unecessary shifting while driving

1991 CHEVROLET S-10
6 CYL • 4WD • AUTOMATIC
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HOTRODDER69
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  • 7 POSTS
My 1991 Chevy S10 4x4 has a 4.3 v6 and 700R4. Anytime it is rainy/dewey/cool outside, it downshifts repeatedly, but then goes right back up in a heartbeat. Almost like a hiccup, but I know it's not a misfire. So the transmission is unecessarily shifting while cruising. I changed the tranny fluid and filter but it still does it. Any ideas? Any help would be greatly appreciated
Mar 22, 2011 at 10:50 PM
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WRENCHTECH
  • ✓ASE Certified Mechanic
  • 20,761 POSTS
  • ASE Certified Mechanic
Is the check engine light coming on at all?
Mar 22, 2011 at 11:56 PM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
best thing here is to take it to a trans guy and have him diagnose this. you may have an electrical problem at the trans that causes this.
Mar 24, 2011 at 10:16 PM
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