD systems have changed over the years. So it depends on the year as to how they operate.

All Raptors have the ability to lock the rear diff though, which is probably what you guys where discussing. Gen 1 trucks can lock it, and it stays locked until you unlock it. The Gen 2 and 3 trucks unlock at a certain speed. Ford is either nannying them or had too many claims of broken axles. The axle shafts tend to snap if you really give it the beans with it fully locked up. High speed 2WD drifts are pretty much the ******* **** though, so Gen 1 FTW when it comes to that.

The Gen 1 truck has no center diff or clutch in the Tcase, so the front and rear wheels turn at the same speed in 4WD. Gen 2 and up have a clutch or a diff in the Tcase so the front and rear axles can turn at different speeds, allowing 4WD "Auto".

There have never been lockers up front in a Raptor. The IWE engaging is essentially a "hub" like you'd think of locking in back in the day. Raptors have had optional torsion diffs up front, but never an option for a fully locked diff like they have as standard equipment in the rear.