1986 Mercedes Benz 560sel won't upshift

UNCLEJIG

MEMBER
1986 MERCEDES BENZ 560SEL
V8
2WD
AUTOMATIC
21,000 MILES

Transmission won't upshift sometimes will operate normallywhen cold then once warm will stay in lower gears

Saturday, June 27th, 2009 AT 2:18 PM

1 Reply

DR LOOT

MECHANIC
2,311 POSTS

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

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