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Unread 09-17-2013, 12:16 PM   #1
mfinn
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Transmission question

I have a 04" TJ that has 152,000+ miles on it and I have never had the automatic transmission serviced.
I pulled the radiator out yesterday and noticed the tranny fluid was pretty dark. Dark marroon to almost brown.
I figured I should get it serviced because along with the no service thing, I was having a issue.
While on cruise control and going up a slight hill, at 65 miles per hour, the tranny would down shift to second gear. Not all the time, but enough to bother a person.
So I called a couple places, Jiffy Lube was one of them. After explaining all the details, the guy tells me that in some cases that after a flush, some people experince transmission slipping issues.
That maybe I leave it alone and hope for the best?
Risk doing a flush, then having to do repairs?

I'd like to hear some thoughts/experinces?

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Unread 09-17-2013, 12:20 PM   #2
biffgnar
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I wouldn't do a power flush, but would manually change fluid and filter.
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Unread 09-17-2013, 12:26 PM   #3
mfinn
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Quote:
Originally Posted by biffgnar View Post
I wouldn't do a power flush, but would manually change fluid and filter.
Why?
What would the power flush do that you wouldn't want to do it?
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Unread 09-17-2013, 12:34 PM   #4
StephenGallivan
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Do the flush and filter change. The flush will not cause any damage to your tranny, all it does is change fluid. The Jiffy Lube story about slipping is a cop out, they say that to avoid lawsuits.
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Unread 09-17-2013, 12:54 PM   #5
Knuckelhead
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Quote:
Originally Posted by mfinn View Post
Why?
What would the power flush do that you wouldn't want to do it?
Sometimes problems occur after having the automatic transmission system flushed under pressure by a machine.

As already mentioned, change the fluid, don't have it machine flushed...
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Unread 09-17-2013, 01:49 PM   #6
ipleadda2nd
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I worked for Jiffy Lube while in college back in the late 90s. I performed many transmission flushes and filter replacements. As far as I know we didn't have any issues. You could do it yourself. Here's my write-up:

http://www.wranglerforum.com/f5/tran...er-120379.html
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Unread 09-17-2013, 02:01 PM   #7
StephenGallivan
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The machine does not create any pressure inside the transmission, it has a small pump that pumps fluid into the pan.The tranny's own pump does the flushing.
I've literally done over a thousand trans flushes and never had one come back.
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Unread 09-17-2013, 02:54 PM   #8
mfinn
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I'm going to find a place that will drop the pan to replace the filter and then do whatever fluid replacement is needed.
Jiffy Lube in my area doesn't drop the pan.

I have a shop that I take my major type work to that will do it, he has this fancy machine that filters the fluid as it flushes it, but he charges twice what the Jeep dealer does.
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