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So at full throttle my tranny kicks in a little harder than is like but not bad enough to concern me. As I was cleaning my egr I decided to check my fluid in the tranny and sure enough it was a little low by ... JOIN NOW TO REMOVE TRACER

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  #1  
Old 12-23-2011, 03:47 AM
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Default lucas tranny fluid a no no????

So at full throttle my tranny kicks in a little harder than is like but not bad enough to concern me. As I was cleaning my egr I decided to check my fluid in the tranny and sure enough it was a little low by a qt. Or less so being as I pretty much have a stock pile of Lucas diff and tranny fluid I decided to put a bottle of the tranny fluid in when I noticed something... On the dip stick it read Mercon sp... Hmm that's the same tranny fluid I had to use on my jaguar. Which when I owned my jaguar I did a little research on the tranny fluid and every one claimed that Mercon sp in not compatible with any other tranny fluid. So I called Lucas directly and they said they have no studies of it working or not with that type of oil and I should use at my own risk....

It got me to thinking though... I used to work at 4wheel parts and when ever a truck got a tranny pan we re filled the tranny with royal purple and a qt of the Lucas... Were we ruining the cords tranny this whole time?

My question is being as Lucas is prob one of the most popular name brand oils on the market I'm sure a ton of people have used it with out knowing Mercon sp compatibility I mean hell if I never peeked that jag I would of been the first person to say its ok to use it in this particular tranny so has any one here used it with no ill affects because something tells me the people in the jag forum just didnt know what they were talking about

---AutoMerged DoublePost---

Forgive weird words I'm using my phone to write and it changes words it doesn't know to ones it thinks I'm trying to spell

Last edited by brondondolon; 12-23-2011 at 03:47 AM.. Reason: Automerged Doublepost
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  #2  
Old 12-23-2011, 09:57 AM
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The TorqShift was introduced with the 2003 6.0. Prior to that the 7.3L had a 4 speed AOD that was a standard Mercron fluid transmission.

I recommend contacting NADM, Sun Coast, ATS, maybe even Hughes Performance to get your answer. Let's be honest, their are guys on here advocating GAS 10W/30 oil in their diesels.

So before you make a $5500 mistake (estimated cost of a rebuilt TorqShift and don't forget the converter cause you'll probably smoke the lock up clutches, too) do some checking. Kragen has a universal trans fluid that meets the Mercon SP requirement for about 5~6 bucks a qt.

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Last edited by Karls03; 12-23-2011 at 10:00 AM..
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  #3  
Old 12-29-2011, 01:29 PM
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I try to avoid lucas anything but I would not put their ATF in a 5R110. The solenoids that control that trans spec a nice light weight fluid and the wrong one could destroy them.

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  #4  
Old 12-29-2011, 01:33 PM
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Originally Posted by rufushusky View Post
I try to avoid lucas anything but I would not put their ATF in a 5R110. The solenoids that control that trans spec a nice light weight fluid and the wrong one could destroy them.
I agree, I stay away from Lucas stuff as well.

FYI, Mercon SP has been superceded by Mercon LV now. I will be sticking with the Mercon stuff, it's good fluid.

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  #5  
Old 12-29-2011, 01:45 PM
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Originally Posted by Karls03 View Post
Let's be honest, their are guys on here advocating GAS 10W/30 oil in their diesels.
Not to totally hijack but who is doing that? I have seen some people talk about running MC diesel or Rotella T5 10w-30 but not Valvoline SL 10w-30 or pennzoil platinum or something like that.
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Old 12-29-2011, 01:49 PM
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I don't think he was pointing to anyone in particular, but you see some crazy things on the forums and off from time to time... happens in any motorsport.
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Old 12-30-2011, 08:38 AM
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I could have read a post wrong, who knows? But the dumbed down point is that it says "Mercon SP" on the dipstick for a reason. You don't put Type F into a Turbo 350 trans, do you?
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Old 12-30-2011, 08:45 AM
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Originally Posted by Karls03 View Post
But the dumbed down point is that it says "Mercon SP" on the dipstick for a reason.
But just to confuse you they say this:

"From Ford Tech Service bulletin Sep/Oct 2009:

Tech tips

Approval to Service ALL 5R110 Automatic Transmissions with MERCON® LV

Beginning immediately ALL (2003 to 2010 MY) 5R110 automatic transmissions can be serviced with MERCON® LV automatic transmission fluid in place of MERCON® SP.

Initially only the 2009/10MY 5R110 automatic transmissions were filled and serviced with MERCON® LV. In an effort to reduce complexity, Ford Motor Company is allowing all previous model year 5R110 automatic transmissions to be serviced with MERCON® LV automatic transmission fluid. This pertains to top off as well as fluid replacement. Mixing of MERCON® LV and MERCON® SP in the 5R110 transmission is acceptable. Extensive testing has been performed to insure there are no functional or durability concerns with the use of MERCON® LV in the 5R110 automatic transmission.

Vehicles affected are F-Series Super Duty trucks (including chassis cab, motorhome, LCF).

Motorcraft MERCON® LV is now available in three sizes:
Part Number: XT-10-QLVC - 1 quart
Part Number: XT-10-DLV - 55 gallon drum
Part Number: XT-10-BLV - Bulk"


Oh ford and their ATF
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Old 12-30-2011, 09:14 AM
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HEY! Looky what I found on Fordparts.com:
Motorcraft® MERCON® LV Automatic Transmission Fluid (ATF)
Premium-quality ATF for Ford, Lincoln and Mercury transmissions
Provides excellent performance in electronically controlled automatic transmissions
Manufactured with high-viscosity index, premium-quality, hydroprocessed base oils and specially designed performance additives
Provides excellent shifting characteristics at high and low ambient temperatures, and guards against transmission shudder
Offers excellent thermal, oxidation and shear stability, as well as good low-temperature fluidity
Provides wear protection and inhibits the formation of gum, sludge, lacquer and foam
Helps prevent rust and corrosion
Dyed red for easy leak detection
Not for use in applications where MERCON® V, MERCON® SP, Continuously Variable Chain Type Transmission Fluid, Motorcraft® Premium Automatic Transmission Fluid, FNR5 Automatic Transmission Fluid or Type F Automatic Transmission Fluid is recommended
Not for use in transfer cases
Recommended by Ford Motor Company
Available in cases of 12 one-quart bottles

If that doesn't cornfuse things! There I was, happily web surfing along reading the accolades of MERCON LV and it's compatibility with MERCON SP and I find this on Ford's site. Is this an effort to keep us buying SP at $14/qt?

Last edited by Karls03; 12-30-2011 at 09:25 AM..
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  #10  
Old 12-30-2011, 11:50 AM
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Can you even still buy SP? My trans was just rebuilt a couple months ago, the tech told me he used LV in mine and said to continue using it. It was powerstroketech87 on here...
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