Boiler_81 Posted July 6, 2003 Share Posted July 6, 2003 I am having a problem with upshifts with my Turbo 400 in a 1970 W30. Background:1.) The car was in storage for 5 years, I do not recall the issue prior to storage2.) Car was removed from storage and test driven, under full throttle it seemed as if the transmission was shifting late. The tach does not work so I don?t know the shift RPM. However, acceleration was dropping off when it shifted.3.) I checked the fluid level and found it to be a quart low and topped it off. In the next test drive the transmission would not shift at all under full throttle conditions. It did shift correctly under partial throttle.4.) After the car sat for an hour I drove it again and got the late shift condition again.Any Ideas?Thanks,Scott Link to comment Share on other sites More sharing options...
rocketraider Posted July 7, 2003 Share Posted July 7, 2003 Change the fluid and filter. You may even want to take it to a shop that has a Bilstein flushing machine and have the whole shebang flushed. I think what has happened is that during storage, all the fluid drained back to the pan and seeped out around the pan gasket (explains the quart low), and the remaining fluid film varnished on the transmission internals. The governor is probably sticking a little causing the late or no shifts, or the downshift solenoid or switch could have stuck too and caused the no upshift.The salvation here is that transmission fluid is also a fairly decent solvent and will probably dissolve the goo eventually. It may take more than one cycle of flushing and driving to straighten it out. At worst you're looking at a transmission rebuild, and most any shop can do a Turbo 400. Link to comment Share on other sites More sharing options...
Oldsmaniac Posted July 7, 2003 Share Posted July 7, 2003 Check for a leaking or disconnected vacuum line that goes down to the modulator on the trans on the passenger side. Link to comment Share on other sites More sharing options...
Boiler_81 Posted July 7, 2003 Author Share Posted July 7, 2003 Thanks Glenn! I will give your suggestion a try.Scott Link to comment Share on other sites More sharing options...
Boiler_81 Posted July 7, 2003 Author Share Posted July 7, 2003 Thanks, Oldsmaniac! I had done a quick look at the modulator line and saw nothing. I'll check it closer Monday.Thanks,Scott Link to comment Share on other sites More sharing options...
Boiler_81 Posted July 7, 2003 Author Share Posted July 7, 2003 Glenn:I think your theory may have been correct. I drove the car again to day and the upshifts under full throttle worked correctly.Thanks,Scott Link to comment Share on other sites More sharing options...
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