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That goes to show that one can own an auto shop and not know how something actually works.
The shifting ..... apply one clutch sending the power to one set of gears....and then another...
is taken care of by hydraulic pressure.
Inside the valve body ... which few people have actually seen.... are some small BB sized balls which are pretty much foolproof.... since they are in a vertical tube and can not fall out of the bottom of it... Gravity causes them to want to fall DOWN... pretty foolproof unless that tube gets varnish deposited over the years to where they are slowed down.. or do not fall far enough to completely seal ... these are shutdown valves.... if they allow some pressure to remain on a clutch which is supposed to be shut down... then excessive wear happens pretty quickly...and you may have two clutches engaged at the same time...
All this stuff claims to do... is dissolve the varnish.... and swell some seals.... the most important ones to most are the front and back seals of the trans... which leak when old and dry or deteriorated from heat or whatever...
My 95 Lincoln front trans seal was leaking a quart per 75 miles... I put the Trans-x in several times... it was leaking out at first of course.... and over a couple of weeks that front seal stopped leaking.... I have the car today... drive it ...and it is not leaking out the front seal... that was about ten years ago that I treated it....
about 1975 I had a 1965 Rambler... four door... and interestingly had the quarter windows on the back side of the back doors... just like a Mercedes... I bought it really cheap because it WOULD ONLY GO IN 2 GEAR....
I would not have tried Trans=x on it except a long time family friend mechanic suggested it... I am not into snake oils either....
but I followed the instructions... sitting in the driveway and moving the shifter through the gears.... allowing about a minute per gear.... and about 30 minutes later it was shifting like new... I drove the car for four years... it had those front seats which would fold down flat with the rear seats....
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