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  #1  
Old 02-24-2009, 08:47 AM
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1972 450Sl with shift flair

on my 72 450 SL , I get a flair between shifts 2-3, 138K on the speedo. I have searched but to no avail.
Did a tranny flush, used high mileage fluid and seems a tad better, could it be jsut worn or ajustment. No one around here will even look at the tranny -"too complicated"

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2015 Porsche Cayman - Elizabeth
2011 Porsche Cayman - Bond,James Bond
Sadly MERCEDESLESS - ALways LOOKING !
99 E320 THE Queen Mary - SOLD
62 220b - Dolly - Finally my Finny! Sadly SOLD
72 450SL, Pearl-SOLD
16 F350 6.7 Diesel -THOR
19 BMW X5 - Heaven on Wheels
14 38HP John Deere 3038E Tractor -Mean Green
84 300SD, Benjamin -SOLD
71 220 - W115-Libby ( my first love) -SOLD
73 280 - W114 "Organspende" Rest in Peace
81 380 SL - Rest in Peace
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  #2  
Old 02-24-2009, 09:10 AM
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You can get a shift kit (K1 spring kit) for the W124's tranny, maybe there is also one available for your car? It's basically an upgraded spring set for the 2-3 shift valve in the valve body in the tranny. On the W124, it's not too difficult to replace. Definitely sorted out my 300E's 2-3 flair.
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  #3  
Old 02-24-2009, 01:57 PM
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It raises the question of what passes for "not too complicated" in central Kentucky.
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  #4  
Old 02-24-2009, 02:23 PM
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Questions about "flush"

When you say you "flushed" this,how/what did you do?
MB transmissions are some of the few which have drain plugs on the torque converter to fully drain the whole enchilada!
If you only dropped the pan,you got only 20-30% of the fluid out.
I'm unable to locate my 107 service CD (still unpacking boxes after move 2 weeks ago)right now but will check other references for info about internal adjustments.
If whatever you did helped some,my guess is either a sticky valve or possibly an internal seal going south.138K isn't that much,but how it was taken care of overall makes a bigger difference than miles. My 74 has almost 180K but shifts just fine.I don't have service records but have found several areas that lead me to believe this car was very well tended to.
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  #5  
Old 02-24-2009, 02:46 PM
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Quote:
Originally Posted by deanyel View Post
It raises the question of what passes for "not too complicated" in central Kentucky.
haha don't know, but does not seem to be a lot of chatter about the R107 tranny of my cars vintage. I can handle most repairs but have not found a clear explanation of what is wrong

I flushed the whole deal, torque convertor, removed lines, ect ect,
I am not sure about the tranny history, I have a feeling it was taken care of but have no proof, other than the rest of the car was. I have the
722.004 tranny , at least that is what I think I have
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2015 Porsche Cayman - Elizabeth
2011 Porsche Cayman - Bond,James Bond
Sadly MERCEDESLESS - ALways LOOKING !
99 E320 THE Queen Mary - SOLD
62 220b - Dolly - Finally my Finny! Sadly SOLD
72 450SL, Pearl-SOLD
16 F350 6.7 Diesel -THOR
19 BMW X5 - Heaven on Wheels
14 38HP John Deere 3038E Tractor -Mean Green
84 300SD, Benjamin -SOLD
71 220 - W115-Libby ( my first love) -SOLD
73 280 - W114 "Organspende" Rest in Peace
81 380 SL - Rest in Peace
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  #6  
Old 02-24-2009, 04:36 PM
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Quote:
Originally Posted by meltedpanda View Post
on my 72 450 SL , I get a flair between shifts 2-3, 138K on the speedo. I have searched but to no avail.
Did a tranny flush, used high mileage fluid and seems a tad better, could it be jsut worn or ajustment. No one around here will even look at the tranny -"too complicated"

Just for the hell of it, remove(unscrew) the modulator on the trans(might leak a bit of fluid), and remove the dome shaped plastic cap. You'll see a small O-ring. Repalce the o-ring.

Also inside the modulator, you'll see a flat metal key like plunger. Lift up the pluger a bit and turn in CCW(I believe) one notch. Put everything back together and reinstall(screw in) modulator on the trans(new crush washer). See how it drives. If the shifting seems a bit softer, readjust the plunger 1 notch CW from where you first started(2 nothches CW.) Drive it again. Might have to try several times to get it right.

Might help, might not. Won't cost nothing but a o-ring and washer. Only takes 10 minutes to remove modulator, so in the course of an hour or so and maybe $1, you might fix the problem, or not.

PS... They'll be a vacuum hose attached to the modulator plastic cap. Make sure thats not leaking. Replace if bad.
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  #7  
Old 02-24-2009, 08:25 PM
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Quote:
Originally Posted by 450slcguy View Post
Just for the hell of it, remove(unscrew) the modulator on the trans(might leak a bit of fluid), and remove the dome shaped plastic cap. You'll see a small O-ring. Repalce the o-ring.

Also inside the modulator, you'll see a flat metal key like plunger. Lift up the pluger a bit and turn in CCW(I believe) one notch. Put everything back together and reinstall(screw in) modulator on the trans(new crush washer). See how it drives. If the shifting seems a bit softer, readjust the plunger 1 notch CW from where you first started(2 nothches CW.) Drive it again. Might have to try several times to get it right.

Might help, might not. Won't cost nothing but a o-ring and washer. Only takes 10 minutes to remove modulator, so in the course of an hour or so and maybe $1, you might fix the problem, or not.

PS... They'll be a vacuum hose attached to the modulator plastic cap. Make sure thats not leaking. Replace if bad.

Will try it if the weather holds for this weekend, so this may help a flair??, don't really have a'soft shift, or perhaps a soft shift is a flair
Hmmm. In any respect , looks like I need to check out the modulator ,at least the lines for leaks, thanks
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2015 Porsche Cayman - Elizabeth
2011 Porsche Cayman - Bond,James Bond
Sadly MERCEDESLESS - ALways LOOKING !
99 E320 THE Queen Mary - SOLD
62 220b - Dolly - Finally my Finny! Sadly SOLD
72 450SL, Pearl-SOLD
16 F350 6.7 Diesel -THOR
19 BMW X5 - Heaven on Wheels
14 38HP John Deere 3038E Tractor -Mean Green
84 300SD, Benjamin -SOLD
71 220 - W115-Libby ( my first love) -SOLD
73 280 - W114 "Organspende" Rest in Peace
81 380 SL - Rest in Peace
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  #8  
Old 02-24-2009, 09:15 PM
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Quote:
Originally Posted by meltedpanda View Post
Will try it if the weather holds for this weekend, so this may help a flair??, don't really have a'soft shift, or perhaps a soft shift is a flair
Hmmm. In any respect , looks like I need to check out the modulator ,at least the lines for leaks, thanks

If the modulator is leaking vacuum from the hose connector or O-ring as mine was, shifting will be a hard jolt between gears. My O-ring crumpled in my fingers upon removal. I proceeded to adjust plunger the wrong way and the shift went very mushy, felt like it was slipping or just not engaging gears properly. I adjusted 2 notches the other way and all was good. I believe CCW was softer, CW was firmer, but don't quite remember for sure.
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Last edited by 450slcguy; 02-24-2009 at 09:31 PM.
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  #9  
Old 02-24-2009, 10:31 PM
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so with that information - since mine is not jolting, perhaps a simple adjustment CW??? hmm - That is worth a try- seems logical...
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Ron
2015 Porsche Cayman - Elizabeth
2011 Porsche Cayman - Bond,James Bond
Sadly MERCEDESLESS - ALways LOOKING !
99 E320 THE Queen Mary - SOLD
62 220b - Dolly - Finally my Finny! Sadly SOLD
72 450SL, Pearl-SOLD
16 F350 6.7 Diesel -THOR
19 BMW X5 - Heaven on Wheels
14 38HP John Deere 3038E Tractor -Mean Green
84 300SD, Benjamin -SOLD
71 220 - W115-Libby ( my first love) -SOLD
73 280 - W114 "Organspende" Rest in Peace
81 380 SL - Rest in Peace
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  #10  
Old 02-24-2009, 10:45 PM
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Quote:
Originally Posted by meltedpanda View Post
so with that information - since mine is not jolting, perhaps a simple adjustment CW??? hmm - That is worth a try- seems logical...
Can't hurt, and costs nothing.
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  #11  
Old 02-25-2009, 01:32 AM
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Remember that adjusting the modulator will affect ALL gear changes, not just the 2-3 shift. I'd say there is still an underlying problem, but play around with the adjustment as per the advice - you should get the 2-3 shift firmer that way and, if you can live with firmer 1-2 shifts as well, then that may be your solution for now.

My guess is that it's more than likely a valve/spring/seal problem. My Haynes manual details the removal and total disassembly of the valve body, but doesn't mention anything about specific problems. Send me a PM if you want me to mail this to you.
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  #12  
Old 03-02-2009, 09:14 AM
Dan
 
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There is some variation in design of the modulator valve. On my '74 450 SL there is no plastic cap to remove. Instead you put an allen key into the hole where the vacume line was attached and turn a plunger inside for the adjustment. It's very hard to turn. My modulator valve was frozen and my transmission shifted very hard going into second and had no problems shifting into third. When I received my new modulator valve I attached a vacume pump to it and I could see the plumger pin move in and out with vacume. The old one did not move at all. Do a search on my name and you will find my previous entries about this subject with some pictures............Dan
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  #13  
Old 03-02-2009, 10:41 AM
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I adjusted the linkage but due to weather have not tested yet, it was out of wack. I got to looking for my modulator/vacuum lines, and you are right I did not see a plastic cap, in fact I am kinda confused as to where it is. The drivers side has the safety switch, the other side had a hard line going into a banjo fitting, and two steel domed caps.
I am hoping the adjustments I made will help, in my case harder shifts would be welcomed, I have a flair , or I hope HAD a flair, will let you know. In the meantime anyone with a visual of the 72 tranny and where stuff is located?
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Ron
2015 Porsche Cayman - Elizabeth
2011 Porsche Cayman - Bond,James Bond
Sadly MERCEDESLESS - ALways LOOKING !
99 E320 THE Queen Mary - SOLD
62 220b - Dolly - Finally my Finny! Sadly SOLD
72 450SL, Pearl-SOLD
16 F350 6.7 Diesel -THOR
19 BMW X5 - Heaven on Wheels
14 38HP John Deere 3038E Tractor -Mean Green
84 300SD, Benjamin -SOLD
71 220 - W115-Libby ( my first love) -SOLD
73 280 - W114 "Organspende" Rest in Peace
81 380 SL - Rest in Peace
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  #14  
Old 03-03-2009, 03:37 PM
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My memeory is like a sieve but I don't remember any vacuum line going to the trans on my '73. I just reinstalled it. Checked the one out of my '72 and can't find one there either.

Good luck, warm weather is just around the corner.
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  #15  
Old 03-03-2009, 03:54 PM
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I cant find it either, so no vacuum adjusts here, sounds implausible
There is a hard line to a banjo fitting that may be it

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Ron
2015 Porsche Cayman - Elizabeth
2011 Porsche Cayman - Bond,James Bond
Sadly MERCEDESLESS - ALways LOOKING !
99 E320 THE Queen Mary - SOLD
62 220b - Dolly - Finally my Finny! Sadly SOLD
72 450SL, Pearl-SOLD
16 F350 6.7 Diesel -THOR
19 BMW X5 - Heaven on Wheels
14 38HP John Deere 3038E Tractor -Mean Green
84 300SD, Benjamin -SOLD
71 220 - W115-Libby ( my first love) -SOLD
73 280 - W114 "Organspende" Rest in Peace
81 380 SL - Rest in Peace
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