Gear Command reprogramming kit for GM 4L60E, 4L65E and 4L70E valve bodies that firms every shift and stops the 3-4 clutch from burning up at high RPM.
The TransGo 4L60E-PRO is for the 4L60E that has to live behind more engine than GM planned for: an LS-swapped hot rod, a cammed Camaro or Firebird, a street-strip truck, or a Silverado or Tahoe with power adders. TransGo calls it its most aggressive 4L60E calibration. It is the part people search for after a 3-4 clutch pack burns up at the top of 1st, after a 2-4 band lets go, or after chasing TCC slip and code P1870 on a modified vehicle. Part number TGO4L60E-PRO, for 4L60E, 4L65E and 4L70E units from 1996 to 2018.
This is more than a set of valve body springs. TransGo builds the PRO with parts for the valve body, servo, pump and accumulator, plus internal components, all calibrated for higher RPM and higher pressure so the shifts are short and firm and hold under full throttle. Some of the pieces that set it apart from a standard shift kit:
If the vehicle is stock and used as a daily driver or light tow rig, the PRO is probably more than you need. The milder TransGo SK 4L60E shift kit covers the same common wear complaints with a less aggressive feel. Our TransGo and Superior shift kit comparison walks through the choice, and if you are chasing a harsh shift rather than a soft one, read the 4L60E harsh shift guide first. A kit will not revive clutches that are already burnt; scan for codes and check the fluid before you buy, and use the 4L60E common problems guide to rule out solenoid and electrical faults.
TransGo lists the 4L60E-PRO for 1996-2018 GM 4L60E, 4L65E and 4L70E transmissions. It does not fit 1993-1995 units, the 2005 Corvette, or hybrid applications. The Gear Command option only applies to 1996-2008 units. Check your transmission ID tag or send us the year and VIN if you have a swap or a unit of unknown origin. Every other part for this family is in our 4L60E parts collection.
TransGo states the valve body portion can be installed in the vehicle on 1993-2006 units without an input speed sensor, but 2007 and later units with the input speed sensor need the transmission removed. The pump rings and the 3-4 clutch return springs also require removal, so for the full benefit of the PRO, plan it as part of a rebuild. Follow the instructions in order, keep removed valves and springs laid out as they came out, and use the supplied separator plate and gaskets. Pair it with fresh frictions and steels such as the 4L60E master rebuild kit with clutches and steels. Fill with Dexron VI, check the level hot, then clear the shift adapts with a scan tool like the GM bidirectional scan tool so the computer relearns on the new calibration.
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Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. TransGo lists it for 1996-2018 4L60E, 4L65E and 4L70E. It also does not fit the 2005 Corvette or hybrid applications.
The valve body parts can go in with the transmission in the vehicle on units without an input speed sensor, through 2006. 2007-up units with the input speed sensor, and the pump rings and 3-4 clutch springs on any year, require transmission removal.
It is TransGo's most aggressive 4L60E calibration, aimed at modified engines and high RPM. For a stock daily driver or tow vehicle, the standard SK 4L60E kit is usually the better fit.
It includes a new TCC isolator and regulator valve that addresses the worn bore behind most P1870 and P0894 slip codes. A failed converter or solenoid still has to be repaired separately.
Yes. Clear the transmission adapts with a scan tool after installation so the computer relearns shift timing with the new calibration.
Dexron VI ATF. Check the level hot in park with the engine idling.
