The TA water pump has been problematic in overhauling due to its design so we have changed the seals and bearing arrangements which we believe is more efficient and this shaft has been modified to suit the new set up. The photo below shows the complex arrangement of seals and washers in an original pump next to our new arrangement.
We do have some original used water pump shafts if desperate, alternatively we can offer to refurbish your water pump (see B023XT)