Tranny fluid question

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Jun 19, 2006 | 08:19 PM

JD717

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From: Hudson Florida.

Tranny fluid question

I'm needin help here, will it hurt to run Mercon III in a tranny that is marked for Mercon II fluid? Accidentally put the wrong stuff in my Toyota(dont kill me for the yota.) havent driven it at all, but I want to know if it'll hurt anything before I do anything else.

Jun 19, 2006 | 09:34 PM

jimdandy

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The upgraded Mercons will work in trans marked for the older oils. I think it is around Mercon V that you can no longer do this. It usually tells you on the container.

jim d

Jun 20, 2006 | 02:52 AM

JD717

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From: Hudson Florida.

Thanks. now that I know this, I can relax a little. what exactly is the difference between the two though?

Jun 20, 2006 | 07:20 AM

jschira

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From: Mansfield, TX USA

Quote:

Originally Posted by JD717

Are you sure about the MERCON II and MERCON III?

There is MERCON, MERCON V and MERCON SP. I haven't heard of MERCON II or MERCON III.

Now DEXRON, DEXRON II, DEXRON III and DEXRON IV, those are all valid names and are all backwards compatible. So you can run DEXRON IV in a tranny marked for DEXRON, DEXRON II and DEXRON III.

The higher the number the tighter the specs. Anti-wear, anti-friction, anti-foaming, etc. will all be more stringent in DEXRON IV than in DEXRON, for example. Also the "tackiness" will vary.

Jun 20, 2006 | 07:21 AM

Casey

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There is no difference. There is MERCON, MERCON V, and MERCON SP. There is no such thing as MERCON II or MERCON III fluids.

Ford used to say that MERCON and MERCON V were not interchangable. Now they have changed the MERCON V formulation and say that is can be used in place of MERCON. And by next year there will be no more MERCON as Ford won't be issuing any more licenses to make MERCON fluids.

Jun 20, 2006 | 07:53 AM

JD717

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From: Hudson Florida.

well I meant Dexron, my bad. after posting this, I went out and did something I shoulda done to start with, READ THE STUPID BOTTLE. they're compatible so I'm good and my car shifts through gears much better.

Jun 20, 2006 | 09:12 AM

jimandmandy

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From: Running Springs CA

What you need to understand about ATF is that the important differences between fluid types are the frictional properties. Type F and Mercon, for instance, do not interchange. I made the mistake of using Dexron in a 1981 Toyota that called for Type F. Severe slippage was the immediate result. When you talk about Dexron to Dexron II to III, etc, improvements in cold-flow, anti-foaming, anti-oxidation are just evolutionary advances, like from one generation of motor oil to the next.

Jim

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Jun 26, 2006 | 06:29 PM

IB Tim

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From: 3rd Rock

...Welcome natefife, to Ford Truck Enthusiasts!

See you on the boards.

….

Jun 26, 2006 | 07:05 PM

#10

natefife

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Thanks. i just got my first real 4x4 and i think i already broke it today. uggg. got burried in mud that was pouring into the cab. not easy to do with over 9 inches of lift kit. oh well. ill just have to fix it all.

Jun 28, 2006 | 09:36 AM

#11

BPofMD

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From: Millersville, MD

Quote:

Originally Posted by natefife

can anyone tell my where to put the fluid into on my 79 f150? im at a loss and really frustrated. thanks

Natefife@comcast.net

Can you locate the dipstick hole???? You were kidding, right??

Jun 28, 2006 | 10:43 AM

#12

jimandmandy

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From: Running Springs CA

Manual trannys usually have the fill plug on the side, about halfway up.

Jim

Jun 28, 2006 | 11:01 AM

#13

natefife

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Thanks man, yeah i found it. i also found out that i had alot more work to do. i had to pull the bellhousing out a little bit yesterday and scrape mud and clay out. absolutly sucked but i think with a little more of that today she will be back ready to go hit the trails again. if only the garage where i plowed through the door when the clutch stuck was as easy to fix as the truck problem.