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Thanks for the replies, I’ve been overseas and only just returned. At this stage, a full inspection of the gearbox by a well known local auto gearbox company, went over all vacuum lines, vacuum valve and all these items are ok, he removed the bottom off the gear box and then took out the valve...

I was reading a few threads done a few years ago on 450 SEL 6.9 transmission valve bodies, and the question back then was does a standard 450 sel valve body work on a 6.9? As last reported, I have transmission issues & my mechanic and I are going through the process of elimination. If anyone in...

I was reading a few threads done a few years ago on 450 SEL 6.9 transmission valve bodies, and the question back then was does a standard 450 sel valve body work on a 6.9? As last reported, I have transmission issues & my mechanic and I are going through the process of elimination. If anyone in...

I should have said Many thanks Sean my apology

Many thanks Patrick for the reply, apology for the delay in my response I've been away. transmission sticks in first gear, gets into second then drops back to first driving slowly, will get into third and every now and then drops back. I have the vehicle booked into a local auto transmission...

Many thanks Patrick

Evening All, I'm having transmission issues etc, and our local Gearbox Mechanic outlined to me that the diaphragm could be split, it's not holding any vacuum. Questions 1 - Any idea where one could purchase one from? 2 - Also, would anyone have the original part No Thanks Starman