Transmission oil keeps blowing out of vent tube

20

Asked by Stormy Aug 15, 2010 at 08:58 AM about the 1996 Chevrolet Blazer

Question type: Maintenance & Repair

I have a 1996 Blazer 4wd and transmission oil keeps blowing out the vent tube. When I bought the Blazer the transmision was over full so I drained a quart out of it and it seemed to stop. Now oil is blowing out vent tube again. Any suggestions?

4 Answers

75

Same thing happened to mine last summer. Follow the vent tube down to the transfer case and there will be a check valve with three tubes going into it. This check valve is defective. Unfortunately you need to drop the transfer case out in order to fix it. I had to replace the check valve and the gasket between the tranny and transfer case. Good luck

7 people found this helpful.
30

had transmission line come off while driving put line back on put 4 and a half quarts in show on stick but driving1 mile dose not show on stick should i change the transmission filled ty

1 people found this helpful.
140

I had to same problem. I'm not trying to spend a lot of money on an old vehicle so what I did was take a 3/8 copper tube and bet it into a U. Then I connected one side to the overflow tube and put the other end in the fill tube. Works great, no more leak. The only question I have is if the check is malfunctioning will it affect the trans at some point. So far so good.

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