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  #1  
Old 09-20-2010, 08:12 PM
muleears's Avatar
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Overfull transmission. Effects?

My son's new 85 123 has at least an extra pint, maybe two in the tranny. The reading on the dipstick is one inch above full. It was checked warm and running. Just determined this and will drain the excess ASAP. My question is, how would this make the transmission act and what will it damage? Currently the tranny likes to shift at speeds a little higher than normal and won't shift into 4th until 50+. Can I expect better shifting when the level is proper? Or will the fluid level have no effect on how it shifts? I'll drain the excess tomorrow, just wondering what to expect. TIA.
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  #2  
Old 09-20-2010, 10:25 PM
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Shouldn't make any difference shifting

Correct levels will avoid excess leakage from seals and O rings. It might cause a bit of extra heat if the level is really high. Not to worry but also don't expect much better shifting. Cheers
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  #3  
Old 09-20-2010, 10:49 PM
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Overfilled transmissions have foaming fluid. Foaming fluid doesn't lubricate well, so it wouldn't give you characteristics of better shifting.
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  #4  
Old 09-21-2010, 02:48 PM
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Im not sure about the effects of being overfilled, but if there is a cable that runs down to the engine on your 123 like there is on my 126 (pretty sure there is) It is called your bowden cable. The cable is attached to the linkage assembly that actuates the injection pump. There is an adjustment for it ontop of the engine near the linkage assembly connected to the injection pump. This will adjust at what rpm your transmission changes gears. Shifting into 4th at 50mph with light acceleration is silly. Screw your bowden adjustment in about 2 or 3 turns and you should be all set. How cool is it that you can pop your hood and adjust your trans shift points with no tools in about 10 seconds. I love these cars....
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Old 09-21-2010, 06:14 PM
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I didn't want to touch the bowden until I had the correct level in the trans. Haven't had a chance to do that yet. Maybe tomorrow. Thanks for the input.
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Muleears
'07 E320 Bluetec 133K my DD
'04 Jaguar XJ8 VDP, 34K
'10 Hyundai Accent 60K Grocery Getter
'02 VW Golf soon to be on the road again
'97 E300 Diesel Son's DD
'61 VERY tolerant wife

Hampton Roads, VA USA

Gone but not forgotten:
'67 250S 95K
'86 300SDL
'87 300D Turbo, 364K! R.I.P.
'98 E300 Turbodiesel, 213K
'02 S420, 164K
'01 Prius 138K
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  #6  
Old 09-21-2010, 06:38 PM
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That sucks.... I had that happen to me the last time I pulled the pan and filled it. It was about 2 inches above the top mark.

Last month I finally dumped a bunch out and the level was barely on the stick. I went for a 15 minute drive, came back and checked it again. It was right on the money.

2 days later I went for a "3 hour tour". When I fueled up I checked it again and it was still 2 inches up on the damn stick!!

Back to the drawing board...
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  #7  
Old 09-21-2010, 07:31 PM
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Quote:
Originally Posted by snookwhaler View Post
That sucks.... I had that happen to me the last time I pulled the pan and filled it. It was about 2 inches above the top mark.

Last month I finally dumped a bunch out and the level was barely on the stick. I went for a 15 minute drive, came back and checked it again. It was right on the money.

2 days later I went for a "3 hour tour". When I fueled up I checked it again and it was still 2 inches up on the damn stick!!

Back to the drawing board...
Yes, getting a consistent reading can be a challenge with these.

You didn't have any adverse trans. issues with it that full?
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Muleears
'07 E320 Bluetec 133K my DD
'04 Jaguar XJ8 VDP, 34K
'10 Hyundai Accent 60K Grocery Getter
'02 VW Golf soon to be on the road again
'97 E300 Diesel Son's DD
'61 VERY tolerant wife

Hampton Roads, VA USA

Gone but not forgotten:
'67 250S 95K
'86 300SDL
'87 300D Turbo, 364K! R.I.P.
'98 E300 Turbodiesel, 213K
'02 S420, 164K
'01 Prius 138K
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