4x4 thumping
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Member
Joined: May 2021
Posts: 13
Likes: 1
From: Grand Rapids, Michigan
4x4 thumping
Hello,
This winter when I would switch into 4x4 high on the icy/snow covered,, sometimes my my 4x4 would be slow to engage and when it would engage, once i was driving it would thump/jerk when I got up to 40ish mph.
Any ideas on what would cause this?
This winter when I would switch into 4x4 high on the icy/snow covered,, sometimes my my 4x4 would be slow to engage and when it would engage, once i was driving it would thump/jerk when I got up to 40ish mph.
Any ideas on what would cause this?
Member
Joined: Mar 2020
Posts: 850
Likes: 224
From: US
Sounds like your 4x4ShiftMotor is getting marginal; these are a NotoriousFailureItem,
especially if you only rarely excercise it thru the 2WHi~4WHi~4WLo cycle & a short drive in each; should be done monthly to keep+confirm it's working.
I'd go ahead & buy a new ShiftMotor in prep for complete failure to shift,
& also do a 33kMile\4Year MerconLV fluid change on the TCase, & lube the DriveShaft SlipJoint sleeve.
Click here for details on the TransferCase+Controls with part numbers.
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