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Old 08-12-2019, 01:03 PM   #1
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AT545 What Trans fluid do you recommend?

Hey all,


I have looked through most posts regarding the AT545 and I haven't saw what type or kind of trans fluid people are using. I will be adding a cooler and changing the fluid and filters and was curious what people have been using.
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Old 08-12-2019, 01:07 PM   #2
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Mine had a fresh change when I picked it up but I'll be draining it and refilling with Transynd. The standard stuff for a 545 is dex 3.
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Old 08-12-2019, 01:21 PM   #3
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Thanks! I am thinking the same
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Old 08-12-2019, 01:28 PM   #4
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Its around $45-$55 a gallon but its synthetic. In Fl it actually says in the school bus regulations and that all school buses must run transynd.

I got a cooler from Tango that he didn't need and plan to install it when I do the fluid change. Its a beefy unit made by Earls. He made me a deal on it but new they're around $400.
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Old 08-12-2019, 01:35 PM   #5
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I got a pretty decent deal on this cooler from a local shop I used to deal with. Should work for me.


https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
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Old 08-12-2019, 04:30 PM   #6
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Like charlie said, dexron 3 was the standard fill ages ago.

I recommend sticking with it. It's good enough for the job and you can get it from almost anywhere (parts store, hardware, grocery, gas station, etc.)

Transynd is a great fluid. It's a premium synthetic which will last many many miles and run cooler doing it. But for most, it's not necessary and just wasted money.

Some people have used John Deere hy-gard hydraulic fluid. I've never done it so I can't recommend it.

Some districts even used engine oil with allison's blessing
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Old 08-12-2019, 07:07 PM   #7
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I used standard Dextron/Mercon with some Lucas in mine. Video How To here........

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Old 08-13-2019, 12:44 PM   #8
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Thanks for the help! Should be installing the additional cooler this week and changing the fluid
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