Tremec 2nd gear Resonance ?

[Rated R]

Just got my M1 today. Less than 3K miles on it. Really clean car, looks and drives great. However under throttle second gear is resonating from the shifter, 1st to a lesser extent but second is quite pronounced. It's definitely not right. I didn't experience this with either of the two GT350's I had. I'll take it to the dealer to have them do something about it but was wondering if it's a common issue with any of your M1's and what did they do about it?

Sponsored

 

[Gregdd]

https://www.mustang6g.com/forums/threads/second-gear-hiss-on-a-mach-1-with-tremec.178755/
There have been a few discussions about noise. My car doesn't do it.

 

[WD Pro]

Is it a resonance (post #1) or a hiss (post #2) ?

I suspect I am in a very small minority group, but my MT82 shifter had a resonance / vibration (mostly in second gear) at high (7K+) rpm that I A) found the cause unexpectedly, and B) suspect I might have initially made worse by swapping the shift knob.

More details here :

I fitted the part I didn’t know I needed …

Steeda shift collar, bought from the forum, and refinished before fitment :

We won’t talk about this bit of an unexpected job …

I was hoping that this mod would get rid of my high RPM (7k+) shifter buzz, and as part of my research I ended up in another thread, and soon realised that my shifter was actually assembled incorrectly by Ford.

I will include the info here as it may help others in future :

-----------------------------------

From what I can tell (and if Ford would have assembled mine correctly), that white spacer is held down by the o ring, and the o ring is held down by the standard reverse lockout collar when it's in its lower / home position i.e. even if the spacer and o ring move up a little when the collar is lifted and reverse is selected, they will get pulled back down the shaft by the collar when it returns to its home position. The o ring also acts as a buffer / isolator between the white spacer and the lock out collar.

Note that the standard collar does not have the upper internal o ring like the Steeda collar.

I think that my rattle was coming from the incorrect assembly i.e. my shift collar sitting directly on top of the white spacer, coupled with the following :

• No internal o ring in the top of the standard collar.
• My change of shift knob to the Ford Performance version (no leather wrapped up inside the internal bore to act as a buffer / sound deadener to the standard shift collar).

The replacement Steeda collar appears to be designed to operate in exactly the same way as the original (with regards to keeping the o ring and spacer down in position), but has the added benefit of having a second internal upper o ring to keep the top of the aluminium collar from contacting the shaft, therefore adding additional sound deadening / metal part isolation In that area.

Now some random pictures to help with understanding the above.

Standard and Steeda components - note that the bottom of the standard shift collar has been removed as it gets broken during removal of the standard shift boot :

Standard (MT82) shifter :

Standard assembly order (I think) :

Spacer and o ring position after fitting the standard collar in the home / bottom position (same position with the Steeda collar) :

A right pair of knobs :

As I’ve seen a few posts in the past asking - mine takes 11 full turns (approx 14mm of thread engagement) to sit in a nice position that still allows easy engagement of reverse. 12 turns still worked, but the ridge on the collar was right up to the underside of the knob.

11 turns, and reverse :

The only problem I have now the buzz is gone, is the loss of my audible 'shift now' warning ...

Note for anyone doing this mod on the standard shifter : ensure the roll pin is central in the shaft :

If that pin is not centered, there is a chance it will cut into the inner bore of the Steeda collar (possibly adding NVH ?) :

-----------------------------------

WD

Hope you get it fixed

WD

 

[murick]

@Rated R
Read the "hissing" thread @Gregdd mentioned.

The quick check if you have the same issue is this:
When in second gear and experiencing it - slightly push the shifter knob either to left or right.
Pushing knob to left (driver side) should intensify it, pushing knob to right should lessen it (or eliminate it completely).

If this proves the hypothesis then you are most likely looking at the resonance between the plastic collar of the reverse lock out and the hard stop of the shifter frame.
I have spent some time on this and eventually changed the shifter for MGW one.

During the change I believe I understood the problem, but it still was not at all clear how to solve it as there was not much to play with - considering how the stick and shifter frame are assembled together and mounted to the transmission/car frame.

 

[TEAsGrabber]

I had the same thing.....Dealer made adjustment, and it was 50% better......it's completely gone now with mileage!

 

[Rated R]

Is it a resonance (post #1) or a hiss (post #2) ?

I suspect I am in a very small minority group, but my MT82 shifter had a resonance / vibration (mostly in second gear) at high (7K+) rpm that I A) found the cause unexpectedly, and B) suspect I might have initially made worse by swapping the shift knob.

More details here :

Hope you get it fixed

WD

Yeah a hiss is a good way to describe it. Pronounced under throttle, goes away letting of the gas.

@Rated R
Read the "hissing" thread @Gregdd mentioned.

The quick check if you have the same issue is this:
When in second gear and experiencing it - slightly push the shifter knob either to left or right.
Pushing knob to left (driver side) should intensify it, pushing knob to right should lessen it (or eliminate it completely).

If this proves the hypothesis then you are most likely looking at the resonance between the plastic collar of the reverse lock out and the hard stop of the shifter frame.
I have spent some time on this and eventually changed the shifter for MGW one.

During the change I believe I understood the problem, but it still was not at all clear how to solve it as there was not much to play with - considering how the stick and shifter frame are assembled together and mounted to the transmission/car frame.

I've had some experience in replacing shifters which have made the same sort of resonance/hissing noise with the aftermarket shifter. I had a Challenger SRT8 with a 6 speed Tremec TR-6060 and made the same sound. I Dynamatted everything that I could to get rid of the hiss.

It's probably rubbing something when the transmission moves to the right under throttle. Hopefully the dealer can make an adjustment.

 

[Coastal-Mach]

My car had the issues in 2nd gear. I changed the shift knob to a weighted White Madness knob and the noise went away. Good luck with resolving the issue, and enjoy the new car.

 

[murick]

It's probably rubbing something when the transmission moves to the right under throttle. Hopefully the dealer can make an adjustment.

Do the test I described. If positive, it is the plastic collar having the intermittent contact (under vibrations) with the shifter's frame hard stop.
Dampening the vibrations may help (as e.g. with the weighted shifter knob). Realigning may help too. But the solution is not obvious because there is no leeway to realign anything. I.e. you need to force it.
Anyway good luck at a dealer. My dealer "did some adjustment" which helped a little, but month later I got a problem with the drive shaft (could be a coincidence) .

 

[Mikepol2]

I have a 3rd noise... a creaking / squeaking from first to second. You can easily repeat the noise by applying pressure towards reverse and wiggling the shifter front and back. Can't make it happen in any other location. Have been thinking about taking off the shift knob and trying to get some lithium grease in there, or possibly getting a Raceseng aluminum reverse lockout to replace the plastic factory one (I have a weighted Raceseng knob). Just started making the noise at around 7,000 miles.

 

[murick]

Reading my previous reply I realized that I might have given a misleading indications regarding the parts involved.

So here is the picture of the aforementioned critical spot. Should have written "plastic sleeve for reverse lock-out" instead of plastic collar.

 

[skinnyb]

Mine does it. Only in second gear, kind of a whiny growly noise that increases with RPM. Not hugely noticeable but definitely there, only about 5000 miles on mine, 2021 model... Really noticed when I was running a twisty road last weekend and ran in second between curves for a while without upshifting, just winding out from curve to curve. Hit third and went away... Will try putting pressure on the shifter left and right and see how it does...

 

[JetGray_Mach1]

Mine is very faint almost never noticeable (28K miles). What I do have is my reverse collar still getting stuck in the up position. I tried lubing it but didn't work. I will take a look later when I get a chance but I have just got used to pushing it down every time I come out of reverse for now.

 

[WD Pro]

Mine is very faint almost never noticeable (28K miles). What I do have is my reverse collar still getting stuck in the up position. I tried lubing it but didn't work. I will take a look later when I get a chance but I have just got used to pushing it down every time I come out of reverse for now.

If the mechanism is like the MT82, there is a roll pin in the shaft under the shift collar - if it’s not central in the shaft, it will dig into, and restrict the movement of the collar.

WD

 

[SheepDog]

Install headers and an H-pipe.. You won't hear many of the clearance related sounds your car makes anymore.

 

[skinnyb]

Install headers and an H-pipe.. You won't hear many of the clearance related sounds your car makes anymore.

Did that on my last Mustang . No thank you, it was so god awful obnoxiously loud. I resonated it and still wasn't to my liking. It was a 10 speed though

Sponsored