Nissan AD Van: Rear leaf spring rust and shackle wear — commercial use

The Y11 and Y12 AD Van uses a rear leaf spring suspension designed for light commercial payload. In NZ conditions, the leaf spring packs corrode between the leaves (inter-leaf corrosion), causing the spring to lose its designed arc and sag under load. The rear shackle pins and bushes also wear, producing rattling and clunking over rough surfaces. Commercial vehicles used for regular delivery work are especially prone due to repeated heavy loading and exposure to road spray. Corroded and sagging springs also cause a low ride height that can result in WoF failure.

• Rear of vehicle rides noticeably low, especially when lightly loaded
• Clunking or rattling from the rear when driving over rough surfaces or speed humps
• Vehicle wallows or bounces excessively over bumps compared to normal
• Visible rust scale on the leaf spring pack surfaces when inspected underneath

1. 1

   Inspect underneath at the rear — check each leaf for corrosion, cracking, or deformation.

2. 2

   Verify the spring pack is not sagging below its designed profile by checking rear ride height.

3. 3

   Rock the rear of the vehicle and listen for clunking from the shackle pins.

4. 4

   Check shackle bushes for splitting or deterioration.

5. 5

   Inspect U-bolt nuts for corrosion and confirm they are torqued correctly.

Parts involved: Rear leaf spring.

$350 to $900 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

• “What payloads was this vehicle regularly carrying — was it often loaded to capacity?”
• “Has the rear suspension been inspected or had any components replaced?”
• “Does the rear clunk or make noise over rough roads?”

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.