What's new
CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.

Please Diagnose My Mustang

wilpetty

wilpetty

1/2 ton status
Joined
Oct 14, 2012
Posts
720
Reaction score
1
Location
Arlington, Tx
It makes a loud snap when I engage it into gear. My brothers friend thinks it is the clutch but I doubt it. It is a 5-speed and sometimes when I let of and get back on the gas it makes the sound too. (you know when you get back on a 5-speed in 5th and it sort of jumps) Well here is a vid.
Any input helps as this is my DD right now
THE SOUND
 
how does the shift feel? Does it feel like until you hear that snap that you arent transmitting power to the wheels?
 
Screw the pop noise, what's that ticking sound?

Maybe the gear is failing to fully disengage/engage.
The "snap" sound could be a shift collar popping into, or out of, place.
It would make sense that it would be LOUD under load, on gear engagement.

There's guys that'll have more input than I... But, that's the first thing I thought.
Does it happen in all gears, or what?
 
Sounds like something's loose in the trans. It's letting it spool up
Inside and slamming into gear. That's point 1. 2 I think maybe the blue oval out front is the orher problem. Lol. Sounds like you having lifter issues as well with that ticking.
 
rusty u-joint ready to go can cause SNAP sounds.

and check the oil level & condition in tranny . seen a few of the 5 speeds with internal problems.

also check brake pads for missing shims ( tin spacer clips ) can cause play and let pads bounce in bracket .

motor dont sound the best in the bottom end . or exaust leak from broken bolt problem ford has making the manifold blow out the gasket and tick tick tick sound.
 
Man, it is hard to tell. The list is fairly long that would make that noise.

I'm assuming that it does it when you let out on the clutch. Broken springs in the clutch hub would make a noise, but you usually get some clutch chatter along with it.

U-Joints usually have more of a pinging sound, but I have heard some make that noise.
Don't rule out a suspension problem though. If you have rear leafs, a loose u-bolt or broken kingbolt would cause noises when you first load them.
If its coils, then the radius bushings might be worn.

Try this. I have had it work before.
Turn the car off, put it in gear. I would try fifth and first, with fifth being the first one to try.
Put a guy at each end with someone with good ears in the middle alongside the car.
Have them push the car back and forth. Not up and down, just back and forth to the limits of the drivetrain.
Let it hit those limits pretty hard. Make sure of where it might go if it jumps out of gear, and be ready to stop it.

If its in the drivetrain, odds are it will make the noise, and you can move around and locate it.

If its a loose suspension, it might not make it, but you should see something if you put in on a lift.
 
I would start a search in the rear suspension. Check all the bushings for the control arms and/or torque arms. It sounds to me like rotational force on the axle is making that noise. Which would also explain why it happens at cruising speed when you coast and get back on it.
 
Thanks for all of the info guys! I do get a little chatter when the car is at idle. I don't know if that is bad or not. But when it makes the noise I swear I can feel it in the shifter a little. IDK if that may narrow it down. Someone also mentioned it was my rear diff maybe having no oil? I am thinking u-joint too though
 
place like 30 min from my house rents out lifts for 20 an hour...May have to go down there and check it out. If I wait my brother will take me to his shop when the owner isn't there and hopefully I will see what's wrong
 
Check tranny mounts

I worked on a buddy's Camaro once that had a similar issue. Turned out to be the transmission mounts were busted allowing the transmission to move freely on certain shifts.
Although looking at the vid your sound is different. Interesting tapping sound though...might want to look at that too.

Good luck with the search.
 
also: in neutral (wheels chocked!), grab the driveshaft near at the differential end and give it a good shake, make sure your pinion that goes into the diff doesn't flop all around. could be a back pinion support bearing or crush sleeve or something.

let us know what you find brother!
 
Fordum said:
Try this. I have had it work before.
Turn the car off, put it in gear. I would try fifth and first, with fifth being the first one to try.
Put a guy at each end with someone with good ears in the middle alongside the car.
Have them push the car back and forth. Not up and down, just back and forth to the limits of the drivetrain.
Let it hit those limits pretty hard. Make sure of where it might go if it jumps out of gear, and be ready to stop it.

If its in the drivetrain, odds are it will make the noise, and you can move around and locate it.

If its a loose suspension, it might not make it, but you should see something if you put in on a lift.
Click to expand...

Okay, I did what you said today and it made the noise! The sound is coming from an are very close the the differential. It is very loud but hard to pinpoint the exact spot. I did not see anything too bad other than there is a rubber deal right behind the differential that was moving quite a bit. I really think it is right behind the diff. Maybe right where the driveshaft goes. U-joints did't look bad or move weird while pushing. Suggestions?
 
Suggestions?
Click to expand...

Well........No safe ones.....

This might not work on a Mustang due to its ground clearance. I have done it on a Jeep and a couple of trucks, but I was young and stupid.

If there is room, you can get under the vehicle while they push it. You need to be sure to put some kind of positive stops front and real so it it jumps out of gear it will hit something before it runs over you.

Best move would be to find an old style grease pit where you can stand under it while they push it.
Then you can put your hand on various non-moving parts and feel the noise, plus use your hearing to figure out what is making it.

The fact that you can recreate the noise without the engine running is a big help. Eliminates several things, and removes the noise masking it.

Failing all those ideas, the next best thing is to jack up the entire rear end and try twisting the back wheels back and forth hard while its in gear.

If its in the drivetrain, then you may be able to make the noise. If its in the suspension, then you will probably not hear it.
Just don't do like I did and tie yourself up under a vehicle and let someone drive you around the parking lot to locate the noise........

Years after I did that, I read where a guy tied himself under a big dump truck and let someone drive him around the parking lot to locate the noise.

After a few minutes the driver turned off the truck and asked if he wanted him to stop.
No answer.

Guy got out, found his boss wound very tightly around the drive shaft...........
 
pull the driveshaft and flex the joints .

lots of times i have found no real play but when you pull the shaft and flex the joints by hand there frozen or binding up bad . this could be the noise next to the diff you heard.
 
Great suggestions guys :waytogo: I can barely squeeze under it, so the pit is the best option. I ordered new ujoints already, so I am going to see whether or not if it is the u joints for sure. Just being able to push the car is making this problem so much easier and gives me confidence I can find it. Will keep you guys posted if I find out what it is. Just for reference, what is the difficulty level and time estimate of fixing/or adjusting that lifter? Need my car to be running smoothly again
 
Replaced the tranny mount-didn't work
The issue was that one of the driveshaft bolts came loose.
Drove it around 15 min and didn't make the noise again
Thanks for your guy's help once again
:bow:
 
You must log in or register to reply here.

Latest Posts

Top Bottom