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Author
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Topic: 1997 Thunderbird tranny issues?
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MustangNate
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Member # 4559
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posted
 
 
Okay, so I know it's hard to internet diagnose but this is perplexing me and I need some feedback. I have a 1997 Thunderbird LX w/3.8 v6 and 4r70W as a daily driver. Whenever I have the a/c on and I'm slowing down/at a stop/in gear the transmission makes a whirring sound, as soon as I turn the a/c off it stops. If I have the car in park/neutral it doesn't do this.
Any ideas?
Thanks in advance. ![[burnout]](graemlins/burnout.gif)
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1989 Mustang LX Vert, 5.0 Auto
Posts: 1032 | From: Chico | Registered: May 2004
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Secnd2nun64
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Member # 1431
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posted
I think there is a switch that is suppose to step up your idle when the A/C is on. Maybe that's it.
Posts: 1460 | From: CA | Registered: Jun 2002
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BIGBALLFACTOR
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Member # 7277
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posted
quote:
Originally posted by Secnd2nun64:
I think there is a switch that is suppose to step up your idle when the A/C is on. Maybe that's it.
your are correct a/c cut of switch is what it is caled
Posts: 6908 | From: okc | Registered: Dec 2006
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MustangNate
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Member # 4559
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posted
So you think I just need to replace that switch?
Sorry I am use to Mustang/Camaro/Trans-Am which I usually pull the a/c off of first thing but now I have a family and this is the family car so wife says it stays lol. All new to me.
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1989 Mustang LX Vert, 5.0 Auto
Posts: 1032 | From: Chico | Registered: May 2004
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BIGBALLFACTOR
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Member # 7277
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posted
[QUOTE]Originally posted by MustangNate:
So you think I just need to replace that switch?
Sorry I am use to Mustang/Camaro/Trans-Am which I usually pull the a/c off of first thing but now I have a family and this is the family car so wife says it stays lol. All new to me. [/QUOTE
if you know some at ford or has a snap on scanner have run it for codes
Posts: 6908 | From: okc | Registered: Dec 2006
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Secnd2nun64
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Member # 1431
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posted
Does the car idle lower than its suppose to? I'm thinking your problem is engine load related since the A/C adds addtional load to the engine when at idle. Did you check for vacuum leaks? Cracked/brittle hoses?
Posts: 1460 | From: CA | Registered: Jun 2002
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MustangNate
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Member # 4559
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posted
All vaccuum lines are new, it idles around 500 - 600rpm when in gear. Could it be the IAC?
[ June 17, 2010, 12:06 AM: Message edited by: MustangNate ]
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1989 Mustang LX Vert, 5.0 Auto
Posts: 1032 | From: Chico | Registered: May 2004
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