4T60E Solenoid Kit 1991, new and ready to install. Fits the 4T60E. Ships fast from the USA.
The 1991 model year was one of the first for GM's electronically shifted 4T60E, and three decades later its solenoids are a common reason one of these front-wheel-drive cars stays in one gear, will not lock the converter at highway speed, or flashes the check engine light with a transmission code. This 1991 4T60E solenoid kit is new; the listing photo shows three solenoids, each still in its OEM-branded box, rather than loose parts of unknown origin.
On the hydraulic 4T60 a governor and throttle valve decided the shift points. The 4T60E handed that job to the engine computer, which energizes the shift solenoids in combinations to select each gear and switches a converter clutch solenoid to lock the converter once the car is at cruise. The solenoid only opens or closes an oil passage; the shift valve it controls does the heavy work. That is why a weak coil or a leaking seat produces a missing gear rather than a noise, and why the computer often still believes it is in the gear it commanded.
Retrieve codes, then check power and ground to each solenoid at the case connector before condemning the part. A solenoid that is open, shorted or sticks with power applied is bad; a solenoid that clicks and reads normal points the search toward the valve body. Sonnax ties the same falls-out-of-lockup-when-hot complaint to wear in the TCC regulator valve on 4T60E units, so a good coil is not the end of the diagnosis. Our common problems guide for the successor 4T65E covers the shared failures, and the speed sensor guide helps rule out bad input data to the computer.
This kit is listed for the 1991 4T60E only. GM made running changes during 4T60E production, and later units added parts this early set does not include, so match the solenoids and connectors on your valve body to the listing photo, or send us your year and VIN before ordering. For later 4T60E cars, see the 4T60E solenoid kit with the pressure control solenoid, and browse the 4T60E and 4T65E parts collection for the rest of this family.
Plan on servicing the fluid and filter at the same time, because a 1991 unit with original solenoids often has varnish in the valve body. Fit new O-rings on each solenoid, check that the internal harness insulation has not gone hard, and seat each connector until it locks. Fill with Dexron VI, which GM approved for back-service in the Dexron-II and III units of this era. If the clutches are already slipping, the solenoids alone will not save it; a 1991-1999 4T60E overhaul kit supplies the seals and gaskets for a rebuild.
| Fits | 4T60E 1991 |
| 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.
The listing photo shows three solenoids, each in its own OEM-branded box.
No. Later 4T60E units use a different set that includes a pressure control solenoid, which we list separately. Match your originals or send your VIN.
It can be. Check for a stored code and test the converter clutch solenoid's power, ground and resistance. If it tests good, a worn TCC regulator valve bore is the other common cause.
Dexron VI. GM approved it for back-service in older Dexron-II and Dexron-III transmissions.
Yes. A transmission this age usually has varnish and debris, and new solenoids should not be fed oil through an old filter.
