GM 10L90 10-Speed Heavy-Duty Automatic · GM/Chevrolet/GMC/Cadillac/Buick · Expert rebuild service since 1987. Lifetime warranty. Free diagnostic.
2017–present Chevrolet Silverado 2500/3500 HD; 2017–present GMC Sierra 2500/3500 HD; Cadillac Escalade ESV (6.2L high output); heaviest-duty GM 10-speed application
| Configuration | 10-speed automatic — heavy-duty full-size truck 10-speed |
|---|---|
| Gear Ratios | 1st 4.70:1 · 2nd 2.99:1 · 3rd 2.15:1 · 4th 1.77:1 · 5th 1.52:1 · 6th 1.28:1 · 7th 1.00:1 · 8th 0.85:1 · 9th 0.69:1 · 10th 0.64:1 · Rev 4.87:1 |
| Fluid Type | Dexron HP ATF |
| Fluid Capacity | 11.5 qts total, 6.5 qts service refill |
TCC shudder under maximum towing loads — more severe than 10L80 due to higher torque inputs.
Symptoms: Shudder while towing at highway speed; TCC cycling; temp warning
High-torque HD truck applications accelerate valve body solenoid wear.
Symptoms: Erratic shifts under load; P-codes
Sustained 10th-gear towing at altitude or high temperatures wears the OD clutch pack.
Symptoms: Slip in 9th or 10th gear under heavy load
Full disassembly. Solenoid body replaced. TCC replaced with upgraded unit. OD clutch pack replaced. All clutch packs and soft parts replaced. Valve body rebuilt.
Dexron HP every 30,000 miles for HD towing applications. Auxiliary cooler and trans temperature monitoring strongly recommended.
Larger clutch packs, stronger planetary gears, higher torque capacity (approximately 780 lb-ft vs 540 lb-ft for 10L80). Built for HD truck towing duty.
TCC shudder under load is the most common complaint. Fresh Dexron HP helps if fluid-related; persistent shudder under load indicates TCC wear requiring converter service.
3–4 days.
$2,800–3,800.
Dexron HP ATF.
Free diagnostic, written estimate, lifetime warranty. Chicago's 10L90 rebuild specialists since 1987.
