Just test drove a manual GT
12/6/04, 03:52 PM
#1
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I noticed both the gearbox noise, and the whine from the rear end upon deceleration.
None of my other manual Mustangs did this.
Has anyone found out whether there is more information on this issue?
Is there a Technical Service Bulletin for it? If not, I would think that there will be one issued later on.
None of my other manual Mustangs did this.
Has anyone found out whether there is more information on this issue?
Is there a Technical Service Bulletin for it? If not, I would think that there will be one issued later on.
12/6/04, 04:09 PM
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I just talked with the service manager from the Ford dealership I bought my 05 from. (my new best friend) :worship:
He looked through TSB's and found only one that pertained to the two noises mentioned.
The one TSB is for noises from the rear-end when making tight turns. The fix is an updated clutch pack in the posi-unit.
Nothing for whine on decel, or chatter on accel... yet !!
He looked through TSB's and found only one that pertained to the two noises mentioned.
The one TSB is for noises from the rear-end when making tight turns. The fix is an updated clutch pack in the posi-unit.
Nothing for whine on decel, or chatter on accel... yet !!
12/6/04, 04:36 PM
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I feel there is going to be a synchro-related TSB. The other day I took off, cool day (it was probably in the low 40's, maybe lower), and drove it hard after less than a minute of warm-up. Loud synchro rattling noise after a hard engine-braking was very noticeable, like one of the synchro's was sticking or rattling. Went away after I shifted down and up through the gears, and didn't come back. This wasn't a gear crunch/grind, it was even in neutral, like a synchro was rattling off axis or something.
I'm just going to wait until it gets worse, so they can find it easier. No biggy right now, synchros are doing their job, and the noise is intermittant (happened once)
I'm just going to wait until it gets worse, so they can find it easier. No biggy right now, synchros are doing their job, and the noise is intermittant (happened once)
12/6/04, 05:26 PM
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I posted about this earlier in the following link, but haven't received any responses yet.
http://forums.bradbarnett.net/index.php?showtopic=10887
I also found this info about gear noise on the following link.
http://www.dippy.org/svcman/sm03.html
It describes what I heard when I test drove the 05 auto. I've owned 3 other Mustangs and none made and noise during the "float or coast" situation mentioned below.
"Abnormal gear noise can be recognized easily because it produces a cycling tone and will be very pronounced through the speed range in which is occurs. Gear noise may be developed under one or more of the following conditions, “driveâ€, “road loadâ€, “float†or “coastâ€. Gear noise usually tends to peak in a narrow speed range or ranges. Gear noise is more prominent between 30 to 40 mph (48 to 64 km/h) and 50 to 60 mph (80 to 96 km/h). Abnormal gear noise is quite rare and if present it usually originates from scoring of the ring and drive pinion gear as a result of insufficient or improper lubrication of the axle assembly. If the gear noise is on coast at all speeds, check for a loose pinion nut and readjust per this manual if necessary.
When objectionable axle noise is heard, note the driving condition and speed range. Remove the housing cover. Perform a tooth contact pattern check to determine if the best possible pattern has been obtained. If pattern is found to be unacceptable, reshim and adjust to obtain the best possible tooth pattern. If after readjustment noise still persists, replace with new gear set."
http://forums.bradbarnett.net/index.php?showtopic=10887
I also found this info about gear noise on the following link.
http://www.dippy.org/svcman/sm03.html
It describes what I heard when I test drove the 05 auto. I've owned 3 other Mustangs and none made and noise during the "float or coast" situation mentioned below.
"Abnormal gear noise can be recognized easily because it produces a cycling tone and will be very pronounced through the speed range in which is occurs. Gear noise may be developed under one or more of the following conditions, “driveâ€, “road loadâ€, “float†or “coastâ€. Gear noise usually tends to peak in a narrow speed range or ranges. Gear noise is more prominent between 30 to 40 mph (48 to 64 km/h) and 50 to 60 mph (80 to 96 km/h). Abnormal gear noise is quite rare and if present it usually originates from scoring of the ring and drive pinion gear as a result of insufficient or improper lubrication of the axle assembly. If the gear noise is on coast at all speeds, check for a loose pinion nut and readjust per this manual if necessary.
When objectionable axle noise is heard, note the driving condition and speed range. Remove the housing cover. Perform a tooth contact pattern check to determine if the best possible pattern has been obtained. If pattern is found to be unacceptable, reshim and adjust to obtain the best possible tooth pattern. If after readjustment noise still persists, replace with new gear set."
12/6/04, 06:24 PM
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Originally posted by lodom@December 6, 2004, 6:29 PM
If pattern is found to be unacceptable, reshim and adjust to obtain the best possible tooth pattern. If after readjustment noise still persists, replace with new gear set."
If pattern is found to be unacceptable, reshim and adjust to obtain the best possible tooth pattern. If after readjustment noise still persists, replace with new gear set."
12/6/04, 07:13 PM
#9
I am not experience any noise on my car "knock on wood". The noise you guys are talking about sounds very familiar when I changed the gears on my 90 LX 5.0l. The guy that put the new gears in didn't set-up the gears properly and I had the whine as soon as I decelerated. After 1 week it was sooooo loud I went to another shop and had new gears installed.
12/6/04, 07:55 PM
#10
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Originally posted by M1Rifle@December 6, 2004, 3:39 PM
I feel there is going to be a synchro-related TSB. The other day I took off, cool day (it was probably in the low 40's, maybe lower), and drove it hard after less than a minute of warm-up. Loud synchro rattling noise after a hard engine-braking was very noticeable, like one of the synchro's was sticking or rattling. Went away after I shifted down and up through the gears, and didn't come back. This wasn't a gear crunch/grind, it was even in neutral, like a synchro was rattling off axis or something.
I'm just going to wait until it gets worse, so they can find it easier. No biggy right now, synchros are doing their job, and the noise is intermittant (happened once)
I feel there is going to be a synchro-related TSB. The other day I took off, cool day (it was probably in the low 40's, maybe lower), and drove it hard after less than a minute of warm-up. Loud synchro rattling noise after a hard engine-braking was very noticeable, like one of the synchro's was sticking or rattling. Went away after I shifted down and up through the gears, and didn't come back. This wasn't a gear crunch/grind, it was even in neutral, like a synchro was rattling off axis or something.
I'm just going to wait until it gets worse, so they can find it easier. No biggy right now, synchros are doing their job, and the noise is intermittant (happened once)
12/7/04, 08:02 AM
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Originally posted by snkbtn99@December 7, 2004, 6:59 AM
You guys just need to ditch the quiet exhaust and get a loude one .... Gear whine goes away immediately ....
Sorry ...
You guys just need to ditch the quiet exhaust and get a loude one .... Gear whine goes away immediately ....
Sorry ...
12/7/04, 02:23 PM
#13
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These new cars have lower axle ratios than the previous cars so they will sound a little different not necessarily should they be whining but you will hear the engine wind up quicker.
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