Typically the steering system fluid/flush + QB catalyst is good for 30 to 40k miles. However, depending on moisture, use, temperatures etc, I have seen where a system may need to be re-flushed and re-treated. Sometimes due to the loads and sometimes again too because of the residual materials that are left from the previous fluid.
Give me a call and we can discuss this.
Regards,
Brian
BND Automotive LLC:driving:
440-821-9040
www.bndautomotive.com