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Slipping 2-3 shift

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Old Aug 9, 2007 | 07:17 PM
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Zen Punk's Avatar
Zen Punk
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Slipping 2-3 shift

92 3.0 RWD

Can someone tell me the likely cause for the 2-3 shift to slip? If I keep constant acceleration, the engine will rev violently for a few seconds and then shift into 3rd at the shift point. If I let up on the throttle before the shift point, I can get it to shift much smoother, and I've been driving it like that for a while, but it's bothering me. The trans used to slip on every change when I got it, but I replaced the fluid & filter and modulator and now every shift is smooth except for 2-3. I haven't tightened the bands; are one of those involved in the 2-3 shift? Did I perhaps not seat the modulator correctly? Working space was tight because of the exhaust pipe/crossmember.

I appreciate any suggestions.
 
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Old Aug 9, 2007 | 09:25 PM
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96_4wdr
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From: Washington state
harsh 2>3 shift
http://autorepair.about.com/library/ts/at/bl-at-14.htm

soft or delayed 2>3 shift
http://autorepair.about.com/cs/troubleshooting/a/bl_45_at.htm

the A4LD has no EPC solenoid valve so scratch that one

modulator must be installed correctly or 1>2 shift would be harsh and late

probably your high-reverse clutch pack, valve body valve control for 2>3 shift or clutch pack piston seals

any particles, chunks in bottom of tranny pan when you changed ATF and filter?
 

Last edited by 96_4wdr; Aug 9, 2007 at 09:36 PM.
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Old Aug 9, 2007 | 09:34 PM
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I didn't notice any solid bits but there was a lot of thick black buildup on the bottom of the pan and sticking to the magnet. Should I try tightening the bands?
 
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Old Aug 9, 2007 | 10:19 PM
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band adjusts not the problem

fairly easy is drop valve body, clean and check 2-3 Shift Valve; 2-3 Throttle Valve Modulator Valve for wear and dirt
 
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Old Aug 10, 2007 | 11:35 AM
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You really think I could do that myself? I'm no transmission mechanic. Would it kill the trans to keep driving it as is?
 
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