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Royal Purple Synchromax Manual Transmission Fluid

Market Price $25.99 You Save 12% ($3.00)
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FREE Shipping on orders over $49
  • Item 45004
  • MPN# 1512

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Features & Details

  • Smoother Shifts
  • Better Transmission Performance
  • Superior Protection
  • Full Synthetic
  • Resists Breakdown
  • 1-Quart Bottle
Protection. Royal Purple Synchromax® is a full synthetic transmission fluid that provides superior wear protection for your Mustang's drivetrain. Synchromax® is formulated with Royal Purple's synthetic, proprietary Synerlec® additive technology, which offers improved shift quality over a wide temperature range and reduced gear noise. Use Royal Purple Synchromax on your Mustang's next fluid change for the cheapest insurance you can get against future transmission breakdowns.

Better Shifts. If your transmission is notchy, rough, or loud but is mechanically fine, a fresh fill of Synchromax® can help smooth things back out. If you have a new Mustang or transmission, changing your fluid to Synchromax can keep your transmission working better - both now and later.

Protects Internal Components. Synchromax® is fully compatible with all types of friction materials and offers excellent corrosion and oxidation protection without affecting the soft metals commonly found in manual transmission synchronizers.

Application. Synchromax® is recommended for manual transmissions that specify an automatic transmission fluid or motor oil. Please note the T-45/T-3650 will take approximately 3.25 quarts to fill the transmission after a full transmission fluid flush.

Fitment: 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Details

What's in the Box
  • (1) One Quart bottle
Installation Info
Tech Specs
Will it fit my Mustang?
  • Boss 302 - 12, 13
  • Foxbody - 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93
  • Mach 1 - 03, 04
  • V6 - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17
  • Bullitt - 01, 08, 09
  • Cobra - 94, 95, 96, 97, 98, 99, 01, 03, 04, 93
  • GT - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17
  • GT500 - 07, 08, 09, 10, 11, 12, 13, 14
  • EcoBoost - 15, 16, 17

Fits manual transmissions

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Most Helpful Reviews

MT-82 became butter

I did a lot of research on what fluid to use in my 2012 GT/CS. I looked at many reviews for Redline products, Lucas, and Royal purple and by far the Royal Purple had the MOST reviews and the most positive. ...

Read More
Helpful (1)

It is smooth as butter

Royal purple is a product I use in all my cars. I use it in my brand new 4.10 rear and my manual transmission which is what I bought this product for. It keeps the syncros shifting smooth and prevents ...

Read More
Helpful (1)

Overall Rating 4.8 out of 5 stars
Read All 100+ Reviews

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27 Questions / 12 Answers

Ask a Question

how many quarts of transmission fluid do i need for my 1998 t-5 transmission?


  • you need 3 quarts. you can refer to your owners manual.


Show 2 more answers Helpful (5)

Is this safe for use in the MT82 2011+ GTs? Is this safe to use in the manual MT82 transmission for 2011+ GTs? I ask because I have heard its not good to change fluids outside of Motorcraft but I used this in my 01 GT and it made a huge difference in shift performance and I might have even picked up a few ponies


  • Yes this is safe to use. My local Ford dealer assured me it is great for performance enthusiasts.


Show 2 more answers Helpful (1)

Would this fix...? I'm long over due for a transmission fluid change and most likely going to buy this fluid, but I was wondering if this would fix a noise I have in 5th gear, (rubbing noise that is not constant but more of a lopping pattern noise) Keep up the awesome service AM!


  • This fluid will quiet down transmission noise to a degree. It really all depends on what's causing the noise. As long as it's not like a bad synchro or something to that effect it should help.


Show 4 more answers Helpful (1)

I have a 03 Mach 1 and was wondering how many quarts of royal purple to use and where I can find a filter if it needs one ?


  • The TR3650 transmission found in the Mach 1 requires 4 Qts of transmission fluid, Check with your local auto parts store for a Transmission filter.


Helpful (0)

I have a 2017 GT, with MT82. Should I use the Motocraft XL-18 additive when I perform the fluid change?


Why did KevinD92 of Ameircan Muscle answer a friction modifier was needed? For a manual transmission S197 I can see the friction modifier only being needed for the differential oil change, but NOT the transmission oil change? Am I missing something? Please clarify.


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Customer Reviews (100+) Write a Review

Overall Rating 4.8

out of 5 stars

  • 5/5

    August 21, 2016

    MT-82 became butter

    I did a lot of research on what fluid to use in my 2012 GT/CS. I looked at many reviews for Redline products, Lucas, and Royal purple and by far the Royal Purple had the MOST reviews and the most positive. I could not find a truly negative review. So I took a leap and bought it. After changing from my stock fluid, which came out looking like dirty motor oil, I let the car get to operating temperature and then gingerly drove around the block a few times to let the transmission as well before I got on it hard. I could definitely tell a difference right away. The shifts felt less notch, mind you I have a Barton shifter with two post bracket, and easier to engage. All in all I think it was worth the little bit of extra money to go with the Royal Purple.


    Year: 2012 Submodel: GT

    Helpful (1)

  • 5/5

    July 19, 2016

    It is smooth as butter

    Royal purple is a product I use in all my cars. I use it in my brand new 4.10 rear and my manual transmission which is what I bought this product for. It keeps the syncros shifting smooth and prevents jumping out of gear or sticking. I changed the fluid twice on my 2007 and it works like new. I highly recommend this product even though it costs twice the price in my opinion it is worth every penny.


    Year: 2007 Submodel: GT

    Helpful (1)

  • 5/5

    May 02, 2016

    Buy It!

    Drained the old burned fluid and filled the trans with Royal Purple and what a difference. Literally shifting it to reverse to back out of the shop after the repair was absolutely night and day. It feels like a whole different car now. Also if you don't have a pump to fill the trans you will need a piece of hose to over the nipple on the bottle. I put the hose in the fill port and stuffed the bottle up next to the driveshaft and squeezed as much as i could out. You will be left with about half a bottle so open another one and do it again. I bought 4qts just in case. After squeezing out 3 bottles about half way i just poured the other half in another bottle and filled it until fluid came out the hole. This fluid made my trans shift like it was made of butter! And I'm not exaggerating! 100 Buy!


    Year: 2005 Submodel: GT

    Helpful (1)

  • 5/5

    November 19, 2015

    Good protection, worth the money.

    I really like this product. Had my local transmission shop put this in my car, and it really helps. Shifts are a bit smoother and the whole thing is quieter, but improvements are rather small in that area. Where this REALLY shines is on cold mornings. In the past, you had to wait for the transmission to "warm up" before it would shift well. Until then, shifts would be jerky, and the transmission would not want to go into gear; basically, it would just be very 'defiant' for the first 5-10 minutes, and this was only on 45 degree mornings, can't imagine how bad it would be if I lived somewhere where it got REALLY cold. After switching to this, however, this issue no longer arises. Plus, its Royal Purple, so you know it's good not just now, but in the long run for the health of your tranny. Well worth the price!


    Year: 2012 Submodel: GT Azle, TX

    Helpful (1)

  • 5/5

    June 25, 2015

    Awesome product

    I bought this to replace my transfluid I bought from autozone......I had a lot of shaking and heat in my shifter. one I replaced that with this product it made a huge difference!!! it count the vibrations by 60 and the heat in my shift is completely gone. Also my shifting is nice and smooth now...it was a bit choppy but that problem went away.


    Year: 2001 Submodel: V6 North bergen nj

    Helpful (1)

  • 5/5

    June 20, 2015

    Wort every penny!!

    Bought this along with the Exedy mach350 clutch for my s197 to see if it helped with the issue I was having going into 2nd. Let me tell you guys it made a world of difference. Before I would have to attempt going into second twice for it to go in and even then it would go in with a light grind. After putting this in it goes in on the first try smooth as butter. I no longer have problems with any of my gears and the gearbox is a bit quieter. It's a great product and I am overall satisfied with it.


    Year: 2006 Submodel: GT El Paso, TX

    Helpful (1)

  • 4/5

    June 16, 2013

    minimizescommon trans problems

    If you have the 2011 or later mustangs, you know the trans, clutch and gear shifts are not the best. However, this oil is an excellent replacement to minimize those issues to an extent that your driving experience will improve. BUT. I also changed my clutch fluid to Brembo DOT 4 fluid and got it bled very professionally. So I believe it is the combination of the brake/clutch fluid, along with the trans fluid that made the difference in my driving experience.


    Year: 2012 Submodel: V6 Detroit, MI, USA

    Helpful (1)

  • 3/5

    May 27, 2013

    Good fluid, but no better than the other manual trans fluids.

    It works good, so no complaints there. But it doesn't perform any better than the other fluids. The biggest improvement comes from changing fluid that has been in there for thousands of miles. Like I said, it's not bad fluid, but I won't go paying an extra $5 a quart again for it either.


    Year: 1996 Submodel: GT Minneapolis, MN, USA

    Helpful (1)

  • 5/5

    March 30, 2013

    works wonders

    Used in my 2003 because it was starting to become difficult getting into certain gears. It was to the point where they would start to grind slightly going into gear. So I gave this a shot and after the first day I definitely noticed a difference. It glides into gear effortlessly now and has made it a lot quieter too. Probably going to get RP for the rearend too.


    Year: 2003 Submodel: Mach 1 New York

    Helpful (1)

  • 5/5

    March 22, 2013

    Awesome product, shifts a lot smoother!!

    Awesome product, shifts a lot smoother and the gears don't rub now!!.


    Year: 2012 Submodel: GT500 Malver, PA

    Helpful (1)

  • 5/5

    February 17, 2013


    Great product. Smooth shifts. Would highly recommend this product.


    Year: 2002 Submodel: GT McKinney, Texas

    Helpful (2)

  • 5/5

    January 12, 2013

    No problems

    Have put 500 miles on with zero problems. I filled up to fill hole, I had read where other people put less than recommended. I would rather use Fords recommendation. Royal Purple is never a bad choice always performs as should.


    Year: 1999 Submodel: Cobra Alabama

    Helpful (1)

  • 5/5

    November 29, 2012


    Did no think i was going to get results like i did. I had my doubts but changed my mind as soon as I started driving. Smoother shifts than Micron. I will be switching to ro yal purple from now on. Well worth the money.


    Year: 2010 Submodel: GT Spring, TX, USA

    Helpful (2)

  • 4/5

    November 22, 2012


    i was having a grind everytime i would throw it into 3rd gear and aftee changing the fluid its 90% gone! pretty much puts itself into gear now!!


    Year: 2002 Submodel: GT California, USA

    Helpful (2)

  • 5/5

    October 03, 2012

    notchy trans

    08 Bullitt trans always hard to shift, 2nd up or down very had to get, first would buck on low speed coast. put Royal Purple in and immediately could tell a difference, smooth shifting, coast smoothed out. 2nd gear is great up or down now.


    Year: 2008 Submodel: Bullitt Nashville, TN, USA

    Helpful (1)

  • 4/5

    October 01, 2012

    Royal Purple Synchromax Manual Transmission Fluid

    Smooth shifts in the Mach 1 what more can you ask for?


    Year: 2003 Submodel: Mach 1 Lyndon, VT, USA

    Helpful (1)

  • 5/5

    September 28, 2012

    stopped car from grinding!!

    car started to pop out of gear and did alot of grinding i have benn running this for a couple of months now problem solved switching all fluids to royal purple now!


    Year: 2004 Submodel: GT Clinton ct

    Helpful (2)

  • 5/5

    September 21, 2012

    Smooth shifting

    Changed to RP fluid in my manual trans, very nice! It quieter and smoother trans operation.


    Year: 1991 Submodel: GT Oxford PA

    Helpful (1)

  • 5/5

    September 04, 2012


    Royal purple synchromax Makes your pony go faster, better acceleration and smoother shifts. I used this on my 2001 GT and now im using it on my 2003 GT and works awsome. Royal purple is the best oil for your Mustang NEEDS.


    Year: 2003 Submodel: GT Midland, TX, USA

    Helpful (1)

  • 5/5

    August 25, 2012

    RP is always great - Am. Muscle is excellent seller.

    You can always rely on RP. My 2005 Liberty (no it's not a Stang) with a troublesome 6 speed settles right down with RP Synchromax init. But American Muscle gets the 5 stars - GREAT seller. PS - I do have a 03 Mustang convertible - RP in that too.


    Year: 2003 Submodel: Other midwest

    Helpful (1)