6L90 Tcc Solenoid, new and ready to install. Fits the 6L90. Ships fast from the USA.
Most people who land here searched for a 6L90 TCC solenoid because their Silverado or Sierra HD, Express or Savana surges or cycles the converter clutch at low speed, or keeps setting a shift solenoid code that a new solenoid did not cure. On the 6L90 the TCC solenoid is part of the control solenoid assembly, so the parts that actually wear in that circuit are the valves it controls. This is the TransGo 6L8-CS-TCC kit: a hardened steel TCC regulator valve with its calibration spring, plus two hardened steel clutch select valves and two springs. It drops into the original valve body bores and fits the 6L45, 6L50, 6L80 and 6L90.
The module pulses the TCC solenoid to control how much the lockup clutch slips. That solenoid signal does not apply the clutch directly; it strokes the TCC regulator valve, which meters apply pressure to the converter. TransGo's position is that the factory valve and spring do not give fine enough control at lower road speeds, which shows up as lockup cycling or a low-speed surge. Their redesigned valve has longer lands that ride on unworn sections of the bore, and a matched spring for finer slip control.
The two clutch select valves sit downstream of the shift solenoids and route oil to the clutch circuits. When one sticks or drags, the module sees the wrong result and blames the solenoid or the pressure switch, because it cannot tell the three apart. That is how a good solenoid assembly gets replaced and the code comes right back.
Read the codes and line pressure first. A clutch select valve problem typically shows normal line pressure with a performance code, not a circuit code; an electrical circuit code points back at the module. Our 6L90 shift solenoid testing guide explains how P0751 is set and why the pressure switches muddy the picture. For a 2016-2019 Express, Savana, Silverado or Sierra with the 6.0L and a steady 30-40 mph surge, also check GM bulletin 18-NA-253 before opening the transmission, and review the 6L90 common problems guide for converter damage that a valve kit will not fix.
The kit fits all 6L90 units, along with the 6L45, 6L50 and 6L80, for the 2007-2020 heavy-duty Silverado and Sierra, Express and Savana vans, and the performance cars that used the 6L90. TransGo supplies the clutch select valve springs for units with the updated factory separator plate, so look at your plate before you install and call us with your year and VIN if you are unsure which you have. See every 6L90 part we stock.
If the valve body bores are too far gone to reuse, a complete remanufactured 6L90E valve body is the cleaner repair. If you are already in the case for a rebuild, the 6L90 master rebuild kit covers the soft parts.
| Fits | 6L90 |
| Part type | Tcc Solenoid |
| Condition | New |
| Brand | TransGo |
| Reference | P0751 |
| Ships | From the USA |
| Warranty | 1-year |
No. On the 6L90 the TCC solenoid is built into the control solenoid assembly and is not sold separately. This is the TransGo 6L8-CS-TCC valve kit: a TCC regulator valve and spring plus two clutch select valves and springs, the parts in that circuit that wear and stick.
TransGo designed it to correct false P0751 and other solenoid performance codes caused by sticking or dragging clutch select valves. If the code is an electrical circuit code, the problem is in the solenoid assembly or wiring instead.
Yes. The kit fits the 6L45, 6L50, 6L80 and 6L90.
The kit installs in the valve body, and the listing calls for transmission removal. Most shops install it during a rebuild or valve body overhaul.
Refill with Dexron VI, clear adaptives and run the adaptive learn. If you had converter shudder, inspect the converter and flush the cooler, since a worn converter clutch will still shudder with new valves.
