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Topic: 30w in place of transmission fluid (Read 2973 times) previous topic - next topic

30w in place of transmission fluid

Reply #15 –
Quote from: Haystack;398587
I don't use anything differently, and I have gotten up to 114 plus for several days or weeks straight.

I would assume a tranny cooler would help it.

Straight 30w in engines is for climates where it never gets below freezing. In winter you should run either 10w-30 or 10w-40. The w just means its winter rated, and acts as a 10w oil when cold, but thickens up to 30w when warm.

Nope that ain't right either...No oil thickens when hot... 10W-30 is like 10W when cold but is still something like 15-20x times thicker than a hot 30 weight... Basically a 10W-30, only thins out to a 30W when hot instead of a 10w...

As far as oil changes,  I run Mobil 1 Extended Performance(rated for 15K mi changes) or similar synthetic for one year intervals in both my Grand Marquis'... In that time they'll run up 8000-10000mi... 

A good explanation of oils and viscosity...

http://www.upmpg.com/tech_articles/motoroil_viscosity/
 

30w in place of transmission fluid

Reply #16 –
Not sure why we are talking about viscosity of oil in the engine. I was wondering about the fluid in the AOD. Anyone use anything different in extremely cold climates?

30w in place of transmission fluid

Reply #17 –
Oh now Chrome.... This thread was started because Jcassity wanted know about transmissions drinking oil in HOT climates. Now it looks like your trying to high jack this thread (lol). Transmission fluid anyone??

30w in place of transmission fluid

Reply #18 –
hi-jack away, its a good topic for different climates.  as you see the TSB i show , Allison back in early 2003 i think approved engine oil in certain conditions pertaining to climate.
Since force protection was purchased by GDLS, i cant get to the .mil website for the MAC charts but the link i posted should be good nuff for proof.

30w in place of transmission fluid

Reply #19 –
Ttt