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Old 05-21-2015, 11:54 PM   #1
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Ok, I changed the oil incorrectly on my 02 Suburban. It was late, i was tired and rushing. Here is what i did. I have drive about 30 miles, 8 miles each, with at least 3 hours between, in some cases 24 hours.

1. Drained the TRANS fluid, and about 1.5Q came out.
2. Replaced oil filter, about 1.5Q came out.
NOTE: I did not drain the oil pan, accidentally the trans fluid.
3. Filled the oil with 6Q.
4. Drove 15 miles, noticed slipping transmission-> low fluid.
5. Added a half quart trans fluid, drove much better. (Makes sense as i was low on fluid).

I just drained about 4Q out of the OIL pan, which makes sense as i am at 5.5Q total out now, 6Q replaced.

So, given the distance driven, etc. What kind of damage may I have done. Clearly, in my mind, the engine was frothing the oil. I am unsure about the trans being low on fluid. Theories, comments, death threats are all welcome.

I am such as freaking fool.
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Old 05-22-2015, 12:27 AM   #2
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if your really worried you can service the transmission have you had it done or have you done it before ?
I think you are fine but I would like to know last time trans was serviced
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Old 05-22-2015, 04:30 AM   #3
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You have a drain plug on the transmission pan and pulled it by the sounds of it, instead of the oil pan drain plug?
I would have thought the suburban would hold way more than 1.5 quarts in the trans pan.
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Old 05-22-2015, 06:38 AM   #4
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Hope it wasn't the transfer case.
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Old 05-22-2015, 08:02 AM   #5
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Thanks all.

The truck only has about 115k miles on it, and the trans has not been serviced. Something I was planning to do soon.

I was surprised at the amount of trans fluid too, but I measured what I had taken out last night ( it'* been a few days since I did this. The bolt is recessed, and I did not drop the pan.

No, it was not the transfer case. The fluid is red. Fair comment though.
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Old 05-22-2015, 01:55 PM   #6
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Should have gotten more than 1.5 qts even with a recessed plug.

Probably should drop the pan next time.
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Old 05-22-2015, 02:01 PM   #7
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Ohh. Yes. I plan to drop the trans pan after memorial day. Until then, it'* not going anywhere. Do you pump the fluid out from the cooler line to swap more fluid out?

What about the extra oil in the engine. I am really more concerned with that than the trans. Thoughts?
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Old 05-22-2015, 02:09 PM   #8
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Don't worry about leftover oil in the system. You probably have about 4 qts just in the torque converter.
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Old 05-22-2015, 02:13 PM   #9
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So i should be ok having driven 30 miles or so with about 4QT too much engine oil?

For the trans, just drop the pan, replace the filter, and refill?

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Old 05-22-2015, 02:17 PM   #10
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Oh, no. You gotta get that extra 4 qts out. I thought you were talking about something different.

Trans is correct.
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