Clunk feeling while shifting

[KEVOP80]

I don't think you should have any clunk when not moving. But we can ignore that for now.

when you are moving, does the clunk happen in every gear or just 1st-2nd?

I suggest you show up at a Ford dealership in something other than your Mustang, and test drive a brand new PP. If its significantly different, then you probably have an issue.

I'll have to drive again to make sure if it's more than just 1st and 2nd. I'm sorta getting used to it, or else I could have answered you lol.

Could this be a linkage issue? Like I said, when i put it in gear slowly, when I'm stationary, no clunk. By all means, I'm definitely not slamming gears.....I didn't intend on racing or taking it to the track when i bought it. Could it be a sloppy driveshaft?

I also forgot to mention I bought it with 2200 miles on it.

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[GT Pony]

Let me give you a couple scenarios.

1) if at a red light, and i engage the clutch, and very slowly put it in 1st, nothing happens
2) if I'm daydreaming, staring out the window at god knows what, and the light turns green, i engage the clutch, quickly enter 1st (faster than 1st scenario) and i feel/hear the clunk.
3) while under load, mostly double clutching (just to test this out) nothing happens
4) shifting at about 3500 RPMs, it seems the clunk happens in between shifting gears. If you can picture that.

Sounds like possible excessive drive train play/slop. When you slowly engage the gear, there is much less "shock" to the system due to the gear syncro gradually loading the system and excessive play won't be detected. If you quickly slam it into gear, the system is shocked more and excessive play may show up as a "clunk".

If you go down the road in say 2nd or 3rd gear and then blip the throttle on/off quickly can you make the cluck happen? Doing that will load and unload the whole drive train, and if there's excessive play/slop you might hear the same clunking sound.

 

[KEVOP80]

Sounds like possible excessive drive train play/slop. When you slowly engage the gear, there is much less "shock" to the system due to the gear syncro gradually loading the system and excessive play won't be detected. If you quickly slam it into gear, the system is shocked more and excessive play may show up as a "clunk".

If you go down the road in say 2nd or 3rd gear and then blip the throttle on/off quickly can you make the cluck happen? Doing that will load and unload the whole drive train, and if there's excessive play/slop you might hear the same clunking sound.

What do you mean "blip" the throttle? The clunk only seems to happen when I initiate a gear change at a normal pace. If i engage the clutch, come out of gear, and rev match, I don't get anything. Again, I'm not screaming around town slamming gears, i drive very normally (probably my 5th RWD manual vehicle). If I'm, let's say, in 3rd gear crusing locally, and if I understand you correctly, "blip" the throttle, the only thing i hear if my wife bitching at me because her head slams against the recaros LMAO. But i get no clunk unless I'm shifting

 

[GT Pony]

What do you mean "blip" the throttle? The clunk only seems to happen when I initiate a gear change at a normal pace. If i engage the clutch, come out of gear, and rev match, I don't get anything. Again, I'm not screaming around town slamming gears, i drive very normally (probably my 5th RWD manual vehicle). If I'm, let's say, in 3rd gear crusing locally, and if I understand you correctly, "blip" the throttle, the only thing i hear if my wife bitching at me because her head slams against the recaros LMAO. But i get no clunk unless I'm shifting

If you blip the throttle on/of quickly while staying in one gear (to load and unload the drive train) and don't hear any clunking, then it must all be in the transmission as the syncro engages the gear.

 

[mustang1]

What do you mean "blip" the throttle? The clunk only seems to happen when I initiate a gear change at a normal pace. If i engage the clutch, come out of gear, and rev match, I don't get anything. Again, I'm not screaming around town slamming gears, i drive very normally (probably my 5th RWD manual vehicle). If I'm, let's say, in 3rd gear crusing locally, and if I understand you correctly, "blip" the throttle, the only thing i hear if my wife bitching at me because her head slams against the recaros LMAO. But i get no clunk unless I'm shifting

1st-2nd might be tricky when the transmission is cold, but otherwise you shouldn't get any clunking from the transmission when shifting gears. I don't have a torsen, so I don't know what sort of noise those make.

probably best to take it easy while the wife is in the car as the Mustang does not have a grab handle for passengers.

 

[KEVOP80]

1st-2nd might be tricky when the transmission is cold, but otherwise you shouldn't get any clunking from the transmission when shifting gears. I don't have a torsen, so I don't know what sort of noise those make.

probably best to take it easy while the wife is in the car as the Mustang does not have a grab handle for passengers.

Lmao. Duly noted . I'm going to go for a cruise now to pick up some chicks that my wife doesn't know about (totally kidding) so I'll do some different shifting and post about it

 

[PonyGrrrl]

There's already a 75 page thread about the clunk when shifting.
http://www.mustang6g.com/forums/showthread.php?t=11569

 

[KEVOP80]

There's already a 75 page thread about the clunk when shifting.
http://www.mustang6g.com/forums/showthread.php?t=11569

Thank you. I know this. I am well aware of the search button. As i stated, my clunk seems different. If you can't help troubleshoot my problem, why attempt at being a smartass? Considering you don't even know the transmission i have lol

 

[KEVOP80]

Right off the bat, i started the car, and let it warm up for a good 10 minutes (85 degrees out engine temp at 207). I went to put it in reverse, and right before it engages into reverse, clunk. Oit it back in neutral, slowly run thru the gear synchros, then reverse again, and nothing.

 

[PonyGrrrl]

Thank you. I know this. I am well aware of the search button. As i stated, my clunk seems different. If you can't help troubleshoot my problem, why attempt at being a smartass? Considering you don't even know the transmission i have lol

Really so you have an manual and it's not an MT82 transmission? That's what all manual S550 Mustangs come with, even if you have an auto I know what transmission they come with. The only thing that differs is the gear ratio or the Torsen rear. I was trying to be helpful and posted the other thread because I thought you might find something helpful there. I wasn't being a smartass but I guess you can't judge my tone in writing.

 

[KEVOP80]

Really so you have an manual and it's not an MT82 transmission? That's what all manual S550 Mustangs come with, even if you have an auto I know what transmission they come with. The only thing that differs is the gear ratio or the Torsen rear. I was trying to be helpful and posted the other thread because I thought you might find something helpful there. I wasn't being a smartass but I guess you can't judge my tone in writing.

My bad ponygrrrl, I've been on car forums for a very long time, and when someone has a serious concern, there was always that ine prick who chimed in and said"use the search button" or "there's multiple threads on this" so I apologize. I'm just frustrated. Please forgive me

Also, just went on a mini cruise and noticed that there was no clunk when over 5k, and also after 3rd gear. Going to drive some more. Really wish there was someone local that can experience this with me lol

 

[KEVOP80]

Really so you have an manual and it's not an MT82 transmission? That's what all manual S550 Mustangs come with, even if you have an auto I know what transmission they come with. The only thing that differs is the gear ratio or the Torsen rear. I was trying to be helpful and posted the other thread because I thought you might find something helpful there. I wasn't being a smartass but I guess you can't judge my tone in writing.

Btw, my car has Torsen limited-slip differential with 3.73 axle ratio

 

[PonyGrrrl]

My bad ponygrrrl, I've been on car forums for a very long time, and when someone has a serious concern, there was always that ine prick who chimed in and said"use the search button" or "there's multiple threads on this" so I apologize. I'm just frustrated. Please forgive me

Also, just went on a mini cruise and noticed that there was no clunk when over 5k, and also after 3rd gear. Going to drive some more. Really wish there was someone local that can experience this with me lol

I totally understand your frustration and I know what you mean about that person that chimes in with use the search button which is so annoying. If I don't have somethings helpful to offer the conversation I usually just move on. Sounds like your clunk is from the excess slop in the drivetrain. Kelly from BMR was discussing it in one of the suspension threads. I'll see if I can find it.

 

[GT Pony]

Right off the bat, i started the car, and let it warm up for a good 10 minutes (85 degrees out engine temp at 207). I went to put it in reverse, and right before it engages into reverse, clunk. Oit it back in neutral, slowly run thru the gear synchros, then reverse again, and nothing.

Try that again, but for the first time you put the transmission into gear, hold the clutch pedal to the floor for 30 seconds or more and see if it clunks the same.

It sounds like the clunk is made because the input shaft is still turning. But once you put the transmission into gear and then go through the other gears the input shaft has already been stopped so it doesn't clunk.

 

[GT Pony]

Also, many people install the softer Steeda clutch pedal assist spring which helps you modulate the clutch pedal better for smoother shifts. I think a lot of the 'clunking' is caused by un-smooth shifting caused by the crappy clutch pedal feel. I rarely hear any clunking from my GT.

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