Transmission takes too long to shift
November 4th, 2018, 08:29 PM
#1
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Join Date: Sep 2018
Posts: 18
Transmission takes too long to shift
'64 Dynamic 88 takes WAAAYYYYY too long to shift. Stays in first gear until about 30 miles per hour using light throttle. Need to lift off accelerator to let it shift. Any suggestions? (394 with hydramatic)
November 5th, 2018, 07:48 AM
#2
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Join Date: Jan 2009
Location: USA Ohio
Posts: 708
Shorten relay rod to transmission (not shift range lever) at bell crank attachment point on firewall. Don't disturb the shorter rod coming forward to carb, unless you know it has been goofed previously. Turn long rod inward about three turns to start, test drive when warm, repeat if needed. If doing this raises the engine idle off of the idle set screw, then the short rod has been tampered. Lengthen only enough to return to set screw idle setting, and do this only if necessary. Be ABSOLUTELY CERTAIN fluid level checked hot on level ground running in park is at correct level, This detail is crucial as trans fluid pan is shallow. Trans should shift out of first quickly when moving from a stop, 2-3 might seem delayed but is much later with a big RPM drop, shift to high is often hard to detect without a tach or vacuum gauge. Good luck
Last edited by coldwar; November 5th, 2018 at 07:50 AM.
November 6th, 2018, 12:36 PM
#3
Registered User
Join Date: Feb 2011
Posts: 1,167
Shorten relay rod to transmission (not shift range lever) at bell crank attachment point on firewall. Don't disturb the shorter rod coming forward to carb, unless you know it has been goofed previously. Turn long rod inward about three turns to start, test drive when warm, repeat if needed. If doing this raises the engine idle off of the idle set screw, then the short rod has been tampered. Lengthen only enough to return to set screw idle setting, and do this only if necessary. Be ABSOLUTELY CERTAIN fluid level checked hot on level ground running in park is at correct level, This detail is crucial as trans fluid pan is shallow. Trans should shift out of first quickly when moving from a stop, 2-3 might seem delayed but is much later with a big RPM drop, shift to high is often hard to detect without a tach or vacuum gauge. Good luck
November 6th, 2018, 02:05 PM
#4
Oldsdruid
Join Date: Dec 2007
Location: Southside Vajenya
Posts: 10,284
Nope. ColdWar is right. There's a thing in the coupling called an Accel-A-Rotor that is where the 1-2 "shift" occurs, within about 10 feet of the car starting to move forward. 2-3 is the big ratio drop.
What can I say? SlimJims, like cats, are just weird! And why Olds stuck with them, who knows? Cadillac wouldn't have anything to do with them, and Pontiac used them only in their short wheelbase cars, opting for 4-speed Super HydraMatics in Bonneville and Star Chief. Buick was too busy trying to convince everyone of the superiority of DynaFlows to even try one, even after they'd abandoned the torque tube drive that a HydraMatic would have torn up in short order...
What can I say? SlimJims, like cats, are just weird! And why Olds stuck with them, who knows? Cadillac wouldn't have anything to do with them, and Pontiac used them only in their short wheelbase cars, opting for 4-speed Super HydraMatics in Bonneville and Star Chief. Buick was too busy trying to convince everyone of the superiority of DynaFlows to even try one, even after they'd abandoned the torque tube drive that a HydraMatic would have torn up in short order...
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