When engine is hot transmission will not engage reverse

Tiny
RICHARD CAINES
  • MEMBER
  • 1989 MERCEDES BENZ 300SE
  • 3.0L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 40,000 MILES
Does not engage reverse when engine is hot.
Wednesday, October 10th, 2018 AT 12:08 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,536 POSTS
It sounds like the transmission is going bad but I would try to replace the engine coolant temperature sensor which could be shorting out when warm causing the issue.

Here is a guide to walk you through the steps and diagrams below to show you how on your car:

https://www.2carpros.com/articles/coolant-temperature-sensor-cts-replacement

Check out the diagrams (below). Please let us know what you find.

Cheers, Ken
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Thursday, October 11th, 2018 AT 3:49 PM

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