The TCC slip code leads to the harsh 1-2 upshift as the ECM recognized the TCC slip and commands high line pressure to avoid further TCC slippage and damage. The torque converter clutch regulator valve bore is very prone to wear causing the TCC slip complaints and related code. Common complaints on this transmission are TCC slip or shudder, code P1870 or P0894, harsh 1-2 shift, double bump shifts, 2-3 flare up, burnt 3-4 clutch plates as well as inconsistent pressure boost problems. Note: this drum is not required or suggested if your drum meets inspection requirements.The TransGo 4L60E SHIFT KIT® Valve Body Repair Kit fits 1993 to 2015 General Motors vehicles equipped with the 4L60E, 4L65E and 4L70E automatic transmission.
I will not re-use a worn drum, as you will burn up the new band very quickly because the band will not have good flat contact with the drum. If your band has burned badly, the original drum may be worn in the center causing it not to be flat across the band surface.
This is not included in standard upgrade above, as I have not found these to be of concern in cars up to 500HP. This is one of the upgrades used in the 4L65E transmission. This is a new aftermarket unit, NOT REBUILT. This upgrade includes, a 13 vane rotor, vane rotor guide, pump slide, 13 vanes, 2 upgraded hardened heavy duty vane rings, O-ring, and slide seal (and no modifications are made to your pump housing).Īll billet Servo, 30 to 40% more surface area, higher clamping force on band.ĥ pinion planetary for all years of the 4L60E. This 13 vane pump will help to eliminate the line pressure fluctuations and high RPM pressure drop seen with the stock pump configurations. Stock, these transmissions have 10 vane pump. This unit is a must in high HP applications.ġ3 vane pump upgrade! Great for high HP, heavy abuse applications. With this new hardened unit, you will eliminate potential problems with hub failure (I lost my first tranny this way). This is one of the main weak points in these transmissions. "The Beast" sun gear shell for the 4L60E. This sprag will increase torque capacity in all forward gears. This new Transgo plate is made from tougher metal and is also zinc plated, to make it a very durable item.Ģ9 element forward sprag for 4L60E. Once these plates start wearing you will slowly start to lose shift quality, this can eventually lead to transmission failure. The stock plates wear out very quickly, even after 20,000-30,000 miles you'll notice excessive wear from the check balls.
Transgo separator plate for the 1996 4L60E.
This kit comes with three different valves to help completely recalibrate the shifts, and includes the large. This is not like other kits that just change a few springs and have you drill a few holes.
I think this is the most complete shift kit available and definitely the most reputable. You will also be able to downshift at any RPM. With this upgrade you'll be able to hold 1st, 2nd, & 3rd to any RPM. Performance Corvette Servo Kit with Servo Piston, Sleeve, O-rings & Sealing rings all gaskets, seals, o-rings, sealing rings, etc Heavy Duty Alto Kolene Steels Clutch Kit Performance Alto Red Eagle Friction Clutch Kit (or choice of Zpak if you insist)