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Old 12-11-2018, 05:29 PM   #1
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AT545? External filter

Hello fellow Skoolie fanatics. I have an 83 Ford with a Thomas body and a Detroit diesel 8.3L. First I canít find any identification numbers on my transmission. I have looked up pictures of the AT545 and am fairly certain thatís what I have. I can not find an external filter anywhere on it. Do some not have one or am I just not looking in the right place. If not I am trying to change my fluid before my winter commute from Idaho to Arizona. I have read that internal filters should and should not be changed. I am trying to do the minimum amount of labor until I get back in the spring but would like to cover the basics to ensure I make it there and back without major headaches. Any information on any of these points would be greatly appreciated. Thanks in advance.
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Old 12-12-2018, 06:09 AM   #2
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some of the older 540s did not have the external spin on filter.. they were something that was a filter which filtered fluid going through the cooling lines.. my 1978 Superior doesnt have an external filter on it... the external filter was an external component with the filter located on the frame rail right next to the the transmission normally if you have it.



your transmission was made with 1 of 2 transmission pans. a shallow or a deep pan.. the standard shallow pan is about 2 inches deep.. and the deep pan is about 4 inches deep.. the filter is different depending on the pan you have.. your filter will be internal to the pan..



-Christopher
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Old 12-12-2018, 06:37 AM   #3
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I haven't seen a 545 mated to an 8.3 before.
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Old 12-12-2018, 07:11 AM   #4
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Originally Posted by EastCoastCB View Post
I haven't seen a 545 mated to an 8.3 before.

it may be he has a detroit 8.2, which were low enough spec that they did put 545s behind them.. a 545 would never stand up to a cummins 8.3 you are right, it would est that trans alive!
-Christopher
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Old 12-12-2018, 07:20 AM   #5
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Originally Posted by cadillackid View Post
it may be he has a detroit 8.2, which were low enough spec that they did put 545s behind them.. a 545 would never stand up to a cummins 8.3 you are right, it would est that trans alive!
-Christopher
I see. 8.2 would totally make sense.
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Old 12-12-2018, 10:50 AM   #6
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Oops it is the 8.2. Sorry about the typo. Thanks cadillackid for the info. Appreciate the help!
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Old 12-12-2018, 03:23 PM   #7
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I have an 86 ford Thomas with the 8.2 and 545.
My 545 doesn't have the external filter.
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