GM 4L60 4-Speed Overdrive Automatic · GM/Chevrolet/GMC/Cadillac/Buick · Expert rebuild service since 1987. Lifetime warranty. Free diagnostic.
1990–1993 Chevrolet Camaro, Corvette; 1990–1993 GMC/Chevrolet trucks; identical to 700R4, renamed by GM in 1990
| Configuration | 4-speed automatic with overdrive — same as 700R4 |
|---|---|
| Gear Ratios | 1st 3.06:1 · 2nd 1.63:1 · 3rd 1.00:1 · 4th 0.70:1 · Rev 2.29:1 |
| Fluid Type | Dexron III ATF |
| Fluid Capacity | 11.0 qts total, 5.5 qts service refill |
Same TV cable failure mode as the 700R4. The 4L60 (pre-electronic) still uses mechanical TV control.
Symptoms: Soft shifts; clutch burn; slip under load
Same 4th-gear OD clutch weakness as 700R4.
Symptoms: No OD; slip in 4th gear
High-mileage 4L60 units develop vane pump wear causing low line pressure.
Symptoms: Slip across multiple gears; low pressure confirmed on test
Same procedure as 700R4. TV cable calibrated. OD clutch upgraded. Pump inspected. All clutch packs replaced. Shift kit installed. Full soft parts.
Dexron III every 30,000 miles. TV cable adjustment critical — same as 700R4.
Yes — GM renamed the 700R4 to 4L60 in 1990. Completely identical mechanical unit.
The 4L60E (introduced 1993) added electronic shift solenoids, replacing the mechanical TV cable. The 4L60E requires a computer to operate; the 4L60 is fully mechanical.
Many internal parts interchange, but the valve bodies are different — the 4L60E valve body has solenoid bores; the 4L60 has TV passages.
Dexron III ATF.
$1,400–2,000. 2-day turnaround.
Free diagnostic, written estimate, lifetime warranty. Chicago's 4L60 rebuild specialists since 1987.
