BG synchro shift II

[SLOBullitt]

Changed out the factory mt82 fluid with the BG synchro shift II. 100 miles later. Cold nibble still there. When hot, much better feel. Snicks into the 1-2 & 2-3 much smoother. Overall, worth the $ and time.

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[GreenS550]

I looked at this. 75-80W correct? I do not believe our transmissions use this thick of oil. If you put the 75-80 W in I would remove it. I believe the MT-82 uses a fluid thinner and closer to ATF. When I put eith Mobil 1 or Royal Purple Synchromax in the shifts were smoother and quieter. If what you used is not that you are likely OK. I'm just thinking of the stated issues with the forks breaking and if the viscosity is different, there might be a warranty claim denied.
I'm not trying to argue, but when I got on their site they listed the kit as using 75-80. I do not believe this is the correct stuff. I know the newer Mustangs do not use rear axle lube in the transmissions.
If I was going to do it I would use something like this:
https://www.americanmuscle.com/royal-purple-synchromax-manual-transmission-fluid.html

 

[HoosierDaddy]

Unless Ford changed it for 2018+, the Synchro Shift II meets Ford's standards for the MT82.

 

[GreenS550]

I did not think our newer Mustangs used 75-80W oil in the transmissions. I looked up Ford's spec and it is listed as automatic transmission fluid. I would not use this stuff in my transmission. Axle, yes. Their website says it meets the specs. I think they are wrong.
Ford: https://www.fcsdchemicalsandlubricants.com/main/quickref/mantrans.pdf
Synchro-shift: https://www.opmustang.com/store/p4/...II_Synthetic_Gear_Oil_-_MT82_Kit_.html.html#/

 

[GreenS550]

I stand corrected, the Ford spec is DCT fluid. Still, not that 75W thick stuff.

 

[aileron]

Changed out the factory mt82 fluid with the BG synchro shift II. 100 miles later. Cold nibble still there. When hot, much better feel. Snicks into the 1-2 & 2-3 much smoother. Overall, worth the $ and time.

Same results when I swapped to the SynchroShift II. Cold nibble is a tiny bit concerning, but as long as you don't force it too quickly while cold it's fine. Warm it's great! I see absolutely no need to install an aftermarket shifter; the OE body mounted shifter is better than okay - it's very tight and tidy.

 

[GreenS550]

I just remember when I changed the fluid on my previous Mustangs with Royal Purple trans fluid they shifted much smoother and easier to get in gear. Didn't that 75 weight stuff look thicker?

 

[aileron]

I just remember when I changed the fluid on my previous Mustangs with Royal Purple trans fluid they shifted much smoother and easier to get in gear. Didn't that 75 weight stuff look thicker?

What I drained out of my Bullitt's trans certainly wasn't 75W; it's thicker than ATF but thinner than 5W-20 engine oil. The BG SS II is about the same viscosity as the OE fill.

 

[GreenS550]

I just learned something. I thought that BG SS II was synthetic axle lube as it listed the viscosity as 75-80 on the jug I saw. Just was concerned about putting something too thick and having a warranty issue as some folks here are newer.

Sounds like you did your homework! Sorry to have troubled you guys. Please report back after you get a few miles on it and tell us what you think.

 

[aileron]

I have 1,500 miles on the BG SS II, would recommend it as a noticeable improvement but it's not miracle oil. The 'same' Getrag gearbox, as built by Getrag in Germany (not the Chinese Ford/Getrag Joint Venture) that was in my BMW M5 and 550 was a much better transmission.

 

[jacknifetoaswan]

I just learned something. I thought that BG SS II was synthetic axle lube as it listed the viscosity as 75-80 on the jug I saw. Just was concerned about putting something too thick and having a warranty issue as some folks here are newer.

Sounds like you did your homework! Sorry to have troubled you guys. Please report back after you get a few miles on it and tell us what you think.

If you want it, just buy the trans and diff kid from Optimum Performance. It comes with pumps and damn near everything you need to get the job done, outside of a jack, a drain pan, and a couple Allen keys. The diff fluid is called Ultra-Guard LS, BTW...

JR

 

[The Rooster]

Im not sure I understand the thought process of putting different oils into the car than the manufacturer uses/specifies....
Call me crazy but I believe that the people that design, build and warranty the car and its components know more than I do, therefore I simply use what they say to use.

 

[HoosierDaddy]

Im not sure I understand the thought process of putting different oils into the car than the manufacturer uses/specifies....
Call me crazy but I believe that the people that design, build and warranty the car and its components know more than I do, therefore I simply use what they say to use.

It's a shame the people who design it aren't the ones who say.

 

[GreenS550]

I personally would never change the viscosity on something like the transmission. The quality and ingredients can make a difference. When I have used Royal Purple or Mobil 1 with factory specs I have experienced better shifting this included using MotorKote as a supplement in the manual trans and rear axle. Slightly quieter.
With the engine and the need for oil to be lubricating all the cams, chains, bearings, etc of our DOHC too thick of an oil could be a serious problem I would think. Maybe why Ford went from 8 to 10 quarts.

 

[aileron]

It's a shame the people who design it aren't the ones who say.

^^^ Exactly. I've worked directly for a major motorcycle manufacturer and been CEO of a supplier of transmission components for a major automobile manufacturer. I've shaken my head more than once how the vehicle manufacturers decide (and shift) between lubricant suppliers; it sure ain't the design engineers calling the shots!

If you can gain access to the motorsports arm of the vehicle manufacturers, you'll occasionally find the engineers and tech staff are spec'ing the lubricants - but not always :-)

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