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post #1 of (permalink) Old 03-26-2001, 08:11 AM
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Dana 20 & T150 vent ?

Where is the vents for the Dana 20 transfer case and the T150 transmission? I recently changed the oil in both and it was very mud like. I would like to extend the vents up higher, but wasn't exactly sure where they are. The Dana 20 looked to have something right above the rear output shaft, but it was pretty big. I couldn't see anything on the trans. Who has done the extend vents on these parts?

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post #2 of (permalink) Old 03-26-2001, 09:41 AM
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Re: Dana 20 & T150 vent ?

never owned a T150.. but the dana 20 is right where you said it was.. i put a brass fitting in there.. and then ran a line up.. right above the rear output..

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post #3 of (permalink) Old 03-26-2001, 09:50 AM
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Re: Dana 20 & T150 vent ?

Where did you get the brass fitting? Do you remember any part numbers?

1978 CJ-5 '<font color=red>Cherry Bomb</font color=red>', AMC 360, SOA, 33x12.5
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post #4 of (permalink) Old 03-26-2001, 09:59 AM
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Re: Dana 20 & T150 vent ?

The T-150 vent location is very similar to the Dana 20. It is near the top of the case, and just behind and to the left of the shifter handle.

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post #5 of (permalink) Old 03-26-2001, 10:05 AM
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Re: Dana 20 & T150 vent ?

They're on the top of both, and the vent on the D20 is on the rear output. If you get a 1/8" NPT tap, you can pull the vent out, it's a press fit, tap the hole, and thread a fitting in. Grease the tap or use a vacuum cleaner to catch any filings. Put some hose with the fittings and you're all set. I tied all of mine together, so they run to a common high point. You can do all the vents for $10-$15 in material found at any local hardware store.

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