Manual Trans. Thud when shifting

[Sub-Moa]

The clutch spring did not make any difference in the thud. It does feel better in take up, though! I plan on swapping or for Royal Purple Synchromax after 1000 miles. I hope it helps!

Agreed. Should have clarified that a little more.

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[Dave]

You can doubt all you want.

Just as you can keep complaining it's not normal all you want... But keep in mind it's not me you need to convince, it's Ford.

None of the noises I've heard my Mustang make are out of line with my expectations, based on prior experience.

 

[FordService]

We have, and dealers will deem the problem ''normal''.....like the oil consumption problem my 12 had. The ''thud'' doesn't really bother me, I'm just hoping the transmission lasts. And, something definitely changed with the 15s, because the 11-14s did not have this problem. I have driven quite a few and none did it including my own. I have driven 2 other 15 manuals, and they both ''thud''.

Also, as per my Technical Expert; with the 2015 Mustangs, we have higher power outputs, so we have to have heavier duty transmission internals to deal with it. This will make for more noise when driven.

Something did change as I mentioned on my previous post, ridenfish39. I don’t have a list of what did change, though.

That still comes across as a cover story for the unwashed masses. What I do know (from experience) is that if my part of this car's drivetrain developed enough backlash to make a clunk like that, Ford would be all over us to get it fixed. They would never ever in a million years accept me telling them that "its heavy duty, so it makes more noise". That would never be acceptable. One of the key criteria of the ESOW is a part that meets the performance requirements without NVH issues. So, for Ford to turn around and use that excuse to its customers is a bit disappointing, to say the least.

Not necessarily an excuse, EXP Jawa. But, noticing no diagnosis can be formed via a forum, and not everything written on a forum is exactly the same in real life, I have to make others aware who are not familiar with a heavy duty transmission. Again, I know most of you refuse to bring your vehicles in to your dealerships, but that is always the first step. Even if they say it’s normal or not. I do appreciate your opinion.

Deysha

 

[grantourer]

I brought mine in. Same old tale. Brand new car that sounds like an old truck shifting. Very embarrassing.

 

[68fbjjz109]

As someone who works for major OEMs doing alot of vehicle studies and benchmarking I can tell you this.

No car company is immune, They all have there issues and some serious one GM, Toyota ect. The only saving grace for Toyota is the don't really innovate outside of hybrids, and they make very slow incremental changes which is why their vehicles are boring.

Anyhow.


NVH and resolving NVH issues is a ridiculousness complicated task, and it is extremely expensive, and difficult process to deduce at times. Especially while maintaining other specifications, and coming in at projected costs. Those engineers responsible for NVH are a group I feel sorry for when vehicle platform NVH issues come up as it often comes from another vehicle system with little consideration for NVH.

Vehicles are systems and changes can have cascading effects. If the component is designed and built by a supplier this makes the process even more difficult than a Ford designed product, which is built to Ford's specifications by a supplier its gets a little easier.

It tough because there is a business side to this as well, if transmission where flying apart we would have a serious leg to stand on, as would Ford with Getrag.

I can assure you that with Ford Service asking for you to take it to the dealer this issue is being talked about. I sit in meetings with issues like this all the time.

So the best thing you can do to help resolves this is reach out to Ford Service, the next time you are bringing the vehicle in so they can document the issue in a manner in which Ford can actually track it.


This being said I will be doing the same thing shortly.

2015 GTPP, a month old 4700 miles, very noticeable thudding. I will be contact the Ford Service Rep here to help appropriately escalate the issue so if get the visibility it needs.

This being said, I am not seriously considered with durability.

 

[imissmy2j]

I brought mine in. Same old tale. Brand new car that sounds like an old truck shifting. Very embarrassing.

Sorry to hear that man.

Let me start off by saying that I'm not Chris Harris or pretend to be. Also I'm not 50 yet, which to some people here is a big deal. Also i do agree that the trans is clunky and unrefined. Now, that's out of the way.

My car is stock, 100%, down to the fluid. 5.0 performance pack.
I learned to drive back in mother Russia on a dump truck with a giant 6.0 straight 6 diesel and 4 on the floor, gearbox with no synchhros.

Here's what really helped me minimize thuds,maybe it can help some people as well.
1. As been pointed out, it likes revs at the flywheel. So, instead of going gas off->clutch in - >shift, as you clutch in let off the gas. Hard to explain but literally try to make the rpms drop as little as possible between shifts. I can now successfully shift @1900 rpm or even lower with no thuds. And it won't wear the clutch, just makes things smoother.
2. With the shifter itself, going 1-2 and 2 -3. Instead give it time to synch up a little, go 1-n-2 don't do any mental counts just make a little stop at n. You might even feel a little bite from some gears engaging through the shifter when you do this. also as been said before, clutch in for a second at the red light and push the lever in first nice and easy. No thud.

Try this and see if with some practice it gets better. I agree Ford could've done heaps better with this trans and I was suuuper pissed having just dropped 40g on this thing. But, since for now they're not doing anything about it, I tried to learn to live with it. I now never have any comments about thuds from the wify or anyone who rides in the car. Hope this helps at least one person and they can start enjoying the motor again, because this 5 liter is one healthy beast.

 

[redline727]

I seen this on instagram, couldn't help but laugh. Thought I would share to lighten the mood.

 

[Stripler]

I just got my car yesterday and to my horror it has the thud when shifting into first or reverse! :shocked: I thought about returning my car immediately after driving off the lot. Almost in tears, I weighed my limited options.

Suddenly I had a revelation, turned off the 24/7 streaming of Trump's speeches I'd been watching about the sky falling, and I realized both my 2002 ws6 and 2005 GTO made the exact same noises. So do the two motorcycles I had/have. So have any high horse power manual transmission car I've ever driven.

Guys, I really wouldn't worry about it at all. If it bothers you that much, I'd get an automatic because I don't think it is a fixable issue, if it can even be considered an issue.

 

[Asharus]

http://www.subarubrzforum.com/42-su...smission-thud-into-first-gear.html#post266489

Perfectly normal. The gearbox is a constant mesh fully engaged gearset. The thud comes from the spinning first gear synchronizer assembly and input shaft complete with clutch plate being suddenly halted by engagement with the gearcluster.

I think you'll find that no thud occurs if you press the clutch and wait a few seconds which will show it isn't clutch drag (the other possible cause which would be a fault). You can also simply touch any synchronizer set, I tend to use second gear, to stop the input shaft before selecting first. One moves the shift lever towards selecting a gear until the synchronizer is reached but then you stop and pull back, followed by your desired gear. This can also be used to prevent the clash you sometimes get selecting reverse from rest. Anyway, the gearbox is built to withstand much higher loads than that thud.

Also, that thud tends to disappear in very cold weather because the gearbox oil gets thicker. Modern gearboxes use less viscous oil than in the past for efficiency reasons so there is less internal friction to slow the gears from stirring.

 

[redline727]

I don't think it's an issue. Like I said previously. This is my 2nd MT82 car. If I really though it was a problem I would have sacrificed the PP for a 6R80. I just found that IG post funny.

 

[Darkhelmet22]

Bought my car a month ago, first thing I noticed was the thud. I've gotten used to it but my 13 5.0 DID NOT do this. It seems the issue is worse with cars that have the torsen diff, my 13 was not a track pack car so it didn't have the torsen diff.

 

[redline727]

Bought my car a month ago, first thing I noticed was the thud. I've gotten used to it but my 13 5.0 DID NOT do this. It seems the issue is worse with cars that have the torsen diff, my 13 was not a track pack car so it didn't have the torsen diff.

Yeah my 13 didn't do it either. But also was just a premium GT as well. Only other s550 I drove was a PP ecoboost on a test drive. I can't recall if it did it or not. I don't see how the Torsen would make a difference though. Mechanically just putting it in first it acts like an open diff. And I driven a 240 with an SR20 swap with a welded diff and it didn't make the trans do anything like it, turning was annoying as shit though haha. I also never seen a thread about the Mt82 doing this on a s197 before. I just think maybe something changed on the s550 and it's a characteristic of the trans on this chassis. Would be curious to see if someone at Ford can compare part numbers to see what has been updated if anything internally in the transmission or the part number for the entire trans.

 

[Darkhelmet22]

Yeah my 13 didn't do it either. But also was just a premium GT as well. Only other s550 I drove was a PP ecoboost on a test drive. I can't recall if it did it or not. I don't see how the Torsen would make a difference though. Mechanically just putting it in first it acts like an open diff. And I driven a 240 with an SR20 swap with a welded diff and it didn't make the trans do anything like it, turning was annoying as shit though haha. I also never seen a thread about the Mt82 doing this on a s197 before. I just think maybe something changed on the s550 and it's a characteristic of the trans on this chassis. Would be curious to see if someone at Ford can compare part numbers to see what has been updated if anything internally in the transmission or the part number for the entire trans.

I had one guy with a 14 track pack say it did the same thing. Just seems funny all the guys having issues have PP cars.

 

[mustang_guy]

Ive driven two s550 base 6mt and have heard zero sounds. Havent driven a pp. No interest. Its a waste for what plan to do.

 

[madweazl]

Ive driven two s550 base 6mt and have heard zero sounds. Havent driven a pp. No interest. Its a waste for what plan to do.

I dont know how you couldnt feel or hear it. This has been an issue since the trans was released. My '12 was the same way. Never hurt anything and it never got worse.

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