All, Does the gearbox on a TR4A, with A-type OD, have an oil filter? If so, where is it located and from where does one purchase replacements? I am thinking through the work I am planning on doing, and came across this thought issue. Cheers, Guy D. Huggins 1965 Triumph TR4A CTC 63569LO Online project diary at http://www.genfiniti.com/triumph