Pagoda SL Group

W113 Pagoda SL Group => Drive train, fuel, suspension, steering & brakes => Topic started by: tarheel on July 21, 2017, 21:26:47

Title: Very Hot Automatic Shift Plate
Post by: tarheel 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
Title: Re: Very Hot Automatic Shift Plate
Post by: PIP1947 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
Title: Re: Very Hot Automatic Shift Plate
Post by: cfm65@me.com 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
Title: Re: Very Hot Automatic Shift Plate
Post by: Pawel66 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...
Title: Re: Very Hot Automatic Shift Plate
Post by: badali 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.
Title: Re: Very Hot Automatic Shift Plate
Post by: 66andBlue on August 13, 2017, 16:56:17
Perhaps you are missing the long heat shield above the exhaust pipes?

(https://www.sl113.org/forums/index.php?action=dlattach;topic=12145.0;attach=5519;image)