Externally, all it needs is a 12-volt source and an engine-vacuum reference. However, if your trans is, in fact, a 4L60E, running it off a computer is mandatory. Never mind TCC lockup; without a computer, the trans won’t shift at all.
What is a manual shift valve body?
Manual / Automatic Valve Body It will let you shift manually or put the shifter into drive and the transmission remains full automatic. When shifting manually this valve body will remain in the gear until you select the next gear, and then provide you with a clean, crisp transition as you accelerate.
Do manual transmissions have valve bodies?
Valve Body Basics In a manual transmission you would have to push in the clutch and manually change the gears using the gear shifter. In an automatic transmission, the torque converter acts at the clutch and the valve body changes the gears. When you shift from park to drive, you are using the manual valve.
What is a reverse shift transmission?
why do people use the reverse pattern mostly? For drag racing, manual shift gives you more control over shift points; reverse pattern has you pulling the shifter away from neutral as you shift which is a safety feature. Manual shift removes the kickdown lever so that pressure in the valve body is constant.
What does a shift kit do for a 4L60E?
In short, an automatic transmission shift kit modifies the transmission’s shift timing in order to dramatically increase shift firmness and durability of the transmission components.
What makes a 4L60E Shift?
4L60E Transmission Only Shifts Manually This could be the VSS (vehicle speed sensor) or the TPS (throttle position sensor). Alternatively, there could be a problem with the wiring, such as a short or damaged circuit. Hopefully, diagnostics can work the problem out for you.
What does upgrading your valve body do?
A Valve Body Upgrade re-calibrates the hydraulic valve body to provide shorter duration shifts while under load. This is achieved by increased pressure and volume to enable the clutch packs to apply quicker and with greater clamping force, resulting in reduced wear and tear on the clutch packs.
What are common problems with 4L60E transmission?
Common problems with the 4L60E transmission include the third and fourth gears not working, slow or slipping reverse gear and sudden grinding noise in second gear.
How many solenoid are there in a 4L60E transmission?
The 4L60E family of transmissions use 2 shift solenoids, initially called Shift Solenoid A & Shift Solenoid B, later changed to comply with OBD II (On Board Diagnostics revision 2) regulations to 1-2 Shift Solenoid & 2-3 Shift solenoid.
Is the 4L60E transmission an automatic or manual?
The 4L60E (and similar 4L65E) is a series of automatic transmissions from General Motors. Designed for longitudinal engine configurations, the series includes 4 forward gears and 1 reverse gear.
