Building a new seatbox
A Land Rover Series or Defender seatbox is of fairly basic construction: aluminium panels spot-welded together from factory to form the base to which your seats bolt on. On this model the battery sits in a steel box, also spot-welded and fixed to the aluminium frame. Long wheelbase models, with their fuel tank at the back, will often have an extra steel box fitted under the driver’s seat.
If you’ve been following this series, which has so far concentrated on the rear tub, you’ll be familiar with the issue here: steel and aluminium are dissimilar metals, and the steel wins the battle over aluminium, resulting in galvanic corrosion and turning it to dust. The seat box suffers in the same way.
Fortunately, it doesn’t matter how far gone your seatbox is, because
