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-   -   2008 F150- 4x4 clunking/grinding/not engaging (https://www.f150forum.com/f11/2008-f150-4x4-clunking-grinding-not-engaging-437804/)

MeredithB2019 01-28-2019 02:52 PM
2008 F150- 4x4 clunking/grinding/not engaging
 
Hi all, not sure if thia is the right spot for this but...

My friend has a 2008 F150 4x4 (shift knob) issues. Here is what happens:

From neutral, he will turn knob to 4L, no noises at this point.
Shifts to D, but once he gets a little speed there is a loud front end clunk and the 4x4 disengages automatically. If it is not shifted back to 2x4, it will make a grinding noise until switched back to 2x4.

Any ideas? Thanks in advance!

DarrinT04 01-31-2019 12:14 PM
you will probably get more help in the 04-08 section. this section is pretty quiet

techrep 01-31-2019 01:20 PM
Originally Posted by MeredithB2019 (Post 6071334)
Hi all, not sure if thia is the right spot for this but...

My friend has a 2008 F150 4x4 (shift knob) issues. Here is what happens:

From neutral, he will turn knob to 4L, no noises at this point.
Shifts to D, but once he gets a little speed there is a loud front end clunk and the 4x4 disengages automatically. If it is not shifted back to 2x4, it will make a grinding noise until switched back to 2x4.

Any ideas? Thanks in advance!
Could be several things.. transfer case shift motor.. bad wheel ends.. faulty t-case, don’t sound like a vacuum problem cause 2H works fine.


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