Author Topic: noise in torque converter  (Read 4999 times)

charlie

  • Guest
noise in torque converter
« on: May 12, 2017, 06:25:01 »
I have a very big rattle in torque converter and need advise on what problem could be and how to fix it please. Cheers Charlie

Benz Dr.

  • Associate Member
  • Platinum
  • ******
  • Canada, ON, Port Lambton
  • Posts: 7220
  • Benz Dr.
Re: noise in torque converter
« Reply #1 on: May 12, 2017, 13:04:01 »
The screws that hold the flex plate to the converter are probably loose.
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

charlie

  • Guest
Re: noise in torque converter
« Reply #2 on: May 12, 2017, 23:57:58 »
How big of a job is it to fix ??

Benz Dr.

  • Associate Member
  • Platinum
  • ******
  • Canada, ON, Port Lambton
  • Posts: 7220
  • Benz Dr.
Re: noise in torque converter
« Reply #3 on: May 13, 2017, 00:45:57 »
Not hard. Take the cover off at the bottom of the bell housing and turn your engine over by hand until the screw heads appear. Check to see if they're tight and turn each screw until it is. If they're tight but the flex disc is loose, it may be that the screws are too long and they're bottoming out in their respective bores. Replace the screws with slightly shorter ones or add a washer. A loose or broken flex disc will make a lot of noise.

I've also had one where the actual disc was cracked but in that case the noise was really only there at idle and it would go away at road speed. If that's the case, you will have to remove the trans to replace the flex disc.
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

cfm65@me.com

  • Associate Member
  • Gold
  • *****
  • Cape Town, South Africa
  • Posts: 739
Re: noise in torque converter
« Reply #4 on: May 13, 2017, 01:45:00 »
Hey Doc,
Please confirm, 'remove the trans to replace the flex disc'. Is the flex disc not the rubber disc joining the trans to the prop shaft? Or is there another flex disc?
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

charlie

  • Guest
Re: noise in torque converter
« Reply #5 on: May 13, 2017, 03:08:53 »
Very good I'll go and check cheers

Benz Dr.

  • Associate Member
  • Platinum
  • ******
  • Canada, ON, Port Lambton
  • Posts: 7220
  • Benz Dr.
Re: noise in torque converter
« Reply #6 on: May 13, 2017, 07:27:53 »
This is the metal flex plate or disc between the flywheel and the torque converter.
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

cfm65@me.com

  • Associate Member
  • Gold
  • *****
  • Cape Town, South Africa
  • Posts: 739
Re: noise in torque converter
« Reply #7 on: May 13, 2017, 12:52:30 »
TKS Doc,
28 Ford Model A Pickup
29 Chevy Phaeton
67 E Type FHC
67 250SL 5 speed
83 911SC
2015 VW T5 California Pop Top

WRe

  • Full Member
  • Platinum
  • ******
  • Germany, Hessen, Seeheim-Jugenheim
  • Posts: 1454
Re: noise in torque converter
« Reply #8 on: June 22, 2017, 16:50:48 »
Hi,
to clarify this discussion see following picture. I hope it is right and clear.
(drive plate = flex plate)
...WRe

Jonny B

  • Pagoda SL Board
  • Platinum
  • ******
  • USA, CA, San Marcos
  • Posts: 4198
Re: noise in torque converter
« Reply #9 on: June 23, 2017, 02:38:50 »
As a note, this is the later style torque converter, steel. The earlier ones have the same six bolt connections, but have a finned surface and are aluminum.
Jonny B
1967 250 SL Auto, DB 568
1970 280 SL Auto, DB 904
1966 Morris Mini Minor

WRe

  • Full Member
  • Platinum
  • ******
  • Germany, Hessen, Seeheim-Jugenheim
  • Posts: 1454
Re: noise in torque converter
« Reply #10 on: July 02, 2017, 09:59:23 »
Charlie,
Please come back with your results, unfinished threads are very irritating.
...WRe