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#1241185 - 07/25/07 07:55 PM Fluid change=possible problems
mrbear5300 Offline
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Registered: 12/29/05
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A couple days ago, I changed out my tranny fluid with Mobil 1 full synthetic ATF. I drained the converter and dropped the pan and replaced the filter. The old fluid was in no way burnt or in a condition that would warrant leaving it in there.

I've always had that TC shudder problem since I bought the car two years ago. It was never serious, just did it when cruising in the 40-48 mph range on rare occaisions. Car always shifted fine.

Now I changed it and its acting kind of wierd. The fluid level is perfect but it seems as if sometimes in the morning, there is a very slight delay when I put it in gear. Its very slight but still noticable to me. Also, when its still cold, it shifts kinda hard. Once it is warmed up, it does not do this anymore.

And, the TC shudder is still there! In fact, it did it real hard a few times when doing under 40mph and still seems to do it in the 40's.

Is something screwed up now or does the new fluid have to "work its way in??" I DID reset the PCM, as I was told dumping in new slippery fluid after draining out old grippy fluid could cause slippage issues. Perhaps the PCM is still learning shift paramaters?? Thanks for any insight.


Edited by mrbear3800 (07/25/07 07:57 PM)
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#1241220 - 07/25/07 09:22 PM Re: Fluid change=possible problems [Re: mrbear5300]
JMSA540 Offline
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Registered: 05/30/07
Posts: 5776
Id add a litle bit more fluid, the fluid is cold and expands when hot


Edited by JMSA540 (07/25/07 11:44 PM)
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#1241261 - 07/25/07 10:22 PM Re: Fluid change=possible problems [Re: mrbear5300]
Big_Bad_Joe Offline

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Registered: 12/12/01
Posts: 8468
Loc: Rochester NY
which mobil synthetic?????

was it the mercon spec V?

if not thats a big no no in my book

i would not us their stuff in any tranny of mine

mercon motorcraft spec... royal purple mercon spec if I was using an aftermarket fluid

check your bottles if you saved them or the sales receipt
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#1241302 - 07/25/07 11:34 PM Re: Fluid change=possible problems [Re: Big_Bad_Joe]
mrbear5300 Offline
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Its mercon V spec, I made sure of that.
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#1241321 - 07/26/07 12:09 AM Re: Fluid change=possible problems [Re: mrbear5300]
Fordiesel69 Offline

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I would NOT use mercon V in those old trannys. The friction material is not designed for the added friction modifiers.

Also verify the filter did not drop down and fall in the pan. If the oring is not is the right place it will cause the filter to fall out.
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#1241499 - 07/26/07 11:06 AM Re: Fluid change=possible problems [Re: Fordiesel69]
RF_Overlord Offline

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Registered: 12/14/02
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mrbear, it can take a few hundred miles to correct the T/C shudder issue once you've changed the fluid, especially if you had the proble for a while.

 Originally Posted By: Fordiesel69
I would NOT use mercon V in those old trannys. The friction material is not designed for the added friction modifiers.
Actually, Ford back-spec'd Mercon V for all years of AODE/4R70W a number of years ago. I used it in my '94 Thunderbird SuperCoupe for the last 100,000 miles of the 152,000 miles I had it. I did a pan-drop and filter every 30,000 miles and it was still going strong when I retired the car.
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#1241508 - 07/26/07 11:16 AM Re: Fluid change=possible problems [Re: RF_Overlord]
Bangster Offline

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Registered: 11/30/01
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Loc: Tucson Az
Mercon V is the proper fluid for that tranny. 5 more days and Ford pulls the plug on Mercon anyways. They are not going to license the formula or produce it anymore, and even the 4R100 guys will have to use it, which was a big no no before, but soon they will have no choice.
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#1241584 - 07/26/07 01:20 PM Re: Fluid change=possible problems [Re: Bangster]
mrbear5300 Offline
professional grade
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Registered: 12/29/05
Posts: 5059
Loc: BUF
Thanks for the responses. If it is still acting wierd 5000 miles from now, perhaps I'll drain this fluid out and try the Ford brand Mercon V.
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#1241635 - 07/26/07 02:20 PM Re: Fluid change=possible problems [Re: RF_Overlord]
Crown Nick Offline
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Registered: 01/12/07
Posts: 3244
Loc: Houston, TX
 Originally Posted By: RF_Overlord
mrbear, it can take a few hundred miles to correct the T/C shudder issue once you've changed the fluid, especially if you had the proble for a while.


Never heard of that before. I had TC shudder for close to 80k miles when I finally changed out my fluid again at 150k miles. Shudder went away immediately.
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#1241765 - 07/26/07 05:39 PM Re: Fluid change=possible problems [Re: Crown Nick]
mrbear5300 Offline
professional grade
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Registered: 12/29/05
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Loc: BUF
 Originally Posted By: Crown Nick
 Originally Posted By: RF_Overlord
mrbear, it can take a few hundred miles to correct the T/C shudder issue once you've changed the fluid, especially if you had the proble for a while.


Never heard of that before. I had TC shudder for close to 80k miles when I finally changed out my fluid again at 150k miles. Shudder went away immediately.


I don't know. Seems like whatever I do to this car, it stays the same or gets worse....
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#1241799 - 07/26/07 06:21 PM Re: Fluid change=possible problems [Re: mrbear5300]
Bangster Offline

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Registered: 11/30/01
Posts: 9343
Loc: Tucson Az
Did the old filter have the oring on it when you removed it?
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#1241828 - 07/26/07 06:53 PM Re: Fluid change=possible problems [Re: Bangster]
mrbear5300 Offline
professional grade
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Registered: 12/29/05
Posts: 5059
Loc: BUF
 Originally Posted By: Bangster
Did the old filter have the oring on it when you removed it?


Yes sir. And I installed the new one with the new filter.

Also, the filter material that was inside the intake opening of the old filter was pretty dirty. I don't want to say it was clogged but it looked kinda crappy. Perhaps the increased flow from the new filter is causing havoc with a transmission that is used to less flow??
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#1241932 - 07/26/07 09:27 PM Re: Fluid change=possible problems [Re: mrbear5300]
Big_Bad_Joe Offline

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Registered: 12/12/01
Posts: 8468
Loc: Rochester NY
i've never used mobil transmission fluids ....

in doing some light research it seems that mobil one has a product they call SPec5.. but the other mobil ones are dexronIII safe.. and lots of complaints from Mopar folks...

not acceptable at all in volvo's....

I don't know.. I would have used motorcraft mercon V rather than cross the river....
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#1241939 - 07/26/07 09:33 PM Re: Fluid change=possible problems [Re: Big_Bad_Joe]
Dan The Vic Man Offline
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Registered: 11/22/03
Posts: 9890
Loc: Coon Rapids MN
Use mercon v and let us know what happens.
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#1242044 - 07/26/07 11:34 PM Re: Fluid change=possible problems [Re: Dan The Vic Man]
mrbear5300 Offline
professional grade
Poobah

Registered: 12/29/05
Posts: 5059
Loc: BUF
 Originally Posted By: Dan The Vic Man
Use mercon v and let us know what happens.


It IS mercon V. The mobile one synthetic ATF I am using is Mercon V approved.

I'm going to give it a chance before I dump it all out. That was alot of money...


Edited by mrbear3800 (07/26/07 11:35 PM)
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