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Join Date: Feb 2006
Location: Bonham , N.E.Texas
Re: Turbo 400 modulator problem?
DO NOT use any additive to expand seals ...they never stop expanding until the seals pop out of the groove then an overhaul is necessary.Try putting brake fluid on any non-brake system rubber and see what happens.(I once put power steering fluid in the master cylinder with the same effect,even tho I sucked it out almost immediately...had to completely rebuild brakes in a months time)Lubegard is the only thing I would try ($15 from a transmission shop or I can send it to you).It is a friction modifier and might loosen up the modulator/valve body at cold start.Put in a new shift seal , they shrink up over time or non-use anyway.If all else fails ,pull the modulator first to see if it is sticky,then the valve body and clean it up and free the valves