4T65E Solenoid Kit 1997-2002, new and ready to install. Fits the 4T65E. Ships fast from the USA.
If your 1997-2002 Buick Century, LeSabre or Regal, Chevrolet Impala or Monte Carlo, Pontiac Grand Prix or Oldsmobile Intrigue has started shifting late and soft, flaring between gears, refusing to lock the converter at highway speed, or dropping into a high-gear limp mode, the electrical side of the 4T65E valve body is the first place to look. This kit is a new, complete set for the first-generation 4T65E. The product photo shows four individually boxed GM-brand solenoids (two coil-type shift solenoids, a pressure control solenoid and a converter clutch PWM solenoid) plus the multi-port fluid pressure switch plate, so every electrical part bolted to the valve body is replaced at once.
The 4T65E arrived for 1997 as GM's electronic development of the 4T60-E, with the engine computer taking over shift timing and line pressure. Two on/off shift solenoids are switched in combination to pick first through fourth gear. The pressure control solenoid is pulsed to set line pressure, which decides how firmly each clutch applies, and the PWM solenoid ramps the torque converter clutch on and off. The flat plate with the round diaphragms is the pressure switch assembly; it tells the computer which range the manual valve is in, so a leaking diaphragm can confuse gear and range logic. All of the solenoids draw oil from the actuator feed limit valve in the channel plate, which Sonnax lists at a 115 psi maximum.
Transmission Digest notes that P1811 is also set by excess clearance in the 2nd and 3rd clutch packs. New solenoids will not fix burnt clutches, so confirm the cause first.
Pull codes and watch shift adapts and commanded versus actual line pressure on a scan tool. Check solenoid resistance at the case connector, then directly at each solenoid, so you do not buy parts for a broken wire. If the electrical checks pass and line pressure is still erratic, the channel plate AFL bore may be worn. Our 4T65E pressure control solenoid guide covers the line pressure checks, and the 4T65E common problems guide helps separate solenoid faults from clutch wear.
This kit is listed for 1997-2002 4T65E transaxles. These early units use a different pressure switch plate and harness routing than later cars, and the kit is built around that early layout. Before ordering, lay your old parts next to the product photo and compare connector shapes and the hole pattern on the switch plate, or send us your year and VIN to check. For 2003 and later cars see the 2003-2011 solenoid kit, and browse every year in the 4T65E parts collection.
The valve body and solenoids sit behind the side cover on the driver's side of the transaxle, and access to the cover is tight in these engine bays; depending on the car, plan on supporting the engine and moving components out of the way for clearance. Mark each solenoid's location, fit new O-rings, and torque the valve body and side cover bolts in sequence. Inspect the internal harness for brittle insulation and cracked connectors; a heat-damaged loom on a high-mileage car is worth replacing with the 1997-02 internal wiring harness. If the bores are scored, a 1997-2002 4T65E valve body is the better repair. Refill with Dexron VI, which GM approves as a service fill for older Dexron III units, then clear codes, reset adapts and drive through several full shift cycles so the computer relearns.
| Fits | 4T65E 1997-2002 |
| Part type | Solenoid Kit |
| Condition | New |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is listed for 1997-2002 4T65E transaxles, used in cars such as the Buick Century, LeSabre and Regal, Chevrolet Impala and Monte Carlo, Pontiac Grand Prix and Oldsmobile Intrigue. Match your parts to the photo or send your year and VIN.
The product photo shows two shift solenoids, a pressure control solenoid, a converter clutch PWM solenoid and the fluid pressure switch plate, each new in its box.
Yes. GM released Dexron VI as a service fill that is backward compatible with Dexron III applications, so it is the right fluid to use when refilling after this job.
It fixes P1811 when a weak pressure control or shift solenoid is the cause. The same code sets from worn 2nd and 3rd clutch packs or a worn AFL valve bore, so check line pressure and adapts first.
No. The solenoids are on the valve body behind the side cover, so the job is done in the car, though you will need room on the driver's side and may have to support the engine.
