MT-82 Transmission Additive Update - Page 11 - Ford Mustang Forum
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Originally Posted by anjunabeats91 View Post
How much of the XL-18 do you add? The whole bottle?
Yes... the whole bottle is added. It is a small bottle of less than one ounce. Super easy to do and IMO, worth the cost.

I'm not sure on the bushing but I know several folks have stated that aftermarket bushing kits do make a difference. Please report back on the bushings (may be a good experiment to do the bushings first and report the results, and then add the xl-18). Good luck!


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I finally got the bottle added. My 2012 GT/CS has 18k miles on it when I bought it and is sitting at 31k now. I have no idea if the PO did anything with the tranny fluid and I haven't. I went to add the XL-18 with just the front on ramps and when I removed the fill plug fluid started dumping. So I grabbed a quart of QDC from the dealer and made sure the car was leveled out on jacks the second attempt. I used a funnel and tubbing from the engine bay. Added the XL-18 and replaced the QDC that had spilled. I can definitely say shifting is much smoother both cold and hot. A lot of the notchiness I experienced while depressing the clutch and re-engaging the tranny is now gone. I also had a slamming feeling coming from the tranny/DS when under-driving sixth (cruising at 45, releasing the gas, and re-applying) that is all but gone.

I'm still debating switching to Redlines MTL or RP's Synchromax to see if there's any additional improvement using a higher quality fluid vice the QDC/additive mix.


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Originally Posted by DonJuan692006 View Post
I finally got the bottle added. My 2012 GT/CS has 18k miles on it when I bought it and is sitting at 31k now. I have no idea if the PO did anything with the tranny fluid and I haven't. I went to add the XL-18 with just the front on ramps and when I removed the fill plug fluid started dumping. So I grabbed a quart of QDC from the dealer and made sure the car was leveled out on jacks the second attempt. I used a funnel and tubbing from the engine bay. Added the XL-18 and replaced the QDC that had spilled. I can definitely say shifting is much smoother both cold and hot. A lot of the notchiness I experienced while depressing the clutch and re-engaging the tranny is now gone. I also had a slamming feeling coming from the tranny/DS when under-driving sixth (cruising at 45, releasing the gas, and re-applying) that is all but gone.

I'm still debating switching to Redlines MTL or RP's Synchromax to see if there's any additional improvement using a higher quality fluid vice the QDC/additive mix.
My thoughts exactly. Mtl and xl-18?

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2014

Just figured I'd add my 2 cents, I picked up my 2014 about 5 weeks ago just a base Gt with track pack and recaros. Since the day I picked it up when it is cold, sitting over night, it is extremely difficult to get into 2nd gear even third is a little rough. Once I give it 10-15 mins. to warm up seems to be fine. Don't know about additives but according the local techs this is considered "normal" for the MT-82. When I change the fluid I will try the additive just to see if it helps, since it down in the 30's here lately. It's sad in a way I still have my 2005 with the lowly TR-3650 and 130,000 miles on it never gives me a bit of trouble and works perfectly no matter how hard I lean on it. I guess there might be something to be said for where the metal comes from!
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Originally Posted by Exslider400 View Post
My thoughts exactly. Mtl and xl-18?
I don't think I would mix the two. The XL-18 was designed to compliment the QDC from Ford. Being that I'm no chemist, I don't think I would leave it to chance that mixing XL-18 with anything but QDC could lead to disastrous results. Even if there was a difference with the immediate results, who's to say that the XL-18 wouldn't cause premature breakdown in other fluids and cause increased wear within the tranny?

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Originally Posted by scooterrolls View Post
Just figured I'd add my 2 cents, I picked up my 2014 about 5 weeks ago just a base Gt with track pack and recaros. Since the day I picked it up when it is cold, sitting over night, it is extremely difficult to get into 2nd gear even third is a little rough. Once I give it 10-15 mins. to warm up seems to be fine. Don't know about additives but according the local techs this is considered "normal" for the MT-82. When I change the fluid I will try the additive just to see if it helps, since it down in the 30's here lately. It's sad in a way I still have my 2005 with the lowly TR-3650 and 130,000 miles on it never gives me a bit of trouble and works perfectly no matter how hard I lean on it. I guess there might be something to be said for where the metal comes from!
All 2014 any any 2013 built after 7/9/12 already has the additive.
This thread, page 9, 5th post.

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I don't think I would mix the two. The XL-18 was designed to compliment the QDC from Ford. Being that I'm no chemist, I don't think I would leave it to chance that mixing XL-18 with anything but QDC could lead to disastrous results. Even if there was a difference with the immediate results, who's to say that the XL-18 wouldn't cause premature breakdown in other fluids and cause increased wear within the tranny?
I do agree. Seeing if anyone has already done it before I try but kinda thinking NO. I have another post asking what fluid to change to (Redline MTL, Amsoil, or Royal purple) but only 1 reply for Amsoil so far.... should have done a poll I guess. I have read where MTL works great but Redline (& Amsoil) pulled the spec out for our transmissions recently and wanted to see if RP not only meets the spec but has same improved results.

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?

My point wasn't if it was there but that even with it being factory added the problem still exists in my car, which is dis-hearting to me. So if I control the situation maybe I can make an improvement. The ford people I know locally estimate a repair rate of over 6% of the early MT-82's had to have mechanical repairs or replacement. Could have something to do with the higher viscosity oil being used?
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This morning I had my dealer do my fluid swap under the Ford TSB for the MT82, QDC with XL-18. For some reason my dealer said they could not find anything about Ford paying for the XL-18. Since it wasn't part of the TSB, even tho the fluid chart lists the XL-18 added to the QDC as the recommended/approved fluid for the tranny....so I needed to order and pay for it. Took about ten days. Ford covered the labor and QDC gear fluid. I could feel a difference on the drive home, 4 miles, in the better shifting. I will try a cold 1st to 2nd shift in the next day or two when the rain stops....

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The XL-18 on top of fresh QDC id definitely an improvement. But, it sure is not perfect still. The first 1-2 shift out of the garage this morning was great tho. No crunch or lockout. Still a nibble here and there on the way, softly, to 6th till she warms up. But all in all a little bit better. I had tried BG syncromesh2 and MTL redline. I liking the Ford fill the best so far...I will learn to just live with the idiosyncrasies....I suppose.

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Thanks for the update. My transmission is about as good as an MT82 gets, but as you said there are unique idiosyncrasies. I've learned to drive around them but once in a while one catches me by surprise.

I'm going to do a fresh fill of QDC with the XL18, disconnect skip-shift and put in an energy suspension shifter bushing to see how it all works.
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Thanks for the update. My transmission is about as good as an MT82 gets, but as you said there are unique idiosyncrasies. I've learned to drive around them but once in a while one catches me by surprise.

I'm going to do a fresh fill of QDC with the XL18, disconnect skip-shift and put in an energy suspension shifter bushing to see how it all works.
The ES bushing is an amazing bang for the buck major upgrade. You will wonder why you didn't do this long ago.

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My dealer just did the TSB11-11-1 on my 2012 Mustang V6 because I was having issues trying to get into 1st gear. This TSB in Canada replaces the transmission fluid to XT-11-QDC but doesn't include nor have they heard of the XT-18 Additive. This TSB has improved my shifting greatly but I'd like to have this XT-18. Anyone know anywhere where I can order a bottle?

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My dealer just did the TSB11-11-1 on my 2012 Mustang V6 because I was having issues trying to get into 1st gear. This TSB in Canada replaces the transmission fluid to XT-11-QDC but doesn't include nor have they heard of the XT-18 Additive. This TSB has improved my shifting greatly but I'd like to have this XT-18. Anyone know anywhere where I can order a bottle?
Have the dealer get the latest fluid chart from Ford. I'm going through a similar issue. The TSB is for cars built on or before 8-15-2011. Mine build date is 8-17-2011. I'm waiting for the Service Manager to get in touch with Ford Corporate about them paying for the work.

He also had not heard of the XL-18 additive. I asked him to pull up the fluid chart (should be from June 2013). For the MT-82 it has "see note 6". Note 6 below the chart states to add 27ml of XL-18 to any full fluid change. The chart for reference can be downloaded here: https://www.fcsdchemicalsandlubrican...f/mantrans.pdf

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Quote:
Originally Posted by DonJuan692006 View Post
Have the dealer get the latest fluid chart from Ford. I'm going through a similar issue. The TSB is for cars built on or before 8-15-2011. Mine build date is 8-17-2011. I'm waiting for the Service Manager to get in touch with Ford Corporate about them paying for the work.

He also had not heard of the XL-18 additive. I asked him to pull up the fluid chart (should be from June 2013). For the MT-82 it has &quot;see note 6&quot;. Note 6 below the chart states to add 27ml of XL-18 to any full fluid change. The chart for reference can be downloaded here: https://www.fcsdchemicalsandlubrican...f/mantrans.pdf
Thanks for that, I forwarded the link to the Service Manager at my dealership to look into it for me.


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2019 Mustang Bullitt, 2014 Mustang MCA Edition in Grabber Blue. Previously: 2016 Shelby GT350 in Race Red, 2015 Mustang V6 Competition Orange, 2012 Mustang V6 Premium ProCharged in Black, 2011 Mustang V6 Premium in Red Candy Metallic, and 1979 Mustang Cobra in Bright Red (My 1st New Car)
Website www.mymustang.ca
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