Manual Trans. Thud when shifting

[EXP Jawa]

The more I think about it, the more I'm inclined to believe that it is a characteristic of the transmission, but it may well be exaggerated by the driveline. Added lash in any of the spline joints or the added multiplication of different R&P gear ratios make some variants seems worse than others. But I still think the root of the issue is in the gearbox.

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[Genxer]

I added the Steeda trans bracket bushing last night. Out of the box, there was too much nvh for me. I ended up lopping off the flat center section and tried it again. I may trim it a tiny bit more to my liking but now it's at a point I can live with. The shifting seems a little more positive and smooth, but not a day and night difference. The neutral to first gear thud is still there, but honestly it has never been enough to either worry or bother me. It may have diminished the thud a little. I don't recall a thud shifting between gears today. I have tossed around doing a Blowfish bracket. Maybe later. I did it mainly to make shifting feel and effort more consistent.

One thing I noticed with this trans from day one is 1-2 shifts can be notchy at low speeds. I simply ease it in, letting the trans mesh up and it's all good. When I get the rpm up and shift 1-2 it's smooth as I could want. Also, coming out of neutral to 1st, I almost never clutch it then immediately shift in. I rather give it a second or two after pushing in the clutch, then move the lever. I'm actually happy with the MT82, just learning it's idiosyncrasies.

 

[Budnr22]

Genxer, I had same experience. I also installed the shifter mount and that is giving me too much noise and vibration in the cabin. About to pull that out.

 

[Genxer]

Genxer, I had same experience. I also installed the shifter mount and that is giving me too much noise and vibration in the cabin. About to pull that out.

If it's the same part I installed, just cut the center tab off instead of taking it completely out. Nothing to lose.

 

[David@Steeda]

Genxer, I had same experience. I also installed the shifter mount and that is giving me too much noise and vibration in the cabin. About to pull that out.

Try drilling a hole in the middle of the bushing, that tends to lessen the NVH.


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[smokinzx14r]

Try drilling a hole in the middle of the bushing, that tends to lessen the NVH.


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Dave is right .. I Drilled a 7/8 hole in the bushing ..It really helps ....

 

[Walt1120]

I love the added NVH from my new steeda trans bushing. Finally eliminated some of the disconnected driver feeling of the car. Finally feel like me, the motor, and the trans are becoming close friends and I enjoy all the new feedback.

If you want quiet and smooth the trans cross-member bushing is probably not for you, but if you like driving a car that is more track like and more "solid", id def suggest the bushing.

Now im just waiting on the blowfish bracket to arrive :hail:

 

[Cars_1959]

Mine makes a thudding noise when shifting into 1st and 2nd and sometimes 3rd, and I hear/feel a much lighter thud when letting the clutch out, but only under easy driving conditions. When I'm accelerating briskly, all of the noises go away. The thud while shifting is the synchros. I figured it would go away in warmer weather, and as it broke in more. My theory about the light thud sound/feel when letting the clutch out is due to stiff clutch damping springs on the clutch plate itself, and not driveline slack (can also explain away some of the bucking while shifting that others including myself have experienced).

I'm honestly not worried about any of it at all. I have not yet had a missed shift, or hard to hit gear, or any other nastiness yet, just what I would consider normal manual transmission noises. I've never driven a manual transmission that didn't make its fair share of synchro and clutch noise. They are after all, a box full of gears rotating at high speed.

I don't have mine yet but I do remember the noises of the first generation 4 speed manual transmissions. The clicking of the then noisy shifter from gear to gear, the spinning of the first round of great syncros spinning that next gear and the whine of those gears during acceleration.



I'm staying tuned to find out if there is a fix or this thud indicates a future breakage that we shouldn't be responsible for.

 

[DesertStang]

We need someone to get his in writing and then sticky it

You can only imagine that a large majority of yet to join future members who get a 15+ PP are going to be posting about this, and it cant be expected of them to read through a 20+ page thread to see it is a common thing for these cars.

Just like myself, im sure everyone was a little concerned about the noise at one point. Just think if the internet didn't exist...

Just picked up my 15 PP and glad i started at the end of the thread... lol

 

[Genxer]

I talked to a trans shop about the MT82 and what they commonly see is synchro rings worn out. Not transmission breakage or anything. I assume what they have seen mostly is 5th gen transmissions since '15s haven't been out long and most are under warranty right now. For '15 Ford DID redesign the synchros, so there's a clue for us.

I'm going to get a Blowfish bracket in July/August. Especially since my wife may occasionally drive the car, I want her to have max feel and consistency.

 

[Tele5.0]

So, I noticed today (only 1,800 miles on the car) when I was going through a parking lot with speed bumps...I always push the clutch in and let off the gas going really slow over the speed bumps that there is a bunch of rattling sloppy slack sounding mess when taking load off of the drive train and or putting load back on. Is this part of the "seperation" that you guys are referring to? Everything just seems loose and sloppy underneath.

 

[foghat]

So, I noticed today (only 1,800 miles on the car) when I was going through a parking lot with speed bumps...I always push the clutch in and let off the gas going really slow over the speed bumps that there is a bunch of rattling sloppy slack sounding mess when taking load off of the drive train and or putting load back on. Is this part of the "seperation" that you guys are referring to? Everything just seems loose and sloppy underneath.

I wouldn't say I hear anything, but sometimes I do notice it feels (through the pedal, I guess) like something is still going on after depressing the pedal.

 

[mikeyjobu]

I definitely hear something going into a forward gear from a stop. I also feel like there's some noise or something almost "gritty" going from 2-3 sometimes -- I've been taking notice and paying very, very close attention to these posts and have trying to be very deliberate with my shifts. When I'm driving like a grandma, The shifts usually seem smoother. I really don't want to believe this is an issue -- I'm loving the car. I may try some BG Syncro Shift II.

 

[Genxer]

I've noticed the shifting is more notchy when the car is cold. After a good warm-up the 1-2 is noticeably better. I'm thinking that at least one factor might be fluid, but it could also be with my car being so new. It feels like things are smoothing out a little as I go along, but very gradually. People talk a lot about engine break-in but I hear nothing about the trans. It's a machine with close tolerances, just like an engine. That is why I have been shifting it easy from day one and never forcing it into gear. Sometimes it makes me pause a bit but I'm ok with that. Double clutching works like a charm but I'm not going to do that all the time.

 

[Walt1120]

Im really starting to believe that its the way we drive the car. I adjusted my driving habits and never get the thud anymore. When driving normally I kind of shift in a two part motion now, as in gently apply enough force to just pop out of gear and then put it into next gear, instead of going right from current gear to next gear in one motion. I think it gives more time for synchros to do their thing. I know it sounds like my shifts must be slower doing this but I can let the clutch out in one quick motion this way instead of slowing down a tiny bit at engagement like normal so that makes up for it. Plus theres no need to shift any quicker than that around town anyway. Im sure the blowfish bracket might have also eliminated any instances of the synchros/gears not perfectly matching up as well

Also I now know that the rev hang thing was really screwing me up at first. If driving normal I dont ease into the gas as im letting off the clutch at all when upshifting. My right foot just rests slightly on the gas pedal (just enough so that when I shift into next gear and let out the clutch the car maintains whatever speed im at and doesn't slow down). The rev hang does all the rpm matching for me and now im shifting smooth as can be with no thud at all. I also made the habit of pushing in clutch 2-3 secs before going into first to get rid of that thud as well

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