Manual Transmission Fluid Change - Diesel Forum - TheDieselStop.com
6.0L Power Stroke Engine and Drivetrain Discussion of the 6.0L Power Stroke diesel engine and drivetrain in the 2003-Up Super Duties and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.0L Power Stroke engine.

 
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post #1 of 7 (permalink) Old 06-07-2017, 10:26 AM Thread Starter
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Manual Transmission Fluid Change

I'm using Amsoil manual transmission fluid and thinking of changing it with 40K on it. The use is mixed with an empty truck and moderate towing. I don't want to throw away good oil. Any rec's on how many miles I can safely put on it?


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post #2 of 7 (permalink) Old 06-07-2017, 07:58 PM
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Way more than 40k miles. Your scheduled maintenance manual (assuming you still have one) says 60k miles, normal service.

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post #3 of 7 (permalink) Old 10-14-2018, 06:33 PM
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I just had a "hot flush" performed on my 6 speed manual by the dealer (forgot to ask them what type of fluid they used). Is there such a thing as a friction inhibitor for manual transmissions? I use Rev-X at oil changes, my buddy swears by that stuff as engine oil additive. If such a thing exists I would like to add to my transmission oil while it is new.


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post #4 of 7 (permalink) Old 10-14-2018, 08:36 PM
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What would you need a "friction inhibitor" for in a 6-speed? It might actually interfere with the operation of the synchronizers. Just my 2cents.

First truck -- 1929 Model A Ford pickup, restored from ground up. Wish I still had it!
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post #5 of 7 (permalink) Old 10-15-2018, 06:40 AM
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Agreed.

Just use a high quality ATF like Mobil-1 and its additive package will have all you need.


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post #6 of 7 (permalink) Old 10-15-2018, 10:13 AM
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I guess I was assuming that if there are addatives for big motors there would be the same for manual transmissions. I read about guys sometimes having problems with their automatics as soon as 40-60K miles on them. I want to do what I can to keep the power train as happy as posible since it has 227k on it.


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post #7 of 7 (permalink) Old 10-16-2018, 03:00 AM
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Quote:
Originally Posted by nate0341 View Post
I guess I was assuming that if there are addatives for big motors there would be the same for manual transmissions. I read about guys sometimes having problems with their automatics as soon as 40-60K miles on them. I want to do what I can to keep the power train as happy as posible since it has 227k on it.
I am of the opinion that 7.3’s don’t need oil additive products because motor oils today have such robust additive packages these days.

The automatics are a very diffferent animal from the manual trans but I understand your desire to want to take good care of your ZF-6.


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2002 F-250 4x4 CC SB 7.3 PSD w/4R100. 182,000 miles.
NOS Black CPS. ScanGauge-II, AIC, Bilstein 5100, Stancor GPR, Marinco Mod, B&W Turnover Ball, Michelin Defender LTX


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2002 F-250 4x4 SC LB 7.3 PSD w/ZF-6. 177,000 miles.
NOS Black CPS. ScanGauge-II. Bilstein 5100. Noco Mod. Michelin Defender LTX 285/75/16.

SOLD:
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2000 F-250 4x4 SC SB 7.3 PSD w/4R100. 164,000 miles.
NOS Black CPS. Rebuilt Fuel bowl w/gold spring, 6.0 Cooler, Walker BTM, Stancor GPR, Michelin LTX M&S2.
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