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View Poll Results: Change tranny fluid yea or nay
Yes, time for a change 15 75.00%
You may open a can of worms, don't do it 2 10.00%
Wait till at least 100K 3 15.00%
Voters: 20. You may not vote on this poll

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Old 04-12-2008, 02:03 PM   #1
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Default Transmission - 75K miles

OK, I just hit 75,000 miles, should I change the fluid in my tranny?
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Old 04-12-2008, 03:10 PM   #2
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How'* your trans acting? How'* the fluid look?

If no transmission troubles and the fluid looks a good red and no burnt smell (or maybe a slight hint of brown), go ahead and change it without worry.

If you're having severe slippage / shift problems or the fluid'* badly cooked (especially with black particles), don't bother, trans is nearly dead anyway.

If somewhere in between, it'* your call.
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Old 04-12-2008, 03:19 PM   #3
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Could ya post your year and trim level in your signature? Otherwise, we don't know what you are driving.
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Old 04-12-2008, 05:57 PM   #4
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You should have done it at least twice by now. I changed my filter and pan fluid a few months back, at 30K. The following week I took it in for to have all the fluid fully flushed.

To my surprise magnet in the pan looked 100x'* better then the pan magnet in my truck with the same mileage. When I did this service to my truck I did it the other way, having it flushed first then I changed the filter 1K miles later myself. The magnet was pretty ugly compared to the Bonnie'*

Here'* what the magnet in the truck looked like at 31K and after having the fluid flushed at 30K. The magnet in the Bonneville was really clean (sorry no picture)
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Old 04-13-2008, 10:01 PM   #5
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Quote:
Originally Posted by Bonneville92V688
Could ya post your year and trim level in your signature? Otherwise, we don't know what you are driving.
2004 GXP 4.6 Northstar.
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Old 04-13-2008, 10:06 PM   #6
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Please put it in your signature for future reference.

You have the 4T80E fyi.

It is a good rule of thumb to make it a habit to have your transmission'* filter changed and it be flushed every 30,000 miles. Mine only has 37k and already is acting up because I haven't done it.

On a side note, jees, i remember when the GXPs first came out..and now they're already getting near the 100s
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Old 09-03-2008, 10:48 AM   #7
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Is anyone draining the pan some by pumping out thought the dipstick tube or cooler line
to reduce the amount of ATF in the pan before removing it (less of a mess ) ?

Adding a bottle of Lubegard Red at the refill seems to make the ATF last a little longer . Many transmission shops use it when they install their rebuilds . It is not a magic fix or substitute for regular maintenance. Also, adding an inline filter ( such as the Magnafine available at Automatic Transmission Parts & Transmission Coolers, Makco Distributing ) is not a bad idea ( Webshots - Full Size Photo) either but remember that it has to be changed on a regular basis .

-Thanks

Last edited by rkpatt; 09-03-2008 at 10:55 AM.
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