Join Date: Feb 2003
Location: Marietta, Ga.,USA
Re: Transmission Dip Stick Tube Issues
Jack the car up as high as is safe on that side and remove the dipstick assembly (a bolt is holding the tube to the bellhousing). You may get some fluid running out of the hole, unless you have a drain plug in the pan. Take the old O-ring to NAPA and buy 2 new ones. Clean ALL the residual trans fluid off and out of the hole in the trans. install both O-rings on the tube about 1/2 way up to the flange and apply a small amount of blue or black gasket sealer to the O-rings and re-install the tube assembly being careful to insert it straight with the hole. Bolt the support bracket back on and you should be good to go. Did this on 3 - TH400's and so far none have leaked a drop. Good luck with it.
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