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Discussion Starter · #1 · (Edited)
Hello all, searched around but could not find a definite on the amount of fluid that is needed to change the external spin on filter and pan drain transmission fluid. Want to do it myself this week-end and would like to know how much fluid it should take to refill once complete. 6 - Speed Allison Transmission with LMM.

I will be using Valvoline VI Fully Synthetic fluid.

Thanks in advance all.... :help
 

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According to the Amsoil product lookup guide it is only 7.4 quarts. I just did mine and is fairly easy.

10 quarts will bring it back up to the normal fluid level.
I think you are referring to the engine oil. He wanted to know about the transmission.
 

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Discussion Starter · #5 ·
7.4 quarts then.

Took 9 quarts exactly to fill it to the top of the HOT line when running and warmed up. Put in 7.5 quarts and drove for a while but it was not quite to the top of the HOT line. Im sure it was fine but I am anal about things being on the nose lol.

:gearjamin

By the way, the Valvoline DEX VI Full Synthetic is great. So far I am seeing 1 more mile per gallon. Also changed my front and rear diff fluids and the trans case so everything is fresh and synthetic except for the trans case, I just put regular DEX VI from WalMart in it. I think I will change it over to the Valvoline DEX VI Full Synthetic this summer. The temps on the tranny are down around 100 to 120 at 60MPH and around 30 degrees outside here earlier.
 

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7.4 quarts then.
Right on..............


Oh......^^^Filling to the top of the HOT line is really not proper for every Allison trans.IMHO it depends on ambient temps also,some will run hot and shift bad if too much fluid is added.......The proper fluid level is supposed to be near the middle actually..Put it at the top of the fill line and it's hot enough and you'll be removing some fluid so the Allison can keep cool...
To the OP.......do you have THAT many miles on a 08??.....oh,
Valvoline Dex 6 is good,it's what I have in my stage 5.....:D:drink
 
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