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Old Mar 27, 2004 | 03:51 PM
  #1  
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From: Seffner/Tampa Florida
Tranny Fluid

I want to change the fluid in my tranny and I am hearing, Mercon V only!! then I am hearing under no conditions use Mercon V!!
What do I do ???
Someone please email me and tell me the right one to use.
1999 V10 automatic 4.3 gear 66k miles.
 
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Old Mar 27, 2004 | 04:53 PM
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I would use the recommended ATF in this TSB:

http://www.ofoc.ca/garage/TSB%2001-15-7.pdf
 
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Old Mar 27, 2004 | 05:00 PM
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What is the recommended ATF????????
 
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Old Mar 27, 2004 | 05:16 PM
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The 4R100 with your V10 requires MERCON, not MERCON V, and not a fluid that has both MERCON and MERCON V ratings.

That's what it says in your owner's manual. I think they are right.
 
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Old Mar 27, 2004 | 07:35 PM
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Thumbs up

Thanks for that info
 
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Old Mar 28, 2004 | 10:59 PM
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What about Mobil 1 synthetic ATF? Has anyone tried it on the V-10 4R100?
 
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Old Mar 29, 2004 | 04:13 AM
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Originally Posted by DJR 17
What about Mobil 1 synthetic ATF? Has anyone tried it on the V-10 4R100?
I don't know, but I would like to know...
 
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Old Mar 29, 2004 | 07:02 AM
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just use regular Mercon, the bottle might read Mercon/Dextron, Mercon V is no good , i beleive it is synthetic. Its noted in the owner manual that Mercon and Mercon V are not interchangeable. Also on the Tranny Dipstick it should read what the truck take's ,mine is an 02 and say;s Mercon.
 
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Old Mar 29, 2004 | 07:07 AM
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https://www.ford-trucks.com/articles...hangingatf.php
 
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Old Mar 29, 2004 | 07:29 AM
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Look at your tranny dipstick... It should say which type.

Edmo
 
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Old Mar 29, 2004 | 07:58 AM
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Originally Posted by DJR 17
What about Mobil 1 synthetic ATF? Has anyone tried it on the V-10 4R100?
I use Mobil 1 synthetic ATF in my 4R100 behind a V10. Works great.

I think it is the best fluid choice for a 4R100 transmission. It has the MERCON rating, but not MERCON V. That's exactly what the 4R100 needs.
 
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Old Mar 29, 2004 | 02:44 PM
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From: Seffner/Tampa Florida
Originally Posted by Casey
I use Mobil 1 synthetic ATF in my 4R100 behind a V10. Works great.

I think it is the best fluid choice for a 4R100 transmission. It has the MERCON rating, but not MERCON V. That's exactly what the 4R100 needs.
Thanks
 
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Old Mar 30, 2004 | 11:24 AM
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Any idea how much the Mobil 1 costs /quart or /gallon?
 
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Old Mar 30, 2004 | 02:31 PM
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Last time I bought some it was $4.99/quart.
 
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Old Mar 30, 2004 | 05:20 PM
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From: Seffner/Tampa Florida
Is it safe to switch from Mercon to the synthetic ATF?
My tranny has "Mercon".
 
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