Changing VS Flushing Tranny fluid

MYMISSIONISFISHIN · Jul 22, 2024

I have a 2014 Ram 1500, with the 5.7L Hemi. Just recently had the transmission rebuilt. How often do you recommend changing/Flushing the fluid, and which is recommended? Obviously it has all new fluid in it after being rebuilt, but was wondering if i should change or flush the oil on a regular basis or not. I heard every 30,000 miles was average. The change IMHO will be cheaper, but it doesn't replace ALL the fluid, whereas a FLUSH i assume does, but i have heard, it moves any sedement and may clog the filter. So can someone help me to understand what is best option, when time comes to do so. I have 153K miles on the motor.

BenchTest · Jul 22, 2024

You're certainly going to get a ton of opinions on this. Mine would be fluid/filter replacement at 30K on a rebuild. If it looks good (no signs of something bad going on internally), continue to do fluid/filter changes on 60K intervals after that. I'd steer clear of flushing.

Forsakentalon · Jul 22, 2024

When you're ready just drain and fill twice. Once in the spring and once in the fall to keep the financial burden lowest.

A flush done at a shop? You don't know what's all gone through that machine. It may have filters but do they change filters in their flush machine?

Too many variables.

Plus a flush doesn't clean off the magnets inside the pan

Burla · Jul 22, 2024

take the temperature out of the trans, delete temp 8 speed and bypass valve get that off it not done already. Take temp out will make fluid last longer, but I'd still do 60k mile flushes at max, fluid will degrade after that in this transmission. Some transmissions are very easy on fluid, this isn't one of those, perhaps not that hard on it with temp delete, but yes flush fluids maybe you will get better miles out of it then last time.

Changing VS Flushing Tranny fluid

MYMISSIONISFISHIN

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BenchTest

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Forsakentalon

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Burla

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