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Old 05-06-2013, 05:40 PM
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Lucas Oil Transmission Additive

My 200k mile 2004 Torqshift is giving me problems by rough shifting even after a well respected transmission shop in my area said it was fixed when the solenoid sensor was replaced. The mechanic said my pan was clean and my fluid looked good so I was wondering if adding the Lucas Oil additive would help me any even if my fluid was good? Havent read too many fourms on it but the guy who works at my local NAPA said it helped his car a whole lot and he hasnt had any problems since.

Any thoughts on this one?
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Old 05-06-2013, 07:25 PM
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I don't know... but everytime I pick up a can of transmission fluid at a parts store, it states: DO NOT USE in transmissions that require Mercon SP trans fluid. I believe it's synthetic, I couldn't find mercon SP anywhere but at a dealer.
If it was my transmission... I wouldn't put anything in it but Mercon SP.
I've heard bad things when folks don't use the Mercon SP in the torqshift trans.
FWIW... I got 235k miles on my torqshift trans, with only one trans flush @ 175k miles running @ 10k lbs GVW.
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Old 05-06-2013, 07:28 PM
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Ford has a Trans fluid additive


Sent from AutoGuide.com App
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Old 05-07-2013, 02:53 AM
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Quote:
Originally Posted by mts678 View Post
Ford has a Trans fluid additive


Sent from AutoGuide.com App
Where can I get it and how much does it cost?
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Old 05-07-2013, 06:50 AM
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I personally would not use a lucas additive in my trans or any additive for that matter. Never seen a 'ford additive' for a 5r. Never heard of that. I'll google it right now
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Old 05-07-2013, 06:53 AM
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Couldn't find a trans fluid additive made by ford/motorcraft
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Old 05-07-2013, 06:55 AM
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your trans is very sensitive due to the solenoids
use Mercon LV or SP
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Old 05-07-2013, 06:57 AM
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PS I do not believe Motorcraft has any " additive for the torque shift

your probably thinking of the friction modifier for the LS rear end ?
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Old 05-07-2013, 06:59 AM
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best thing I think you can do for a a 5r is upgrade to an in pan filter from a 08 late -10
it will require a new pan also
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Old 05-07-2013, 05:55 PM
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Quote:
Originally Posted by ZMANN View Post
best thing I think you can do for a a 5r is upgrade to an in pan filter from a 08 late -10
it will require a new pan also
Approximate cost? And will it make my shifting smoother?
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