Mercon V downward compatible with Mercon ?

[sladezero]

Hey there,

I was curious, I will be changin tranny fluid in my tempo.
Is the MERCON V downward compatible with MERCON ?
If so do I have to worry about the yellow metals with the GL-4
gear spec?

Slade

[kbro]

Originally Posted by sladezero

Hey there,

I was curious, I will be changin tranny fluid in my tempo.
Is the MERCON V downward compatible with MERCON ?
If so do I have to worry about the yellow metals with the GL-4
gear spec?

Slade

ford TSB # 01-15-7 say`s fluids are not interchangeable and has a
list of which cars are and which are not.

[proticus]

there is an additive that you can throw in with the mercon to make it just as good as mercon V. I'm not sure how much it costs, and for the life of me i can't remember what it was called. maybe lube guard? don't quote me on that, i'm not certain if i remember right.

[proticus]

just reread your post sladezero, i didn't even catch the part about the gl-4. do you have a manual transmission? if so, why would you have mercon in it? it's way too thin. but i'm probably just misunderstanding.

[sladezero]

Hey there,

I was thinking the same thing too. That is until I called the dealership
and they said to use MERCON/DEXRON III ATF. The link below also
recommends this stuff as well. The manual tranny is at the bottom.
I went ahead and got a synthetic blend. I'll most likely run it for a
couple of weeks and check it. If it's good I'll run it for about 3-6months
and change. If it works good I might move onto a synthetic.
Of course if the Pennzoil Synthetic blend works well why switch right ?
I am not choosy. If it works why change and risk it.
BTW- for those of you new to this as I am the MTX was said by the
dealership to hold 6.2pints or 3.1Quarts (Same thing).


http://www.v8sho.com/SHO/TSB01157ATFUsageChart.htm

Hope this helps to explain it a little.

Slade

[proticus]

it just doesn't seem to make sense in my head to put something that thin into a gear box. the mercon/dexron was made specifically as thin as it was because it had to be so thin for the slushboxes(automatic transmissions). the mercon is moving very quickly through an automatic transmission. that's why it's so thin. it just doesn't make sense in my head to put it in a manual transmission. but maybe they're right. although, i would definitely call a couple more places and get a 3rd and 4th opinion. i might recall having put mercon in ford manual transmissions before, but it was a while ago, and i might be confusing it with another vehicle's transfer box. i don't remember. but i would definitely get that 3rd and 4th opinion. or in fact, just open the plug on your tranny and see what's all ready in it. good luck