These transmissions frequently wear out the reducing valve bore. As a result, complaints of brutal 6-4 kickdown bang are very common. The wear also causes erratic shifting complaints, flares or neutrals on shifts, gear ratio codes, and solenoid performance codes.

The purpose of reducing valves is to limit the pressure going to the solenoids. The spring is calibrated to prevent solenoid feed pressure from exceeding a predetermined PSI, no matter what main line pressure is. This is necessary to prevent more fluid from being fed to the solenoids than they can effectively regulate and limit what max line pressure output is. If the pressure feeding the solenoids is too high or too low, their output will also be too high or too low. As a result, shift quality complaints and codes can occur along with low or high main line pressure.

These valve bodies will work great once you replace the old reducing regulator valves with TransGo USA-made hardened steel valves. No expensive holding fixture required. Reusable high-quality USA-made steel reamer and heat-treated guide.

• Codes P0731, P0732, P0733, P0734 and P0735
• Brutal 6-4 kickdown bang
• Erratic shifting complaints
• Flares or neutrals on shifts
• Delayed engagements

• Reusable high-quality USA-made steel reamer
• Reusable high-quality USA-made heat-treated steel guide

TransGo Technical Support

If you are having trouble choosing the correct TransGo part, or have questions before, during or after installation of this part, TransGo's ASE Certified Technicians are available to help.

📞 Phone: 626-443-7451 (7:00am-4:00pm PST M-F)
📧 Email: support@transgo.com