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94 MU 4WD problems

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94 MU 4WD problems

Postby JollyOllie » Tue Jun 21, 2022 4:53 pm

Hey, I've got a 1994 MU, I recently took her on a trip and during this the 4WD stopped engaging. It's constant hubs so they aren't a problem. Jacked up the front wheel and everything spins up through the front driveshaft, my best guess is either the transfer case or a solenoid. Went throught some deep water so maybe buggered a wire or a vac line? Any info would be appreciated. Cheers
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Re: 94 MU 4WD problems

Postby geeves » Tue Jun 21, 2022 5:00 pm

Did you do this to both wheels? Is it factory with the disconecting diff or have you just installed the drive pl;ates from the later model instead of free wheel hubs?
Sanding your knuckles before starting work can help. That way you cant skin them
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Re: 94 MU 4WD problems

Postby JollyOllie » Tue Jun 21, 2022 5:31 pm

Yeah I did it to both wheels, the left one had trouble engaging at the transfer case, everything up to there spun as far as I could tell.
Everything is factory as far as I know.
JollyOllie
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Re: 94 MU 4WD problems

Postby geeves » Fri Jun 24, 2022 9:08 am

Sounds like you have verified the diff hubs etc. Are you sure you are selecting 4wd on the lever?
Sanding your knuckles before starting work can help. That way you cant skin them
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Re: 94 MU 4WD problems

Postby turnturn » Thu Aug 18, 2022 7:24 pm

Are you asking about a 94 or a 96?
A 94 wouldn't normally have "constant hubs". A 96 would.
If it is a 96 have you checked the action of the front axle disconnect. It is a vacuum operated arrangement that disengages the front left axle.
See attached image. The stuff in the red border disconnects the LH axle.
Front Diff.jpg
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Re: 94 MU 4WD problems

Postby JollyOllie » Sat Sep 03, 2022 7:17 pm

Sorted it. Sorry for the delay, it was the vacuum controls in the front diff, the hoses were installed the wrong way somehow. So when in 2wd, the diff was connected but disconnected when 4wd was activated. And yes it is a 96 not a 94 sorry.
Thank you for all the help.
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