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Tractor Talk Discussion Forum

Automobile Automatic Trans

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GETRDUN

01-17-2007 10:49:45




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My first automatic transmissions had a drain plug in the pan and it was easy to drain the fluid coupler. Now, I put a magnetic drain plug in my transmission pans. Then drain and fill the pan when engine oil is changed. If the trans filter is clean when the pan is off to install the plug and the drainings look normal,then I am not concerned about the filter. This has worked for me and costs less to do than having the fluid flushed professionally. While my results have been good, the mileage and number of vehicles involved would not be statistically significant, as many transmissions have preformed well without maintenance. Comments please.

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davpal

01-17-2007 21:35:38




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 Re: Automobile Automatic Trans in reply to GETRDUN, 01-17-2007 10:49:45  
I kind of do the same thing on my car. I pump the fluid out of the dipstick tube with a hand pump and then drain the torque converter. It has a drain plug. 1993 Lincoln Mark VIII. This usually gets me about 8 or 9 quarts out of 12. I then fill it back up and go another 30,000 miles or so. I don't believe in pulling the pan and changing the filter because I think you can easily do more damage than good if you even get a spot of dirt in there. I am not fond of the flush either because that probably stirs up more dirt and does more harm than good. Kind of like sediment on a river bottom.

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John M

01-17-2007 18:02:47




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 Re: Automobile Automatic Trans in reply to GETRDUN, 01-17-2007 10:49:45  
So why are you changing your transmission fluid with every oil change? While I think you arent hurting anything, your spending money you dont have to.



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Duner Wi

01-17-2007 17:39:11




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 Re: Automobile Automatic Trans in reply to GETRDUN, 01-17-2007 10:49:45  
I change as much fluid will come out and install a drain plug so I can replace about 1/2 of the fluid every year. Throw in a cow magnet or two also. So far it has been working but only have 250,000 miles . I don't know if it helps but I don't think it does any harm either.



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wdTom

01-17-2007 14:21:38




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 Re: Automobile Automatic Trans in reply to GETRDUN, 01-17-2007 10:49:45  
I bought a 86 van with a auto in 88. I took the pan off and checked the band adjustment and put a new filter on. Since then every few years I remove a cooler hose from the trans cooler in the radiator and start it up, pumping flued into a bucket. When no more fluid comes out (not very long) I shut it off and put back new to make up what I just removed. On this transmission it was 6 quarts, which is about all you get if you remove the pan. This has kept the fluid nice and pink and the transmission is still the same as it was, have 140 thousand on it now. A lot of the driving was long trips with little stopping and shifting. Anyway, this is what I have done.

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Janicholson

01-17-2007 12:53:34




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 Re: Automobile Automatic Trans in reply to GETRDUN, 01-17-2007 10:49:45  
I also have no automatics, but your idea is better by a wide margin than doing nothing. I would put a flush and replace in it every 10 years, needed or not, just to get complete fresh oil in the unit. Putting a drain plug in the pan when it is off next might be nice. JimN



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RustyFarmall

01-17-2007 11:09:26




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 Re: Automobile Automatic Trans in reply to GETRDUN, 01-17-2007 10:49:45  
I tend to avoid buying anything with an automatic transmission if at all possible.



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