Rev Flare into 2nd - 3/4 throttle

Engine, Trans & Driveline

  1. 66 Sat

    66 Sat Well-Known Member

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    I know there's a few threads with flaring revs but mine does it only under these circumstances:

    3/4 throttle from a stop, there is flare shifting from 1st to 2nd in D.

    2nd to 3rd is fine at all times.

    Full throttle in D there is no flare at any time.

    Manual shifting there is no flare at any time.

    Driving "normally" in D there is no flare at any time.

    727/318 poly. Transmission was checked and serviced by a shop before it went back into car. It's been like this for over 2 years now - just wondering if it could be causing any damage and if it's an easy diagnosis/fix?
     
  2. 493 Mike

    493 Mike FBBO Gold Member FBBO Gold Member

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    Excess slippage is never good. Check the KD band adjustment and the throttle pressure linkage first. Then check the pressures. This is all described in the FSM. Good luck!
    Mike
     
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    • 66Satellite47

      66Satellite47 FBBO Gold Member FBBO Gold Member

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      This needs attention, flare up no good. I suspect the kickdown linkage is slightly out of adjustment.
       
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      • dvw

        dvw Well-Known Member

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        If the kickdown linkage has been modified, the geometry could be wrong. It's possible that there is no throttle pressure increase at part throttle. If its flaring the KD band is more than likely already damaged.
        Doug
         
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        • vance.dykes

          vance.dykes Well-Known Member

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          did you check the fluid level ?
           
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          • 66 Sat

            66 Sat Well-Known Member

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            Fluid level is fine so it's not that. Thinking about it last night what I'm experiencing isn't exactly flare, or not what I've had previously when the kickdown wasn't adjusted properly - this feels like an "overshift", it's hard to describe. It's flare but still with acceleration, like clutch slip. I'll take it to the transmission shop and get the guy to come for a drive to show him.
             
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