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"Transmission to throttle link" bush missing

  • Racediagnostics
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29 May 2020 15:14 - 29 May 2020 15:15 #247875 by Racediagnostics 450 SL 107.044 1979
"Transmission to throttle link" bush missing was created by Racediagnostics
I just had a look for the part number of the bush which seems to have fallen out of my car, but can't find it.

Does anyone know what the part number is?

In the picture below you can see the "ball" and the hole which the bush must fit into. I found it was simply sitting in the hole. Surprisingly the transmission is still shifting well and I only spotted the problem when I was gluing a part of the heat shield back onto the bulkhead.

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Cheers
Jim

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1979 450SL - 2002 XK8 4.2
Last edit: 29 May 2020 15:15 by Racediagnostics.

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  • Marcel
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29 May 2020 15:30 #247877 by Marcel 300 SL 107.041 1986 Standard (Europa)
Hi Jim,

I have searched for a 450 SL Year 79 (FIN .. 055 883) and this might be the right parts, see picture Part 125


Gruß Marcel
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29 May 2020 15:38 #247878 by Racediagnostics 450 SL 107.044 1979
Replied by Racediagnostics on topic "Transmission to throttle link" bush missing
Hi Marcel, many thanks for the very quick response!

Cheers
Jim

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29 May 2020 16:03 #247879 by Racediagnostics 450 SL 107.044 1979
Replied by Racediagnostics on topic "Transmission to throttle link" bush missing
I have just been reading on Benzworld that this bush was the subject of a Recall in the USA.

www.benzworld.org/threads/throttle-linka...-replacemet.1360359/

Does anyone know if it is applicable in the Europe?

Cheers
Jim

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29 May 2020 16:05 #247880 by Hannesmann 350 SLC 107.023 1978
Replied by Hannesmann on topic "Transmission to throttle link" bush missing
And give some oil to it all ... looks very dry to me :)
Gruss
Achim

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29 May 2020 16:39 - 29 May 2020 16:42 #247883 by Marcel 300 SL 107.041 1986 Standard (Europa)
Hi Jim,

Part 125 in the latest version is A 117 070 02 84 and should be available for 7,52 € at the MB dealer

Gruß Marcel
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Last edit: 29 May 2020 16:42 by Marcel.
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29 May 2020 16:56 #247886 by Racediagnostics 450 SL 107.044 1979
Replied by Racediagnostics on topic "Transmission to throttle link" bush missing
Thanks, I just placed an order fpor the part, a cir-clip is also needed but MB will only sell me 10 at a time for 10Euro. I am sure I will find one that fits in my garage,

sternzeit-107sl.de/de/forum/forum-107/8635

Cheers
Jim

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31 May 2020 17:34 #248110 by Racediagnostics 450 SL 107.044 1979
Replied by Racediagnostics on topic "Transmission to throttle link" bush missing
Can anyone help direct me to any documentation that describes how to set up the correct position for the control rod?

Cheers
Jim

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31 May 2020 17:47 #248113 by micha77 560 SL 107.048 1988 Americas (USA/CAN)
Replied by micha77 on topic "Transmission to throttle link" bush missing
Hi Jim,

here you are: click

Gruß
Michael
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04 Jun 2020 21:39 #248631 by Racediagnostics 450 SL 107.044 1979
Replied by Racediagnostics on topic "Transmission to throttle link" bush missing
The new ball joints arrived today, I have found that they will fit in place with a 7mm "E" clip.

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Cheers
Jim

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05 Jun 2020 14:59 - 05 Jun 2020 15:15 #248701 by Racediagnostics 450 SL 107.044 1979
Replied by Racediagnostics on topic "Transmission to throttle link" bush missing
I fitted the new ball joint today and have a question to ask.

I had planned to fit the ball joint and E clip an place and placed a towel there to catch any dropped parts, but as they looked like they needed to be cleaned I decided to remove the parts first.

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I first removed this link.

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Then these E clips.

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Then cleaned up the parts.

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Grease added, and AC50 for protection, then put back in place.

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At some point I want to set up a zinc plating system at home to clean up all of the engine ironmongery to make the engine look more tidy. Many of the plated steel parts are starting to rust.

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Back to the question. Since I put this engine in the car in 2011, the up shift has been too late, even now with the control rod pushed as far back as it will go, it still shifts from 1 to 2 and 2 to 3 close to 3000rpm with a normal, gentle acceleration from stationary. This happens regardless of engine/transmission temperature.

I found that with the control rod disconnected it changed up very early and very smoothly below 1500rpm.

Can anyone suggest what can be done to reduce the shift point rpm?

Cheers
Jim

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Last edit: 05 Jun 2020 15:15 by Racediagnostics.

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05 Jun 2020 15:35 #248705 by micha77 560 SL 107.048 1988 Americas (USA/CAN)
Replied by micha77 on topic "Transmission to throttle link" bush missing
Hi Jim,

if I remembered well, the clip on the rod should adjust the shift point. Some millimeters back or forward and a check on a test drive.

Gruß
Michael

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05 Jun 2020 16:10 - 05 Jun 2020 16:11 #248710 by Racediagnostics 450 SL 107.044 1979
Replied by Racediagnostics on topic "Transmission to throttle link" bush missing
Hi Michael, from further reading I have found out that if the rod is set back, shifts will be early, and if set forwards, shifts will be late.

I have set mine as far back as possible and is is slightly improved from a week or so ago but still too late.

I do have a theory though. I have looked back at the pictures of my 1980 replacement 450 engine (from a 1980 car) I bought at the end of 2010.

See below, the rod is missing.

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I do not remember the detail, however I must have swapped the existing rod and lever over from my old 350 engine and used that.

Seen here.

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I am now wondering if perhaps the parts differed between the two engines.

I would appreciate if some one could check the part numbers for both the lever and rod for a 1976 350 engine vs a 1980 450 engine.

Cheers
Jim

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Last edit: 05 Jun 2020 16:11 by Racediagnostics.

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05 Jun 2020 16:29 - 05 Jun 2020 16:32 #248712 by micha77 560 SL 107.048 1988 Americas (USA/CAN)
Replied by micha77 on topic "Transmission to throttle link" bush missing
Hi Jim,

the rods and levers are the same.
Rod: A1170701475
Lever: A1170701821

Gruß
Michael
Last edit: 05 Jun 2020 16:32 by micha77.
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05 Jun 2020 17:20 - 05 Jun 2020 17:30 #248715 by Racediagnostics 450 SL 107.044 1979
Replied by Racediagnostics on topic "Transmission to throttle link" bush missing
Thanks, I finally found the same pn for the rod using the online epc, A1170701475 for the rod, but for the link to the side of the transmission it was A1152700859.

Anyway that theory goes out of the window. Next I will check on the connection between the rod and link and then the link to transmission.

Item 355 below.

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Cheers
Jim

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Last edit: 05 Jun 2020 17:30 by Racediagnostics.

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05 Jun 2020 17:49 #248719 by micha77 560 SL 107.048 1988 Americas (USA/CAN)
Replied by micha77 on topic "Transmission to throttle link" bush missing
Hi Jim,

these bushings in bad condition cause often malfunction:

A1159920310

Gruß
Michael
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06 Jun 2020 20:54 #248873 by Racediagnostics 450 SL 107.044 1979
Replied by Racediagnostics on topic "Transmission to throttle link" bush missing
With further adjustment to both the top of the rod and then "adding" some slack in on the bottom lever, I have made a significant improvement.

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Now with gentle acceleration the transmission shifts from 1 to 2 and from 2 to 3 just under 2000 rpm which is a big improvement.

Does anyone know what the correct shift RPM/speed values are for the 450SL?

Cheers
Jim

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06 Jun 2020 21:15 #248875 by micha77 560 SL 107.048 1988 Americas (USA/CAN)
Replied by micha77 on topic "Transmission to throttle link" bush missing
Have a look on the right 107.044. Click

Gruß
Michael
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06 Jun 2020 22:41 #248901 by Racediagnostics 450 SL 107.044 1979
Replied by Racediagnostics on topic "Transmission to throttle link" bush missing
Hi Michael, thank you, that is perfect!

One last question, can you tell me the difference between, Vollgas and Ubergas, I understand Vollgas means full throttle, but I am not sure how you can go higher than that?

Cheers
Jim

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06 Jun 2020 22:55 #248903 by micha77 560 SL 107.048 1988 Americas (USA/CAN)
Replied by micha77 on topic "Transmission to throttle link" bush missing
Hi Jim,

"Vollgas" means full throttle and "Übergas" is the Kickdown function.

Gruß
Michael
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