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1966 Truck Chevy Truck Harmonic Balancer, Big Block, -69

1966 Truck Chevy Truck Harmonic Balancer, Big Block, -69


1966-69 Big Block Harmonic Balancer
Part #:
Replacement for OEM #: 3860008
$177.99 ea.
  Alt Part #:
Available - Allow extra time for delivery
1966 Truck
See applications below for exact details.

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  • High Quality Replacement Harmonic Balancer
  • Replaces Broken, Worn, Or Damaged Factory Harmonic Balancers
  • Replaces  OE#  3860008
  • 7" OD Without Pulley, Ductile Steel & Stress Resistant Rubber Construction
  • Includes 2 Woodruff Keys, Bolts, Washers, And Installation Instructions
  • Requires Harmonic Balancer Puller  P/N 88-0110-1, Sold Separately
  • Fits 1966-1969 Big Block 427 390HP & 427 400HP Aluminum Head Chevy Trucks
  • Limited Lifetime Manufacturer's Warranty

The harmonic balance on your factory big block 1965-1969 Chevy Truck is a critical components of your engine.  It attaches directly to the front of your engine on the crankshaft. It reduces torsional vibrations created by your engine as the cylinders fire. Without the balancer, your engine would vibrate so much that it would cause rapid engine failure. Harmonic balancer failure is a direct result of heat stress, wear due to road salt, crankshaft failure, stress caused by integrated drive pulleys.

So, when you need to replace your balancer, the solution is this high quality balancer from Eckler's Chevy Truck. This one features steel construction with improved tensile strength, impact strength, and stress-resistant rubber bond. It's resistant to heat, salt, ozone, and general wear and tear. And, it safeguards your valuable engine from damaging torsional vibration...mile after mile. Best of all, each balancer is backed by a manufacturer's limited lifetime warranty and includes 2 woodruff keys, bolts, washers, and installation instructions. Always Trust Eckler's Chevy Truck for all your 1965, 1966,1967, 1968, and 1969 Chevy Truck restoration, performance, and accessory part needs.


Make / Model Series Body Notes Year
CHEVROLET TRUCK 1966, 1967, 1968, 1969
CHEVROLET TRUCK Sting Ray Convertible 1966, 1967, 1968, 1969
CHEVROLET TRUCK Sting Ray Sports Coupe 1966, 1967, 1968, 1969


Combined Cancer/Birth Defect
Prop 65 Warning

WARNING This product can expose you to chemicals including Cadmium which is known to the State of California to cause cancer on birth defects or other reproductive harm. for more information, visit