1986 Mercedes Benz 560sel won't upshift

1986 MERCEDES BENZ 560SEL
21,000 MILES • V8 • 2WD • AUTOMATIC
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UNCLEJIG
  • MEMBER
  • 1 POST
transmission won't upshift sometimes will operate normallywhen cold then once warm will stay in lower gears
Jun 27, 2009 at 2:18 PM
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DR LOOT
  • ✓ASE Certified Mechanic
  • 2,311 POSTS
  • ASE Certified Mechanic
You failed to mention if you check the transmission fluid when the transmission is cold the transmission fluid is sufficient when the transmission warms up the oil expands which makes it starve for oil pressure
Jul 25, 2009 at 5:36 PM
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