Is the direct clutch working on the 4L80-E?
(Remember, keep the pressure gauge on the outside of the vehicle if it is a mechanical gauge. This will prevent oil ending up inside the car if there happens to be a leak from the gauge or hose). 3rd and 4th gear are present: we know the direct clutch is capable of working and is good.
What to do if your 4L80E is stuck in 2 from 3?
P-R-N-D work, upshifts mostly work, no downshift into 1 from 2 or to 2 from 3, “stuck” in a certain gear: Pull out the wallet and grease pan. You have to replace the solenoids that control the 1-2 and 2-3 shifts, the “A” and “B” solenoids respectively (the 3-OD shift is not controlled via a solenoid…more on that later).
What are the problems with the 4L80E transmission?
No shift into OD under acceleration; OD will not hold under load and can hear or feel trans shift to OD when throttle is let off but slips into 3rd when throttle applied; sudden erratic lugging condition in lower gears when manually shifting: Bad news: this is going to involve a lot more time and money to fix this problem.
What causes a clutch pack to burn up?
This may be caused by warpage or distortion, incorrect loading of curved discs or pistons, the wrong thickness of plates, or incorrect pack clearance. Re-manufacture with new clutch plates and seal rings. The contaminants may be embedded in the clutch plates or may have constricted oil passages.
Is there an upgrade to the 4L80E direct clutch piston?
All OEM 4L80E Direct Clutch Piston fall short in performance applications. This kit includes all of the necessary components to upgrade the OEM 4L80E direct clutch piston for heavy duty/high performance use. Furnishes a huge increase in direct clutch torque capacity. $89.99 /Each.
This may be caused by warpage or distortion, incorrect loading of curved discs or pistons, the wrong thickness of plates, or incorrect pack clearance. Re-manufacture with new clutch plates and seal rings. The contaminants may be embedded in the clutch plates or may have constricted oil passages.
No shift into OD under acceleration; OD will not hold under load and can hear or feel trans shift to OD when throttle is let off but slips into 3rd when throttle applied; sudden erratic lugging condition in lower gears when manually shifting: Bad news: this is going to involve a lot more time and money to fix this problem.
P-R-N-D work, upshifts mostly work, no downshift into 1 from 2 or to 2 from 3, “stuck” in a certain gear: Pull out the wallet and grease pan. You have to replace the solenoids that control the 1-2 and 2-3 shifts, the “A” and “B” solenoids respectively (the 3-OD shift is not controlled via a solenoid…more on that later).