10L90 Solenoid Kit, new other (see details) and ready to install. Fits the 10L90. Ships fast from the USA.
If you drive a GM car, truck or SUV with the 10L90, the heavier-torque version of GM's ten-speed used with engines like the 6.2L V8 and the supercharged Camaro ZL1, and it has started to slam a shift, slip in one gear or throw a control solenoid code, this kit covers the six solenoids that run its clutches. It is a new set of six valve body solenoids cross-referenced to part numbers 24046408, HL3P-7J136-AA and HL3P-7J136-AD. The same solenoid design is shared across the 10L60, 10L80 and 10L90, so the cross-reference is not unique to the 10L90.
Transmission Digest describes the GM and Ford ten-speeds as having eight pressure-regulating solenoids. Numbers 1 through 6 are normally low linear solenoids, one per clutch, and these are the six in this kit. Number 7 sets line pressure and number 8 controls the converter clutch. ATRA's GEARS magazine explains that these solenoids sit directly in the casting and do not flow oil themselves. A pin on the solenoid pushes a clutch control valve, and the valve does the metering. That means the fit of the solenoid in its bore is as important as the coil, and the 10L90's extra torque puts more load on each clutch apply that solenoid controls.
On these transmissions many solenoid complaints come from the casting around the solenoid. Sonnax's layout of the later GM 10L60/80/90 valve body lists collapsed solenoid retainers that let a solenoid sit crooked in its bore and wear the casting at the valve opening. On the car side, NHTSA campaign 25V-148 covers 10-speed Camaro and Cadillac CT4, CT5 and CT6 models, where GM found valve body wear could cause a pressure drop and unexpected valve movement. Check the VIN for open recalls first. Then read our 10L80 and 10L90 valve body recall guide and the pressure control solenoid guide, which explains why P0747 on later units often points to a worn feed limit valve instead of a solenoid.
This set is listed for 10L60, 10L80 and 10L90 valve bodies in Chevrolet, GMC, Buick and Cadillac applications. It does not fit the Allison 10L1000 used in heavy-duty pickups. GM revised the 10-speed valve body around late 2019, and fitment can vary by year, engine and valve body version. Before ordering, read the part number and band number printed on one of your original solenoids and note the connector color, or send us your year and VIN. Browse matching parts on our GM 10-speed parts page.
If the module itself is being reflashed on the bench, the T87A TCM bench harness lets you power and program it off the vehicle.
| Fits | 10L90 |
| Part type | Solenoid Kit |
| Condition | New Other (See Details) |
| 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 six clutch solenoids are shared across the 10L60, 10L80 and 10L90, so the cross-reference numbers are the same. Always match the part and band number on your original solenoids.
No. It contains the six clutch control solenoids only. Solenoid 7 for line pressure and solenoid 8 for the converter clutch are separate parts.
It is listed for 10L90 valve bodies, including Camaro applications. Check for the open recall first, then send us your VIN so we can confirm the valve body version.
Yes. GM characterizes each solenoid, and the control module must be loaded with the solenoid data after replacement, followed by a shift relearn.
No. The kit is not listed for the Allison 10L1000 heavy-duty ten-speed.
DEXRON ULV. Do not use older DEXRON VI or universal fluids in these transmissions.
