4L65E Shift Kit 1993-2014, new and ready to install. Fits the 4L65E. Ships fast from the USA.
If your 2001-2007 Silverado, Sierra, Tahoe, Yukon, Suburban or Avalanche with the 4L65E shudders on lockup, throws a converter slip code, or thumps into second while still shifting soft everywhere else, this is the kit transmission shops reach for to fix it without making the truck ride like a race car. The reference number on this listing, T74165, is the distributor number several parts houses use for TransGo's SK 4L60E SHIFT KIT valve body repair kit, which TransGo lists for 1993-2015 4L60E, 4L65E and 4L70E units. It is new, has a 1-year warranty and ships from the USA.
TransGo designed the SK as a durability kit with a mild feel. It raises line pressure only slightly and reworks the accumulation system so shifts become short and smooth instead of long and soft. A long shift is a slipping shift, and slip is heat. In a 4L65E pulling a trailer, that heat lands on the 3-4 clutch pack and the 2-4 band first. The kit also replaces the factory TCC regulator and isolator valves with a hardened, USA-made set whose longer lands ride on unworn sections of the bore. TransGo explains the chain plainly: the worn TCC regulator bore lets the converter clutch slip, the computer sees it and commands high line pressure, and the driver feels that as a harsh 1-2. Fix the bore and the harsh shift goes away along with the code. TransGo also includes TCC regulator parts for trucks with and without Active Fuel Management, so the kit handles the later calibrations in the family.
P1870 and P0894 can come from a failing converter or a TCC solenoid just as easily as from bore wear. Our Silverado 1500 4L65E shift problems guide walks through reading pressure control solenoid current and separating converter faults from valve body faults. A shift solenoid that never turns on will also give you a missing gear that no shift kit can fix, so run the checks in our 4L65E shift solenoid guide first. When the electrical side tests good and the complaint matches the list above, the valve body is where to look.
Our listing is titled 1993-2014; TransGo lists the SK 4L60E for 1993-2015 4L60E, 4L65E and 4L70E transmissions except hybrids. The 4L65E was only installed in 2001-2007 GM trucks and SUVs, so any factory 4L65E is covered. If you are building a 4L60E or 4L70E instead, the same kit fits those as well. Match the kit name on the box to your rebuilder's parts list, or send us your year and VIN. More parts for this transmission are on the 4L65E collection page.
| Fits | 4L65E 1993-2014 |
| Part type | Shift Kit |
| Condition | New |
| Brand | TransGo |
| Reference | T74165 |
| Ships | From the USA |
| Warranty | 1-year |
It is a distributor reference number used for the TransGo SK 4L60E SHIFT KIT valve body repair kit. TransGo's own part number is SK 4L60E.
Slightly. TransGo describes short, smooth shifts with a small line pressure increase, which makes it a good fit for a daily driven or towing truck that should not shift harshly.
TransGo includes TCC regulator valve parts for vehicles with and without AFM. Follow the instructions to pick the right ones.
When the harsh 1-2 comes from the computer raising line pressure in response to TCC slip, fixing the worn TCC regulator bore with this kit removes the cause.
If the truck ran with converter slip codes for a long time, test it and replace it if it is weak. It is easy to reach with the valve body off.
