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  #1  
Old 01-31-2010, 03:35 PM
showme's Avatar
Mama's 300D
 
Join Date: Jan 2008
Location: Missouri
Posts: 482
Frozen Speedo problem-need advice

We bought my wife's 81 300D 3 years ago with a non-functioning speedometer. The PO told us it worked for his wife until a severely cold morning, and quit working when she took off for work one morning. I bought a new cable, and finally installed it last winter, and it's worked great until a few weeks ago. On another frigid morning, my wife went somewhere, and the speedo\odo is not functioning again, so I'm readying myself to install a new cable. Here's my question...
Last time I installed the new cable, I noticed there was a rubber boot "cup" that installs over the connection at the tranny. I surmised that the boot got water in it, froze solid and the cable broke when the car started to move, with the ice filled tranny rubber being the culprit. Is there anyone who has figured out how to stop this freezing of trapped water (or whatever it is) at that point? Would drilling weep holes in the boot help\hurt? Would leaving the boot off altogether be a bad idea? Or is there some sort of non freezing substance that I could fill it with? Thanks for any suggestions. I don't want to have to replace a $47 cable every year when the temps get cold.
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1951 Chevy 3100

2003 Indian Chief Roadmaster

1983 GMC 1 ton Dually

1982 Chevy 1 ton Dually, service body (sold)

'90 GMC Suburban 6.2 "SS Veg-Burban"
(single tank WVO\diesel conversion) SOLD

'81 300D ~ Mama's car...my job (now my car)(but still my job) SOLD

'83 300sd ~ rescue car SOLD

2005 Ford Taurus (Mama's new car)(NOT my job!)
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  #2  
Old 01-31-2010, 03:51 PM
Aquaticedge's Avatar
Bump on a log
 
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Location: See Biography
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could be the grease in the cable got stiff enough depending on how cold it got. Stranger things have happend
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1987 300TD 311,000M Stolen. Presumed destroyed
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  #3  
Old 01-31-2010, 03:54 PM
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Rogue T Tolerant
 
Join Date: Jul 2009
Location: North America
Posts: 1,392
My car makes this weird noise from under the dash when the car is cold. I figured it had something to do with the spedo cable's lubrication getting hard in the cold.

Would dripping some ATF or gear oil down the line fix the issue?
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Going back to the original post: "Can you get the vac to blow instead?" No. Vacuums are low pressure so they by nature "suck" and nature abhors them.
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  #4  
Old 01-31-2010, 08:44 PM
showme's Avatar
Mama's 300D
 
Join Date: Jan 2008
Location: Missouri
Posts: 482
Not sure. But the cable was an OEM part, and the old, broken one I took off the first time was a clean break at the transmission connection. I would have thought that the rubber is there to keep everything out, including water that might freeze. The sad part is that the cable had a two year warranty- and I waited a year and a half to put it on. Anyway, if anybody knows of some sort of non-freezing lube that I can put on there, let me know.

Why did I wait that long?? I didn't want to put it on and find out it was something more expensive. It's one of those "just-in-case" quirks that I posess. I could have kicked myself after I finally did. One of the easiest repairs I've ever done, and we drove all that time with a Garmin Forerunner strapped to the steering wheel to know the mph. Anyway...
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"Knowing is not enough, we must apply.
Willing is not enough, we must do." Goethe

***********************************


1951 Chevy 3100

2003 Indian Chief Roadmaster

1983 GMC 1 ton Dually

1982 Chevy 1 ton Dually, service body (sold)

'90 GMC Suburban 6.2 "SS Veg-Burban"
(single tank WVO\diesel conversion) SOLD

'81 300D ~ Mama's car...my job (now my car)(but still my job) SOLD

'83 300sd ~ rescue car SOLD

2005 Ford Taurus (Mama's new car)(NOT my job!)
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  #5  
Old 01-31-2010, 08:53 PM
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Location: Lexington, NC or Boone, NC
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You may have a perfectly good cable but a slipped gear, etc, in the speedometer itself.
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"What could possibly go wrong?"

~Michael S.~ -
1986 M-B 300SDL, retired due to rust and electrical problems. Donated engine to:
1987 M-B 300SDL, odo dead. New project.
1982 M-B 240D, odo stopped at 308,000
1982 M-B 300SD, 175,000
1989 Dodge Ramcharger, 87,000 - 4wd, 318
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  #6  
Old 01-31-2010, 09:43 PM
showme's Avatar
Mama's 300D
 
Join Date: Jan 2008
Location: Missouri
Posts: 482
Ahhh. Hmmm. It seems like I'd hear lots of clattering upstairs if that were the case, but you never know! (At least I won't be surprised if I find that, now). But, knowing the history of the first break, and seeing how the circumstances are akin to the second break, I'm afraid it's back under the beast, anyhow. But thank you. I will remember this when I find out that you're right!
__________________
"Knowing is not enough, we must apply.
Willing is not enough, we must do." Goethe

***********************************


1951 Chevy 3100

2003 Indian Chief Roadmaster

1983 GMC 1 ton Dually

1982 Chevy 1 ton Dually, service body (sold)

'90 GMC Suburban 6.2 "SS Veg-Burban"
(single tank WVO\diesel conversion) SOLD

'81 300D ~ Mama's car...my job (now my car)(but still my job) SOLD

'83 300sd ~ rescue car SOLD

2005 Ford Taurus (Mama's new car)(NOT my job!)
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  #7  
Old 01-31-2010, 09:46 PM
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Location: Lexington, NC or Boone, NC
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Quote:
Originally Posted by showme View Post
Ahhh. Hmmm. It seems like I'd hear lots of clattering upstairs if that were the case, but you never know! (At least I won't be surprised if I find that, now). But, knowing the history of the first break, and seeing how the circumstances are akin to the second break, I'm afraid it's back under the beast, anyhow. But thank you. I will remember this when I find out that you're right!
I may be wrong, but when I got our 240D, neither the speedometer nor the odometer worked. After a new speedometer cable, the speedo worked but the odometer was still slipping. Did the dieselgiant odometer fix, and it worked. I'm just thinking maybe it's something like this.

However, it may be that there are no other linkages between the cable and the speedometer gauge part of the unit. If that's true, then mine was an invalid guess. It may be worth dismantling and taking a look, though.
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http://www.appstate.edu/~salleyms

"What could possibly go wrong?"

~Michael S.~ -
1986 M-B 300SDL, retired due to rust and electrical problems. Donated engine to:
1987 M-B 300SDL, odo dead. New project.
1982 M-B 240D, odo stopped at 308,000
1982 M-B 300SD, 175,000
1989 Dodge Ramcharger, 87,000 - 4wd, 318
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