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Old 09-22-2020, 05:16 PM   #1
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What fluid?

Tom I have new to me 1997 Prevost XL40 with a DD series 60 and Allison. Showing low trans fluid but when I pulled the dip stick the fluid looks pale yellow. Does not look like transcend or dextron? What would it be?

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Old 09-22-2020, 05:34 PM   #2
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Engine coolant in the trans will make the fluid appear milky.

Fluid analysis would be the first step.
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Old 09-22-2020, 05:46 PM   #3
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Fluid color

It is not at all milky - clear but no hint of the red color like transcend or dextron?
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Old 09-22-2020, 05:58 PM   #4
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OK, 40 years in automotive, and every trans fluid Iíve seen ,uncontaminated, was red.
Hopefully, Tom , the Allison fluid engineer, will see your post and post information soon.
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Old 09-22-2020, 07:04 PM   #5
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Don't know which Allison you have but if it is 3000 or 4000 series Allison recommends checking the fluid with the shift control panel after the transmission fluid is warm. Check your owner's manual.
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