700R4 TORQUE CONVERTER DRAINBACK ??
04-29-2012, 05:37 PM
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Car: 90 IROC 5.7 1LE CLONE 89 GTA 88IROC
Engine: 5.7TPI / 5.7TPI/ 5.7TPI/ 4.3 CMFI
Transmission: 700R4 UPGRADED 700R4STOCK700R4STOCK
Axle/Gears: 3.23 10 BOLT 3.27 9 BOLT 2.77 9BOLT
700R4 TORQUE CONVERTER DRAINBACK ??
700R4 FEELS LIKE SOMEONE PUSHED IN THE CLUTCH ON A MANUAL GEARBOX WHEN TRYING TO ACCELERATE. ENGINE RPMS SPIKE BUT NO DRIVE. SEEMS LIKE TRANSMISSION IS NOT EVEN THERE. PULLED DIPSTICK AND FLUID LEVEL IS VERY HIGH. LOOKS LIKE TRANSMISSION HAS BEEN OVERFILLED. TRANSMISSION ACTING LIKE T/C IS FULL OF AIR. DOES THIS INDICATE TORQUE CONVERTER DRAINBACK ??
Last edited by DRIVE2FAST; 04-29-2012 at 06:19 PM.
04-29-2012, 06:01 PM
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Car: seeking '90.5-'92 'bird hardtop
Engine: several
Transmission: none
Axle/Gears: none
Re: 700R4 TORQUE CONVERTER DRAINBACK ??
The ATF is supposed to drain back, as you call it, but not quickly / dramatically / completely, as you make yours seem. Maybe it has a loose, cheap high-stall converter, have you ever driven one before? If not, be aware that they feel looser with a 2.73:1 rear than with a 3.73:1 gear, but even so, they should make tire-spin easy once you bring the revs up enough.
04-29-2012, 06:36 PM
#3
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Re: 700R4 TORQUE CONVERTER DRAINBACK ??
This indicates your transmission isn't going into gear.
04-30-2012, 05:50 AM
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Car: 90 IROC 5.7 1LE CLONE 89 GTA 88IROC
Engine: 5.7TPI / 5.7TPI/ 5.7TPI/ 4.3 CMFI
Transmission: 700R4 UPGRADED 700R4STOCK700R4STOCK
Axle/Gears: 3.23 10 BOLT 3.27 9 BOLT 2.77 9BOLT
Re: 700R4 TORQUE CONVERTER DRAINBACK ??
IT DRIVES NORMAL AT LOW POWER SETTINGS BUT OPEN THE THROTTLE JUST HALF WAY AND IT COMPLETLY DISENGAGES. RPMS SPIKE. WORSE THAN SLIPPING . FEELS LIKE THE TRANSMISSION ISNT THERE. OUT TO LUNCH , NOBODY HOME. FLUID LEVEL IS EXTRMELY HIGH ON THE DIPSTICK ,,, ALL THE WAY TO S-BEND IN THE DIPSTICK WHEN WARMED UP. FLUID IS CLEAN AND SMELLS OK.
04-30-2012, 02:05 PM
#5
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Re: 700R4 TORQUE CONVERTER DRAINBACK ??
What was the last thing you were doing when it still drove normally?
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