Author Topic: Very Hot Automatic Shift Plate  (Read 3111 times)

tarheel

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Very Hot Automatic Shift Plate
« on: July 21, 2017, 21:26:47 »
Greetings Experts:

I have a 1969 280 SL automatic.

When I drive for approximately 15 minutes, the metal shift plate (chrome piece with gear indications) gets so hot one could fry and egg on it.

Seems to become oddly and extremely hot, and it is hard for me to believe this is normal heat transfer from the transmission.  Gets hot regardless of how calmly or vigorously I drive.

Any thoughts on the cause and solution?

James
« Last Edit: July 27, 2017, 19:32:01 by tarheel »

PIP1947

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Re: Very Hot Automatic Shift Plate
« Reply #1 on: August 05, 2017, 00:07:23 »
Hi Tarheel
I have exactly the same occurrence in my '68 280SL auto, so I am looking forward to hearing any forthcoming explanations. My shift plate becomes extremely hot during hot weather running and is always very warm to hot, regardless of outside temperatures.
Cheers
Pip1947

cfm65@me.com

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Re: Very Hot Automatic Shift Plate
« Reply #2 on: August 13, 2017, 06:04:21 »
Hi Guys,
The later models have a light inside the shift plate in order to illuminate the shift gate.
It could be the globe touching the metal shift plate?
Regards
Chris
28 Ford Model A Pickup
29 Chevy Phaeton
67 E Type FHC
67 250SL 5 speed
83 911SC
2015 VW T5 California Pop Top

Pawel66

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Re: Very Hot Automatic Shift Plate
« Reply #3 on: August 13, 2017, 13:40:45 »
I had a same thought as Chris. Particularly if you have to drive with some lights on that may be the case.

In Mercedes, in later models, there are 1.2W bulbs to illuminate dash and switches. They are often replaced with a very similar ones, but 2W. I saw switches melted after this kind of replacement. I am saying this just to illustrate that these small bulbs produce a lot of heat...
Pawel

280SL 1970 automatic 180G Silver
W128 220SE
W121 190SL
G-class

badali

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Re: Very Hot Automatic Shift Plate
« Reply #4 on: August 13, 2017, 14:02:37 »
There is a thick foam pad inside the housing.  Maybe yours is missing causing the heat to get to the plate.
Brad

1961 220 Sb
1966 230 SL (Sold)
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66andBlue

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Re: Very Hot Automatic Shift Plate
« Reply #5 on: August 13, 2017, 16:56:17 »
Perhaps you are missing the long heat shield above the exhaust pipes?

Alfred
1964 230SL manual 4-speed 568H signal red
1966 230SL automatic 334G light blue (sold)
1968 280SL automatic (now 904G midnight blue)