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Should I Replace my Automatic Trans Valve Body?

  #1  
Old 07-22-2015, 06:46 AM
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Question Should I Replace my Automatic Trans Valve Body?

My 1994 Saturn SL automatic has over 300,000 miles and Its a fact it's been 7 years at the bare minimum since the fluid was changed in the transmision. The fluid is black and bubbly for years now as far back as when I first checked it when it was not mine. I honestly would assume its been over 10 years, 210,000 miles since a fluid change. My Saturn has the reverse issue where it slams into reverse after working the gas pedal to get it to shift. I want to replace the valve body and fluid but there's that risk of damage from replacing the fluid of an automatic transmission that's been neglected. Would it be a safe thing to replace the valve body and fluid without any harm?
 
  #2  
Old 07-22-2015, 09:29 PM
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I don't know enough about transmissions to give you an honest answer. I did that with a frigging Mitsubishi I had a couple of years ago and the damn thing never shifted right afterward. I even changed the valve body twice, but that didn't help. I think the new fluid just finished off bad clutch paks. I should have left it alone. Finally sold it for scrap price.
 
  #3  
Old 07-27-2015, 11:26 PM
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Then I will just wait until I do a complete transmission rebuild.
 
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Old 07-28-2015, 12:44 AM
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Alpha has mentioned that if you have a neglected tranny , don't change the fluid
 
  #5  
Old 07-28-2015, 01:23 AM
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I already knew that one. Was just unsure if the harm of it was with the valve body, the gears, or both. Now I know it's both, so I will just wait until I have the chance to rebuild.
 
  #6  
Old 07-28-2015, 07:11 PM
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It might not be a bad valve body, just a bad shift solenoid.

My daughters 2001 started to do the hard shifting into reverse and I swapped around 2 solenoids and it worked just fine after that.
 
  #7  
Old 07-29-2015, 10:41 PM
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The thing is I cannot do anything that would require more fluid to be added to the transmission because it runs the risk of damaging a neglected trans.
 
  #8  
Old 07-30-2015, 12:42 AM
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only drive 5 spds.

Guys that have done this (opened up valve bodies)
----how much fluid did you lose/have to replenish when done?
 
  #9  
Old 07-30-2015, 09:52 PM
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Don't worry about the tranny until you see if the engine needs to be rebuilt.
 
  #10  
Old 07-30-2015, 10:00 PM
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Already know that the trans comes after an engine overhaul.
 

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