dana 30 wont engage

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pb_beaker

NAXJA Forum User

Location

in a van down by the river

• Jul 13, 2007

• #1

since i got my jeep i have not been able to get it into 4wd. the front dana 30 wont engage. so i took off the diff cover and and shift collar cover to make sure all the gears are there, they are. then i fixed a few holes in the vacuume system. i then tested the vacuum system and at the shift collar assembly im getting about 1 in Hg. Is that enough to operate the shift fork? If so why is the collar not engaging?:huh:
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mccastlej

NAXJA Forum User

Location

Fremont, Michigan

• Jul 13, 2007

• #2

1" of mecury isn't enough vacuum. You still have a leak somewhere.

 

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mjma

NAXJA Forum User

Location

Rehoboth, MA

• Jul 13, 2007

• #3

Open the CAD cover, engage the collar, shim the shift fork with washers so that it stays engaged, problem solved.

 

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pokeyxj

NAXJA Forum User

Location

Albuquerque, NM

• Jul 13, 2007

• #4

The steel lines that drop from the engine bay tend to get rust built up inside from condesation. Run a stiff wire through them past the bend or by pass them with rubber line. Also check the vacuum motor at the disconnect. If it will not hold vacuum it won't engage.

 

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pb_beaker

NAXJA Forum User

Location

in a van down by the river

• Jul 15, 2007

• #5

so then what is the proper vacuum i need to engage the collers fork?

 

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pb_beaker

NAXJA Forum User

Location

in a van down by the river

• Jul 15, 2007

• #6

where is the vacuum motor?