Auto transmission question

[Archive]

My 91 4x4's automatic transmission cold performance has generated yet another question. When the truck has sat for a day or so the transmission is slow to respond to my first gear selection. I usually have it in the garage and fire it up, give it 30-60 seconds of idling then put it in reverse or drive. If I give it gas right away the transmission doesn't grab. After about 5 seconds in gear it grabs and performs normally in all aspects. Does anybody else experience this? I think all of the fluid is draining out of the torque converter because of it sitting for a day or so. Anybody know?

Pat Daniels
91 4x4 4 speed-automatic 112,000 miles

 

[Archive]

CoastyAV8R, you've nailed it. The converter is leaking down. My "89" gas burner and my old 78 did the same thing. On the first crank up, I go to neutral first thing, it'll pump up faster. I've been a lot of miles with this condition, for me at least, it's not been a problem or resulted in any failures.

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"95" 3500, 4WHD, Ext cab. SLT, 5 spd, 4. 10 LSD, Rancho 9000's PacBrake, running boards, Mopar mud flaps, 35000 LB. gooseneck ball on home engineered attachment system, , pulling a 6,000 lb. three axle backhoe trailer, hauling a 14,000 lb. hoe,or a 6,300 lb. King 4 horse inline trailer (total loaded weight; 11,300)

1970 340 Duster, 4 spd, 3. 55's, 1968,318 factory air Barracuda convertable. .

 

[Archive]

I haven't done it personally, but it is common to install a check valve in the transmission cooler line to prevent fluid drainback - (called an anti-drainback valve?)



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'95 2500 4x4, A/T, Emerald Green, TST 250hp plate, gauges@A-Pillar, Alcoa wheels