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Old 03-27-2014, 06:07 AM   #1
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Lsd

Anyone know if there is a LSD released yet for the NA focus? I believe the st has one but have not found any info for NA focus


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Old 03-27-2014, 06:30 AM   #2
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Since its a MTX-75 shouldn't any previously available automatic torque biasising differential work?
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Old 03-27-2014, 02:59 PM   #3
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Ford catalog shows the same part number for differentials in mtx-75s across the generations. Ford part # = 4026. I looked at '03, '08, and '12. same diff. So theoretically aftermarket diffs for these cars will fit.
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Old 03-27-2014, 03:34 PM   #4
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Ford catalog shows the same part number for differentials in mtx-75s across the generations. Ford part # = 4026. I looked at '03, '08, and '12. same diff. So theoretically aftermarket diffs for these cars will fit.
That's not a part number you can purchase a part by. The online parts catalog from Ford only lists the middle part of the part number. The prefix and suffix of the complete part number are not listed. Therefore any fwd differential would have the same corporate product classification code even if the parts are different.

However it's unlikely that the MTX-75 used a different differential over the years and Quaiffe lists an application for the 2012+ just like the pre 2011.
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Old 03-27-2014, 03:36 PM   #5
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That's not a part number you can purchase a part by. The online parts catalog from Ford only lists the middle part of the part number. The prefix and suffix of the complete part number are not listed. Therefore any fwd differential would have the same corporate product classification code even if the parts are different.

However it's unlikely that the MTX-75 used a different differential over the years and Quaiffe lists an application for the 2012+ just like the pre 2011.
Thanks, I didn't know that. At my work im used to seeing simple part numbers haha

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Old 03-27-2014, 03:51 PM   #6
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Thanks, I didn't know that. At my work im used to seeing simple part numbers haha

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Example the roll restrictor/ housing has a part number in Ford's electronic catalog of 6068, but this encompasses several parts. The Focus Electric and TSB mount for the Focus ST is CM5Z-6068-A but the catalog just lists it as another 6068 Mount.
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Old 03-27-2014, 03:54 PM   #7
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Anyone know if there is a LSD released yet for the NA focus? I believe the st has one but have not found any info for NA focus
FWIW the ST does not have a true mechanical differential. It's an electronically controlled torque vectoring system that utilizes the brakes on the inside wheel to send torque to the outer wheel.
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Old 03-27-2014, 04:10 PM   #8
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Originally Posted by swansong View Post
FWIW the ST does not have a true mechanical differential. It's an electronically controlled torque vectoring system that utilizes the brakes on the inside wheel to send torque to the outer wheel.
Since the torque vectoring system uses the brakes a diff swap shouldn't interfere with that though, right?
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Old 03-27-2014, 04:19 PM   #9
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Since the torque vectoring system uses the brakes a diff swap shouldn't interfere with that though, right?
I know some folks have installed LSDs into the Focus and Fiesta ST, but I'm entirely not sure of the results. IIRC they said the torque vectoring played quite nice with the mechanical diff, but did interfere at some point. If anything I would think that the LSD would do it's job, resulting the the torque vectoring system having less to do.
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