How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Dave Nova Your Own Question
Dave Nova
Dave Nova, ASE Certified Tech
Category: Transmissions
Satisfied Customers: 19452
Experience:  ASE Master Certification. 25 yrs experience
Type Your Transmissions Question Here...
Dave Nova is online now
A new question is answered every 9 seconds

4l60e transmission from a stop t the gas real hard made a

Customer Question

4l60e transmission from a stop hit the gas real hard made a loud noise no drive or third drove home would move to 3rd or 4th if I put it there manualy then pop out replaced transmission tore old one apart cannot find any damage did not test soledoids yet
Submitted: 1 year ago.
Category: Transmissions
Expert:  Dave Nova replied 1 year ago.

The problem is not in the solenoids or any of the hydraulically applied clutch packs. The problem is in the one way sprag clutch. This is a mechanical clutch that holds in one direction but free wheels in the other direction. This is called the input sprag or forward sprag. When launching hard with one of these transmissions, it is advisable to put transmission shifter in manual Low 1 range. There is another hydraulic clutch that applies over the sprag clutch for additional holding power (also gives engine braking in Low 1 range)