4T65E Governor Pressure Solenoid 1997-2002, new and ready to install. Fits the 4T65E. Ships fast from the USA.
This page is titled as a governor pressure solenoid, but the 4T65E has no governor; what you actually get is a new four-piece solenoid set for the 1997-2002 4T65E: one TCC (lockup) solenoid, one EPC pressure control solenoid and two shift solenoids. It is the set people look for when an early Impala, Grand Prix, Century, Regal, LeSabre, Intrigue or Montana starts shifting harsh, sets solenoid codes, or will not lock up the converter, and they would rather replace every solenoid once than guess at one.
GM introduced the 4T65E for 1997 as the next step from the 4T60E, with the PCM running all shift and pressure decisions. The two shift solenoids switch on and off in combinations that select first through fourth gear. The EPC solenoid controls line pressure by working against the AFL and boost valves in the channel plate; Sonnax notes the AFL valve limits feed to the EPC and shift solenoids to 115 psi. The TCC solenoid applies and releases the converter clutch. On 1997-2002 units the EPC is the early large-body Holley-style solenoid; GM moved to a smaller Bosch-style EPC later, and the two do not swap. That change is the main reason this set is year-specific.
Electrical codes are the clean case: check resistance at the case connector, then at the solenoid with the pan off, to rule out the internal harness. P1811 is different. Transmission Digest explains that the PCM sets it only after shifts run longer than about 0.65 second twice in a drive cycle even with added pressure, and it can come from a worn AFL bore or loose clutch packs instead of a bad solenoid. Read our 4T65E EPC solenoid symptoms guide and the shift solenoid symptoms guide before you replace parts on a code alone.
Per the listing, this set fits 1997-2002 GM and Volvo vehicles with the 4T65E. Because the early and late EPC styles look different and do not interchange, pull the valve body cover and compare the EPC solenoid body and connector to this set, or send us your year and VIN and we will confirm. Cars from the 2002 to 2003 changeover are the ones to double-check. For later cars, see the rest of our 4T65E parts.
Drop the pan and change the filter at the same time with the 4T60E/4T65E filter and pan gasket kit; debris that killed the old solenoids is still in the sump. If the bores are worn, a 4T65E valve body is the next step.
| Fits | 4T65E 1997-2002 |
| Part type | Governor Pressure Solenoid |
| 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.
No. The 4T65E has no governor. This listing is a complete 1997-2002 solenoid set: one TCC lockup solenoid, one EPC pressure control solenoid and two shift solenoids.
Usually not. GM changed to a smaller EPC solenoid on later 4T65E units and the early and late styles do not interchange. Compare your EPC solenoid or send us your year and VIN.
Not always, but on a high-mileage unit with varnished fluid, replacing the set once avoids pulling the cover again for the next solenoid. One electrical code points to one solenoid; erratic shifting with dirty fluid often involves more than one.
Often, but not every time. P1811 is a long-shift code and can also come from a worn AFL valve bore or loose 2nd and 3rd clutch packs. If the code returns after the solenoids, look at the channel plate and clutch clearance.
Clear the codes and drive the car through every gear in normal traffic so the PCM rebuilds its shift adapts. Shifts may feel firm for the first few drive cycles.
