d300 is leaking out the vent tube after 700r. - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 07-30-2003, 10:28 AM Thread Starter
 
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d300 is leaking out the vent tube after 700r.

My tcase is leaking out the vent tube. I got my 700r/d300 adapter from Novak. It looked a little clocked when I put it on, but I called them a couple weeks and they said it wasn't. I called them again yesterday and they said it is clocked about 12 degrees. I assume that this means I had too much fluid in it. A guy at Novak suggested about 1 3/4 quarts. I drained it last night and got over 2 qts out. I put about 1 3/4 back in. (Mobile 1 synthetic 50w) I drove it to work this morning and it still looks like its leaking. Here is what I know/think.

1. It wasn't leaking out of the vent tube before I did the swap. (It was leaking out of the front output shaft, but I replaced it while I had it off.)
2. The tcase doesn't seem to be making any noise.
3. The vent tube runs about 1/2 way up the fire wall.
4. The engine is tilted toward the back.
5. I replaced the shift rod seals 2 weeks ago because they started leaking.

The only place I see oil is on the vent hose. (It runs back down the outside). It drips from the front Ujoint which I assume is dripping from the hose.

Does anyone know how much fluid I should have in a d300 that is clocked 12 degrees (about 1/2 way to flat)

Any other suggestions?
Thanks
Kirk
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post #2 of (permalink) Old 08-08-2003, 03:54 PM Thread Starter
 
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Re: d300 is leaking out the vent tube after 700r.

I guess i will post an update since NOBODY even replied.
[img]images/graemlins/chair.gif[/img]
Hopefully this will help someone someday.

I found out that the nut on my front output shaft was lose and thus causing oil to leak out on the nut, run down to the u joint, then flip up on the vent hose. There was no oil running down the front of the tcase, so I didn't think it was coming from the front output shaft. It was, just by the nut, not out the seal. Obviously a very easy cheap fix - tighten the stupid nut.
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post #3 of (permalink) Old 08-09-2003, 12:19 AM
 
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Re: d300 is leaking out the vent tube after 700r.

That nut should have been torqued down in the first place and should not have come loose.You are lucky it leaked and you check to find out why. Saved at least a driveshaft and possibly a life.The loose nut should not have caused it to leak,Except it would allow the output shaft run eccentric in the seal.
If the seal is not seated all the way in it will also leak. The seal seats recessed in the flange not flush with the lip. I used too large a socket one time to drive in the seal and although it sounded like it was seated it was the socket seating against the flange lip. YUP.... it leaked...took it apart drove the new seal in ALL THE WAY ....LEAK FIXED. Make sure you torque those nuts down, and don't re use them...At least thats what they say...
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post #4 of (permalink) Old 08-10-2003, 10:00 PM
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Re: d300 is leaking out the vent tube after 700r.

You also should have a rubber seal that is on the end of the output shaft behind the nut
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