Transfer case chain stretch?
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Senior User
Joined: May 2008
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From: Americas' hat (Canada)
Transfer case chain stretch?
I've got a 2010 raptor with the 5.4L that is starting to turn into a money pit. It's actually been the wife's truck since new, and 8 years of mud and air have taken its toll.
We are currently getting a metallic noise coming and going while driving. Only during a steady cruising speed. When you left off the gas, the noise instantly drops. The noise is similar to a chain being dragged on metal, or marbles rolling down a metal slide?
As far as parts or places to check, I have already replaced the following parts within the last year: both front hub assemblies, front and rear brakes and rotors, both IWE actuators, upper control arms, and had the front shocks rebuilt. Sadly, they were all changed for a reason and not just guesses. The wife is just really hard on the truck.
Could this be the chain stretching inside the t-case? If so, is there a difference in t-cases compared to a regular f-150? Or could this be transmission related? I have checked fluid levels, colors, etc on both and nothing was out of the ordinary or low. I'm at a loss on ideas. Any help?
We are currently getting a metallic noise coming and going while driving. Only during a steady cruising speed. When you left off the gas, the noise instantly drops. The noise is similar to a chain being dragged on metal, or marbles rolling down a metal slide?
As far as parts or places to check, I have already replaced the following parts within the last year: both front hub assemblies, front and rear brakes and rotors, both IWE actuators, upper control arms, and had the front shocks rebuilt. Sadly, they were all changed for a reason and not just guesses. The wife is just really hard on the truck.
Could this be the chain stretching inside the t-case? If so, is there a difference in t-cases compared to a regular f-150? Or could this be transmission related? I have checked fluid levels, colors, etc on both and nothing was out of the ordinary or low. I'm at a loss on ideas. Any help?
5th Wheeling
Joined: May 2019
Posts: 32
Likes: 0
From: Washington LA
Sounds like you may have a vacuum issue at the IWE's. May have a weak solenoid or a cracked or chaffed vacuum line. I done a few that chaffed the lines near the upper control arm next to the inner fender guard. Had a solenoid on my truck give a noise concern also. You can try running and switch into 4wd to see if it goes away or unplug the vacuum hose at the solenoid and see if the noise goes away.
Thread Starter
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Senior User
Joined: May 2008
Posts: 449
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From: Americas' hat (Canada)
I've heard the IWE noise on my 08 F150 and this doesn't not sound the same at all. I will check the vaccum lines tonight and see if I can get the noise to change switching to 4wd.
Fleet Owner
Joined: Apr 2008
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From: 0,0,1
Sound more like an issue with the pinion bearings in the rear axle.
Fleet Owner
Joined: Apr 2008
Posts: 24,316
Likes: 5,127
From: 0,0,1
About all you can do is see if there are signs of fluid leakage and disconnect the driveshaft to check the pinion for excessive play.
