4T65E Shift Kit 1997, new and ready to install. Fits the 4T65E. Ships fast from the USA.
This is the TransGo SK4T65E Shift Kit, the valve body repair kit many transmission shops reach for when a 4T65E comes in with long shifts, a P1811 that keeps returning, converter clutch slip or no 4th. Although the listing title says 1997, TransGo states the kit fits every 4T65E from 1997 on, so it suits a 1999 Buick Century just as well as a 2008 Chevrolet Impala, 2005 Pontiac Grand Prix or 2010 Buick Lucerne. It is a new kit, made in the USA, and it is meant to be installed while the valve body is out for service or during an overhaul.
The 4T65E uses accumulators to cushion each clutch apply, and a pressure regulator and boost valves to set line pressure. Over time the factory regulator spring fades, the accumulator springs soften and the boost valve wears in its sleeve. Shifts stretch out, the computer measures the long shift time and keeps adding pressure until it runs out of adapts and sets P1811, and the unit can end up harsh at light throttle and slipping under load. TransGo's answer is not simply higher pressure. Per TransGo, the kit includes seven accumulator springs, three accumulator spacers, a pressure regulator upgrade spring and new boost valves, which restore a stable, known line pressure and shorten the shifts without making them rough.
A shift kit restores the hydraulic calibration; it cannot replace burned clutches, a stripped 4th clutch hub or a sticking solenoid. TransGo's own instructions call a sticking pressure control (EPC) solenoid the most common cause of P1811 and P0741 and tell installers to replace it every time, even on a clean low-mileage unit. So scan for codes, check fluid condition, and look at the pressure control side first. Our 4T65E harsh shift guide traces the P1811 pressure chain, and the no-overdrive guide covers the 4th clutch and hub failures that a kit will not fix.
TransGo lists the SK4T65E for all 4T65E transaxles built from 1997 on, including the TipTronic version used by Volvo and some Pontiac Grand Prix models. The listing adds one caution for TipTronic units: everything in the kit applies except the boost valve assembly. The kit is not tied to first- or second-design valve bodies, but the pressure control solenoid you pair with it must match your design year, so confirm that from your transaxle ID tag or send us your year and VIN. Browse the matching parts on the 4T65E collection page.
| Fits | 4T65E 1997 |
| Part type | Shift Kit |
| Condition | New |
| Brand | TransGo |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. It is the TransGo SK4T65E, which TransGo lists for every 4T65E from 1997 on, early and late design.
It is designed to shorten shifts without making them rough. If shifts feel firm at first, reset the adapts or drive 50 to 100 normal shifts so the computer relearns.
It corrects the faded regulator and accumulator springs and worn boost valve behind many P1811 cases, but TransGo also recommends replacing the pressure control solenoid, which is not included.
Yes, except for the boost valve assembly, which should not be used on TipTronic units.
The kit goes into the valve body and accumulators, so it can be installed during a valve body service with the side cover off, but most installers fit it during an overhaul when the clutches and seals are being renewed too.
