IWE CV axle help

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Badgertits

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Started getting a tapping noise in my drivers front wheel well area that got progressively worse to where I could feel it in the steering wheel & floorboards, would come & go - seemed to be worse in colder weather, Mostly noticeable @ lower speeds, would hear/feel it much more when the steering wheel was turning left or right vs going straight ahead- made the noise in 2Wd or 4A but seemed to stop in 4H

Noise got progressively worse thought to try & change the IWE check valve out w/ a new one but never did it b/c the original was on very very tight & I didn’t wanna break anything.

Last weekend started hearing what sounded like air hose blowing form under hood pulling WOT on hwy, drove it easy since- thought was a turbo pipe loose but truck still seems to be pulling hard & making boost but got the following codes:

P0455 evap system large leak
P0A5B generator current sensor circuit low
P144C evap system purge flow performance under boost

Bring it to dealer to diagnose have had it all day- call & tell me they recommend replacing intermediate shafts (huh? Do they mean CV axles??) & hubs & alignment to the F’n tune of $5k- Faaaaahhhhkkkkkkk YOU!!!!

I ask- “did your tech do a leak/smoke test to determine where the vacuum leak was? I know the hub may be bad from the grinding sound- but what about the air noise/leak that JUST cropped up & wasn’t present when the axle/hub/IWE sound was?” And also “what about just capping off the IWE system altogether as an option?” - crickets

And they wanna charge me a $250 “diagnostic fee” - for F’n what!?!?!? Yeah I could order new front CVs, hub/bearing assemblies & either new IWE hubs or IWE delete hubs & just get em installed by an independent shop or myself, I’m savvy enough to guess that throwing those front end parts may do the trick…..or maybe NOT which is why I brought it to a dealer to actually determine the cause.

From what I can tell? I could order new axles, hub/bearing assemblies & either a new set of IWE hubs or IWE delete hubs….for less than $1k delivered to my door….so even if this ******* dealer is 100% correct in their diagnosis, how does the other $4k+ in labor & an an alignment pan out!?!?!?

So frustrating.
 
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