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... Coming up on 30K miles on my '04 Dodge Cummins Never serviced the auto transmission other than keep fluids level. What's the best ATF for here on out? Amsoil, makes no difference, other?... JOIN NOW TO REMOVE TRACER

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Old 02-24-2009, 07:49 AM
WinstonWolf's Avatar
Diesel Enthusiast


Default Best Automatic Transmission Fluid, switchover

... Coming up on 30K miles on my '04 Dodge Cummins

Never serviced the auto transmission other than keep fluids level.

What's the best ATF for here on out?
Amsoil, makes no difference, other?

WinstonWolf's Sig:04.5 Cummins® 5.9L tuned w/Superchips® Flashpaq™ 3805. Airaid® M.I.T, Airaid® Premium air filter, gutted cat
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Old 02-24-2009, 10:51 AM
RSWORDS's Avatar
Status: Back, and trying to fix 'er up

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I LOVE teh Amsoil I'm using in my new tranny. I've been abbusing the hell out of it and it is staying good. Not the cheapest by a long shot but do it once and do it right!


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Old 02-27-2009, 05:08 PM
06Dodge's Avatar
Diesel Enthusiast



Been using Amsoil ATF in every Dodge trans I have owned for the last 9 years and I have never had a problem from using it. IMHO its the best ATF made.

06Dodge's Sig:2006 2500 QC SB SRW 4x4 Auto 3.73 Nerf bars
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Old 02-27-2009, 07:12 PM
Heath's Avatar
Authorized Amsoil Dealer
Status: on the Harley if not here



Good stuff You're in luck if interested. Prices just went down 2 hours ago. Can shoot one if you become interested.

Heath's Sig:
AMSOIL Regency Direct Jobber
My AMSOIL Website
Buy AMSOIL at wholesale/purchase options.

Have questions or want pricing? Contact me
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Old 04-06-2009, 04:18 PM
Diesel Fan
Status: wishing for a southern uprising!



Amsoil by far! I use their ATF, 15w40 hd motor oil with their micro media or whatever they call their filter. And also their gear oil for my diffs. I forget what weight that is.. seems to me like 80w or somthing like that. The gear oil smells rank.. but its good stuff!
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Old 04-14-2009, 01:43 PM

Send a message via AIM to Dirtbikindad393 View Member's FaceBook Profile


I run Amsoil also. It sure made my trans run smoother once I got the factory fluid out.
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Old 04-14-2009, 08:13 PM
Status: My Customers are #1

Luke Buchanan lukesdiesel

Amsoil or Royal Purple
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Old 05-24-2009, 10:12 AM
XLR8R's Avatar
Diesel Enthusiast
Status: Unleashing the 6.7L Beastie



Amsoil's ATF & Marine 15W-40 are about the best according to Team XLR8R's lube engineer, but we use SynerGyn fluids in the race truck.

XLR8R's Sig:3 Nails Garage
Sleeps a flock of Rams & a Goat
GUN-HAPPY Crew Chief
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