« previous next »
Pages: [1]

Author Topic: Funny "topcover" on my transmission box  (Read 2390 times)

BartSt

  • Inactive
  • Senior
  • ***
  • Belgium, Flanders, Antwerp
  • Posts: 160
Funny "topcover" on my transmission box
« on: July 10, 2021, 13:58:15 »
All,

"It fits but it doesn't ..."

I just spend the morning cleaning my transmission and I noticed that the top doesn't seem original ...

Pls have a look at the photo.

Who can explain what is going on?

Thanks (again)

Bart


Logged

BartSt

  • Inactive
  • Senior
  • ***
  • Belgium, Flanders, Antwerp
  • Posts: 160
Re: Funny "topcover" on my transmission box
« Reply #1 on: July 10, 2021, 20:29:41 »
Nobody ... ?

That would be the first time ...
Logged

Leester

  • Full Member
  • Silver
  • ****
  • USA, VA, Lorton
  • Posts: 441
Re: Funny "topcover" on my transmission box
« Reply #2 on: July 11, 2021, 00:10:45 »
Looks like mine.  Bear in mind that there are two different top covers, one for the top loader (yours and mine) and a different one for the side shifter that came with cars that had column shift. Since I don't have a side shifter I don't know if the profile of the top cover is different. I don't think you have a problem, at least with the top cover appearing to not fit.
Logged
Lee Backus
1963 220SE Cabriolet
1970 280SL (reassembling - hopefully soon)
1978 450SL (disassembled for paint)
1985 500SEC

Benz Dr.

  • Associate Member
  • Platinum
  • ******
  • Canada, ON, Port Lambton
  • Posts: 7220
  • Benz Dr.
Re: Funny "topcover" on my transmission box
« Reply #3 on: July 11, 2021, 05:04:53 »
It looks like any other top loader transmission that I've seen. Why do you think something's wrong?
Logged
1966 230SL 5 speed, LSD, header pipes, 300SE distributor, ported, polished and balanced, AKA  ''The Red Rocket ''
Dan Caron's SL Barn

1970  3.5 Coupe
1961  190SL
1985   300CD  Turbo Coupe
1981  300SD
2013  GMC  Sierra
1965  230SL
1967 250SL
1970 280SL
1988 560SEC

BartSt

  • Inactive
  • Senior
  • ***
  • Belgium, Flanders, Antwerp
  • Posts: 160
Re: Funny "topcover" on my transmission box
« Reply #4 on: July 11, 2021, 06:42:36 »
Because the hole on the corner doesn't make sense.

Why not cover the entire edge?

Bart
Logged

WRe

  • Full Member
  • Platinum
  • ******
  • Germany, Hessen, Seeheim-Jugenheim
  • Posts: 1454
Re: Funny "topcover" on my transmission box
« Reply #5 on: July 11, 2021, 08:04:58 »
Hi,
at the same time it looks strange but it should be okay.
...WRe
Logged

ejboyd5

  • Associate Member
  • Gold
  • *****
  • Southold, NY
  • Posts: 510
Re: Funny "topcover" on my transmission box
« Reply #6 on: July 11, 2021, 18:17:02 »
Note same "mismatch" on 300 SL transmission. Case was designed to accept several different covers depending upon application.
Logged

BartSt

  • Inactive
  • Senior
  • ***
  • Belgium, Flanders, Antwerp
  • Posts: 160
Re: Funny "topcover" on my transmission box
« Reply #7 on: July 11, 2021, 19:08:24 »
Ok, thanks. Learned again something interesting this week.
Those funny Germans ...
Logged

Shvegel

  • Inactive
  • Platinum
  • ******
  • USA, OH, Cleveland Heights
  • Posts: 2978
Re: Funny "topcover" on my transmission box
« Reply #8 on: July 14, 2021, 10:36:06 »
I think what you are looking at is a dowel pin hole. In order to machine the raw casting correctly that would have been where the case was located on the fixture for final machining.

Raw casting

Face the top of the case and drill dowel holes.

Flip case and install on fixture.

Face front and back and bore bearing bosses. 

Once the top is milled and the dowel holes are drilled every other operation keys off that height and location.
« Last Edit: July 21, 2021, 19:38:15 by Shvegel »
Logged
Pages: [1]
« previous next »