1994 4R70W and Mercon V - TCCoA Forums
 
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post #1 of 17 (permalink) Old 11-11-2003, 10:06 PM Thread Starter
 
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1994 4R70W and Mercon V

So I've been looking at some TSBs from Ford, and they all specifically say
1. Mercon and Mercon V are NOT interchangable.
2. Mercon V should NOT be used where Mercon is specified for use.
3. All 4R70W's before 1998 should use Mercon and not Mercon V.

I've got Mercon V, and haven't done the J-Mod yet. What gives?
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post #2 of 17 (permalink) Old 11-11-2003, 11:01 PM
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Ford issued a series of conflicting statements... but Mercon V was developed specifically to help address the TC shuddering issues in trannies like ours. There are no differences between 98+ and pre98 cars that render it unusable in an older 4R70W. ALL AODs, AODEs, and 4R70W's should use Mercon V.

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post #3 of 17 (permalink) Old 11-11-2003, 11:43 PM
 
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yeah the tranny shop told me that they the problems they were having with mine was because of the mercon V and they called the assoc of automatic transmissions or some bull **** thing i cant remember and they agreed that the mercon V was the problem.

i kept tryin to tell them BS but they wouldnt waranty their work with mercon v. ***holes. Who you gonna believe some assoc that reverse engineers the dang tranny or the guy who designed it.
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post #4 of 17 (permalink) Old 11-12-2003, 05:38 PM
 
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I put M.V in my 95 and so far its been great! I swear its smoother since I changed it too! Could just be in my head though... Either way its working great for me so I say go 4 it!

I think my tranny and TC took like 12 litres! It's expensive too... but worth it if your TC is shuddering.

Jake
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post #5 of 17 (permalink) Old 11-12-2003, 05:52 PM
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Use Mercon V, period.

Someone close this post now.

-J

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4R70W Converted, U4P0/SCT Controlled
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post #6 of 17 (permalink) Old 11-19-2003, 09:03 PM
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Quote:
Originally posted by MN12BIRD
I put M.V in my 95 and so far its been great! I swear its smoother since I changed it too! Could just be in my head though... Either way its working great for me so I say go 4 it!

I think my tranny and TC took like 12 litres! It's expensive too... but worth it if your TC is shuddering.

Jake
mine took 18 quarts........

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post #7 of 17 (permalink) Old 11-19-2003, 10:24 PM
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... What did you do, fill it up till it started pouring back out of the dipstick tube? Have 8 coolers or something?

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post #8 of 17 (permalink) Old 11-20-2003, 10:40 PM
 
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well, it should take 12 litres and I think a litre is a bit more than a quart... at least it is up here! I know there is a US quart and a Canadian quart??

WTF like we need different quarts? Lol, lets fight for the right... quart!

Jake
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post #9 of 17 (permalink) Old 11-20-2003, 10:43 PM
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Well 14 US quarts is way too much unless you have transmission lines ran all over the car for some odd reason.

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post #10 of 17 (permalink) Old 11-21-2003, 02:15 PM
 
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Our '94 had the shutter problem and i went and bought 13 quarts of Ford mercon V, flushed trans, refilled, installed new filter, and the trans is like new. It took a few days for the fluid to work, and the trans operates perfect.
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post #11 of 17 (permalink) Old 11-25-2003, 09:24 PM
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The Mercon V should work fine but according to the service bulletin I was shown there is a compatability problem with the type of rubber used in older trannys seals and mercon V. It should work fine until the seals start leaking though.
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post #12 of 17 (permalink) Old 11-25-2003, 10:14 PM
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Quote:
Originally posted by Old_coot
The Mercon V should work fine but according to the service bulletin I was shown there is a compatability problem with the type of rubber used in older trannys seals and mercon V. It should work fine until the seals start leaking though.
yes there are rumors about this.. but we have it right from the source that this is not an issue in our cars. ALL AODs, AODEs, and 4R70W's can and should use Mercon V.

Page 5 of the OD 101 tranny article if anyone is interested.

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post #13 of 17 (permalink) Old 12-01-2003, 01:22 PM
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Use the Mercon V, period.

I did the JMod to the valve body and added a transmission cooler. In all, it took 12.5 quarts of Mercon V. I had a bit of shudder before the Mercon V and JMod, but none since. I've done everything but mountain driving and drag racing with the transmission and no problems. That was 11,000 miles ago. This is not an ancedote, just fact.

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post #14 of 17 (permalink) Old 12-01-2003, 02:25 PM
 
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Well then somebody tell that to Wilson's Transmissions here in Danville, Il.


Apparently im just a know it all a-hole customer who doesnt know what im talkin bout.
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post #15 of 17 (permalink) Old 12-01-2003, 03:35 PM
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Robin,

They don't make any money admitting they don't know what they are talking about.

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post #16 of 17 (permalink) Old 12-01-2003, 10:29 PM
 
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plus, you can't blame any professional shop for going against what Ford says. We may all know it's okay to use but any average mechanic looking it up or asking Ford would have to say it's NOT interchangable. My mechanic was even boggled when I said to use the 100 dollor fluid over the 20 dollor (for 12 litres) generic Mercon! I use Synthetic oil also, Mobil1 to be exact and they also wonder why I buy 35 dollor oil over 10 dollor oil! The way I see it is that it's worth the extra money if it's any bit good for my engine over time. But they just want me to save lots of money I guess.

Jake
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post #17 of 17 (permalink) Old 12-02-2003, 05:50 PM
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Quote:
Originally posted by Old_coot
The Mercon V should work fine but according to the service bulletin I was shown there is a compatability problem with the type of rubber used in older trannys seals and mercon V. It should work fine until the seals start leaking though.
I just replaced my trans filter, and refilled with 6 qts of M-V. Works great. Also, let me say that leaking will be...difficult. That I tried to make a small hole in it, as it did not line up. Even with a drill, it was close to impossible. However, it is not impossible. Just my two cents.

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