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#11
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Hum after rear-end gear change
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#12
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Hum after rear-end gear change
"88 Mustang GT Conv." > wrote in message ... > I'm coming to all of you as the experts. > > I've recently had my gears changed in my 1988 5.0L convertible to > 3:73:1. (I only have 152,000KM on the car) There's a humming noise > which comes from the rear-end which gets significanltly louder between > 60-90 KM / Hr. > > I was told by the mechanic that this is a common thing with the gears > and should be ignored. > > Just wanting to get some thoughts/opinions. > > The mechanic I'm dealing with is great and has always done excellent > work on the car. He goes over and above what I've asked him to do with > little cost. > > I'm just thinking that it should be normal as it can become quite > annoying. > > Thanks in advance, > Marc I had a rebuilt engine put in, went to solid mounts, new clutch, and they changed out the oil in the rear end. And ended up with a lot more drive train noise around 65 to 80 MPH, very noticeable, in any gear with clutch engaged. After driving it for a few months, it is gone. I think the angle of engine to drive shaft was off. (only like 4 degrees or so total) If it was just gears, it should not have a resonance 60 to 90 km/hr, should be noisy proportional to speed, seems like the tires/driveshaft would have to be involved too. Let us know what you fine out. |
#13
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Hum after rear-end gear change
88 Mustang GT Conv. wrote:
> I've recently had my gears changed in my 1988 5.0L convertible > to 3:73:1. (I only have 152,000KM on the car) There's a humming > noise which comes from the rear-end which gets significanltly > louder between 60-90 KM / Hr. > > I was told by the mechanic that this is a common thing with the > gears and should be ignored. Let me guess. If you're cruising at speed with a light throttle, and then lift your foot off the gas, the noise goes away (or gets significantly quieter). Sounds like it wasn't set up properly. Cheers! zëkë -- '65 Fastback 289/4-speed/3.50s '91 LX Hatchback 5.0/5-speed/3.08s (MIA since Feb'00) '97 GT 4.6/5-speed/3.23s (the winter beater) |
#14
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Hum after rear-end gear change
Zeke-baby > wrote in
: > Sounds like it wasn't set up properly. Pretty much what everyone in this thread has said. The best way to go about it is to get a complete used differential/axle with the ratio you want. Ford rear ends take a very long time to wear out. The only one I ever had that made any appreciable noise was an 8" that had over 600,000 miles on it. The 8.8 in my '71 Galaxie has over 240,000 on it, and is quiet as a mouse. On the other hand, mechanics who don't understand how to set a rear end up properly (and they are few and far between now) can cause a lot of trouble in a heartbeat. I read over the procedure in my 1969 Chilton's book, and it isn't anything I would want to tackle. |
#15
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Hum after rear-end gear change
On Jul 31, 12:19*am, Zeke-baby >
wrote: > 88 Mustang GT Conv. wrote: > > > I've recently had my gears changed in my 1988 5.0L convertible > > to 3:73:1. (I only have 152,000KM on the car) There's a humming > > noise which comes from the rear-end which gets significanltly > > louder between 60-90 KM / Hr. > > > I was told by the mechanic that this is a common thing with the > > gears and should be ignored. > > Let me guess. *If you're cruising at speed with a light throttle, > and then lift your foot off the gas, the noise goes away (or gets > significantly quieter). > > Sounds like it wasn't set up properly. > > Cheers! > > * * * * * * * * * * * * * * * * * * * * * * * * * * * * *zëkë > > -- > '65 Fastback 289/4-speed/3.50s > '91 LX Hatchback 5.0/5-speed/3.08s (MIA since Feb'00) > '97 GT 4.6/5-speed/3.23s (the winter beater) This is exactly what happens. The noise is less significant (although not gone) when the throttle is released. To answer some other questions. The gears were provided by the mechanic and I don't know the brand. I'm not a car buff (I like a nice car but know little about them) and therefore rely heavily on other people's knowledge experience. The car is an automatic and I have 2" flowmaster exhaust (which make enough noise on their own) and the humm overpowers them easily at that speed range (with the top up or down). Thanks to everyone, I will contact the mechanic and discuss with him. Marc |
#16
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Hum after rear-end gear change
On Wed, 30 Jul 2008 05:29:27 -0700 (PDT), "88 Mustang GT Conv."
> wrote: >I'm coming to all of you as the experts. > >I've recently had my gears changed in my 1988 5.0L convertible to >3:73:1. (I only have 152,000KM on the car) There's a humming noise >which comes from the rear-end which gets significanltly louder between >60-90 KM / Hr. > >I was told by the mechanic that this is a common thing with the gears >and should be ignored. > >Just wanting to get some thoughts/opinions. > >The mechanic I'm dealing with is great and has always done excellent >work on the car. He goes over and above what I've asked him to do with >little cost. > >I'm just thinking that it should be normal as it can become quite >annoying. > >Thanks in advance, >Marc Similar problem. Had the differential checked as a speed shop. Not a thing wrong with the unit. When they put it back together, no sound. The only change was the posi lube that gets mixed in. The speed shop said to only use the Ford posi lube. Have not had a bit of problem since. Nice and quiet. As I recall, and I can tell you what it calls for, but they used 2 tubes of the Ford posi lube. |
#17
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Hum after rear-end gear change
On Jul 31, 6:54 pm, Spike > wrote:
> On Wed, 30 Jul 2008 05:29:27 -0700 (PDT), "88 Mustang GT Conv." > > > > > wrote: > >I'm coming to all of you as the experts. > > >I've recently had my gears changed in my 1988 5.0L convertible to > >3:73:1. (I only have 152,000KM on the car) There's a humming noise > >which comes from the rear-end which gets significanltly louder between > >60-90 KM / Hr. > > >I was told by the mechanic that this is a common thing with the gears > >and should be ignored. > > >Just wanting to get some thoughts/opinions. > > >The mechanic I'm dealing with is great and has always done excellent > >work on the car. He goes over and above what I've asked him to do with > >little cost. > > >I'm just thinking that it should be normal as it can become quite > >annoying. > > >Thanks in advance, > >Marc > > Similar problem. Had the differential checked as a speed shop. Not a > thing wrong with the unit. When they put it back together, no sound. > The only change was the posi lube that gets mixed in. The speed shop > said to only use the Ford posi lube. Have not had a bit of problem > since. Nice and quiet. As I recall, and I can tell you what it calls > for, but they used 2 tubes of the Ford posi lube. guessing you are talking about the "friction modifier"... helps the clutches slip when you go around corners... without it they'll chatter a bit.. |
#18
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Hum after rear-end gear change
88 Mustang GT Conv. wrote:
> On Jul 31, 12:19 am, Zeke-baby > > wrote: >> 88 Mustang GT Conv. wrote: >> >>> I've recently had my gears changed in my 1988 5.0L convertible >>> to 3:73:1. (I only have 152,000KM on the car) There's a humming >>> noise which comes from the rear-end which gets significanltly >>> louder between 60-90 KM / Hr. >>> I was told by the mechanic that this is a common thing with the >>> gears and should be ignored. >> Let me guess. If you're cruising at speed with a light throttle, >> and then lift your foot off the gas, the noise goes away (or gets >> significantly quieter). >> >> Sounds like it wasn't set up properly. >> >> Cheers! >> >> zëkë >> >> -- >> '65 Fastback 289/4-speed/3.50s >> '91 LX Hatchback 5.0/5-speed/3.08s (MIA since Feb'00) >> '97 GT 4.6/5-speed/3.23s (the winter beater) > > This is exactly what happens. The noise is less significant (although > not gone) when the throttle is released. > > To answer some other questions. The gears were provided by the > mechanic and I don't know the brand. I'm not a car buff (I like a nice > car but know little about them) and therefore rely heavily on other > people's knowledge experience. > > The car is an automatic and I have 2" flowmaster exhaust (which make > enough noise on their own) and the humm overpowers them easily at that > speed range (with the top up or down). > > Thanks to everyone, I will contact the mechanic and discuss with him. > > Marc I think I'd get another mech to check it, someone recommended by people from a track. Also 2" exhaust? THe stock Mustang pipes are 2 1/4" the upgrade is usually 2 1/2 or 3" -- TEACHER: Harold, what do you call a person who keeps on talking when people are no longer interested? HAROLD: A teacher |
#19
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Hum after rear-end gear change
John S. wrote:
> On Jul 31, 6:54 pm, Spike > wrote: >> On Wed, 30 Jul 2008 05:29:27 -0700 (PDT), "88 Mustang GT Conv." >> >> >> >> > wrote: >>> I'm coming to all of you as the experts. >>> I've recently had my gears changed in my 1988 5.0L convertible to >>> 3:73:1. (I only have 152,000KM on the car) There's a humming noise >>> which comes from the rear-end which gets significanltly louder between >>> 60-90 KM / Hr. >>> I was told by the mechanic that this is a common thing with the gears >>> and should be ignored. >>> Just wanting to get some thoughts/opinions. >>> The mechanic I'm dealing with is great and has always done excellent >>> work on the car. He goes over and above what I've asked him to do with >>> little cost. >>> I'm just thinking that it should be normal as it can become quite >>> annoying. >>> Thanks in advance, >>> Marc >> Similar problem. Had the differential checked as a speed shop. Not a >> thing wrong with the unit. When they put it back together, no sound. >> The only change was the posi lube that gets mixed in. The speed shop >> said to only use the Ford posi lube. Have not had a bit of problem >> since. Nice and quiet. As I recall, and I can tell you what it calls >> for, but they used 2 tubes of the Ford posi lube. > > guessing you are talking about the "friction modifier"... helps the > clutches slip when you go around corners... without it they'll chatter > a bit.. "Whale oil" There are synthetics of that stuff now by Amsoil and Synergyn -- TEACHER: Harold, what do you call a person who keeps on talking when people are no longer interested? HAROLD: A teacher |
#20
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Hum after rear-end gear change
On Jul 31, 7:27*pm, "WindsorFox<SS>" > wrote:
> 88 Mustang GT Conv. wrote: > > > > > > > On Jul 31, 12:19 am, Zeke-baby > > > wrote: > >> 88 Mustang GT Conv. wrote: > > >>> I've recently had my gears changed in my 1988 5.0L convertible > >>> to 3:73:1. (I only have 152,000KM on the car) There's a humming > >>> noise which comes from the rear-end which gets significanltly > >>> louder between 60-90 KM / Hr. > >>> I was told by the mechanic that this is a common thing with the > >>> gears and should be ignored. > >> Let me guess. *If you're cruising at speed with a light throttle, > >> and then lift your foot off the gas, the noise goes away (or gets > >> significantly quieter). > > >> Sounds like it wasn't set up properly. > > >> Cheers! > > >> * * * * * * * * * * * * * * * * * * * * * * * * * * * * *zëkë > > >> -- > >> '65 Fastback 289/4-speed/3.50s > >> '91 LX Hatchback 5.0/5-speed/3.08s (MIA since Feb'00) > >> '97 GT 4.6/5-speed/3.23s (the winter beater) > > > This is exactly what happens. The noise is less significant (although > > not gone) when the throttle is released. > > > To answer some other questions. The gears were provided by the > > mechanic and I don't know the brand. I'm not a car buff (I like a nice > > car but know little about them) and therefore rely heavily on other > > people's knowledge experience. > > > The car is an automatic and I have 2" flowmaster exhaust (which make > > enough noise on their own) and the humm overpowers them easily at that > > speed range (with the top up or down). > > > Thanks to everyone, I will contact the mechanic and discuss with him. > > > Marc > > * *I think I'd get another mech to check it, someone recommended by > people from a track. Also 2" exhaust? THe stock Mustang pipes are 2 1/4" > the upgrade is usually 2 1/2 or 3" > > -- > > TEACHER: Harold, what do you call a person who keeps on > * * * * * talking when people are no longer interested? > > HAROLD: A teacher- Hide quoted text - > > - Show quoted text - Sry...miss typed and didn't verify. I do have 3" pipes Marc |
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