It is possible to replace the leaking seal. For the worm wheel steering box, there is only 1 seal at the lower steering arm that usually leaks.
It is not easy to replace unless you have the necessary tools, main one being a universal puller to get the arm off.
Remember to check for wear on the seal seats on shaft.
Nothing special to note while removing or installing the gear box except be careful with the pipes, don't get them cross threaded when installiing.
Tuesday, June 24th, 2008 AT 12:01 PM