suspension

Torsion Bar Adjustment

for 1966 Chevrolet Corvette 327ci V8 · RWD

Difficulty

Easy

Time

36 min

Tools

Steps

✓Fact-checked. Built from OLP's spec database, then independently fact-checked line by line with every correction applied. Master-tech sign-off by Chris Hackleman is queued. Cross-check torque values against the factory manual, and stop if anything looks unsafe. How our data is made.

Adjusts the front suspension torsion bars to restore proper ride height and correct vehicle stance on the 1966 Corvette independent front suspension.

Warnings

⚠️Never work under a vehicle supported only by a jack. Always use jack stands rated for the vehicle weight.

⚠Torsion bars are under significant spring tension. Do not attempt to remove torsion bar anchor arms without proper procedures as sudden release can cause injury.

ℹ️Ride height adjustments affect wheel alignment. Have alignment checked after making torsion bar adjustments.

Tools required

Floor jackEssential

Jack stands (2)Essential

Wheel chocksEssential

Tape measure or ride height gaugeEssential

1/2" ratchetEssential

1/2" drive socket setEssential

Torsion bar adjustment tool (or large flat blade screwdriver)Essential

Penetrating oil

Wire brush

Flashlight or work light

Pry bar

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Preparation

Park vehicle on level, flat surface and set parking brake
Place wheel chocks behind rear wheels
Measure and record current ride height from ground to bottom of front frame rail at a point 6 inches behind the front wheel centerline on both sides
Note that factory specification is approximately 3.5 to 4 inches from ground to frame rail bottom
If torsion bar adjusters are heavily corroded, spray with penetrating oil and allow to soak for 15-20 minutes

Procedure

1
Raise and support the vehicle
Use floor jack to lift front of vehicle at the front crossmember. Raise until front wheels are just off the ground. Place jack stands under the frame rails behind the front suspension crossmember. Lower vehicle onto jack stands and verify stability before proceeding.
2
Locate torsion bar adjusters
Position yourself under the front of the vehicle. This step does not apply: the 1966 Corvette front suspension uses coil springs, not torsion bars, and has no torsion bar anchor arms or adjustment bolts. Front ride height is determined by the coil springs and is not field-adjustable.
3
Clean adjustment hardware
Use wire brush to clean the adjustment bolt, lock nut, and surrounding area on both sides. Remove any dirt, rust, or debris that could interfere with accurate adjustment. This is critical for precise height setting.
4
Loosen lock nuts
Using the appropriate socket, loosen the lock nut on each torsion bar adjuster bolt. Do not remove the lock nut completely, just loosen it enough to allow the adjustment bolt to turn freely. The lock nut is located at the rear of the adjustment bolt.
5
Make initial adjustment
This step does not apply: there is no torsion bar adjustment bolt on the 1966 Corvette. Ride height is governed by the front coil springs and cannot be raised or lowered by turning an adjuster.
6
Settle suspension
After making initial adjustment, carefully raise the vehicle slightly off the jack stands, remove stands, and lower vehicle completely to the ground. Bounce the front end 3-4 times by pushing down firmly on the front bumper and releasing to settle the suspension into its adjusted position.
7
Measure ride height
Measure ride height at the same point used during preparation (bottom of frame rail 6 inches behind front wheel centerline) on both sides. Compare to the factory ride-height specification listed in the 1966 Corvette (C2) chassis service manual using the manual's specified measurement points, and compare sides to each other for balance. Difference between left and right should not exceed 0.25 inch.
8
Make fine adjustments if needed
If ride height is not within specification or sides are uneven, raise and support vehicle again. Make small adjustments (1/4 to 1/2 turn at a time) to the adjustment bolts as needed. This step does not apply: there is no adjuster bolt on the 1966 Corvette, so no per-turn ride-height change figure exists. Repeat steps 6 and 7 until correct height is achieved.
9
Tighten lock nuts
With vehicle raised and supported on jack stands and correct ride height verified, hold the adjustment bolt stationary while tightening the lock nut firmly against the anchor arm. Tighten lock nuts on both sides to secure the adjustment. Ensure the adjustment bolt does not turn while tightening the lock nut.
10
Final verification
Lower vehicle to ground and bounce front end again to settle suspension. Take final ride height measurements on both sides and verify they match your target height and are within 0.25 inch of each other side-to-side.

Reassembly

No disassembly was required for this adjustment procedure
Ensure both lock nuts are tightened securely before driving vehicle

Verification

Measure final ride height at both front frame rails - should be 3.5 to 4 inches from ground to bottom of frame rail
Verify side-to-side difference does not exceed 0.25 inch
Confirm adjustment bolt lock nuts are tight and adjustment bolts cannot turn
Test drive vehicle and verify normal handling with no unusual noises from front suspension
Schedule wheel alignment check within one week as torsion bar adjustment affects camber and caster angles

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