Quote:
Originally Posted by jkubica
Hello All
My 1985 300td's speedometer jumps all around when I first starting rolling cold until I get up to about 10MPH - after which it works perfectly. After it begins working well it doesn't jump anymore even below 10MPH.
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That is a sign the cable is getting dry - the next stage is you'll hear a loud Buzz!
I have always used ATF, it works like magic. Fill the small cup that surrounds the cable connection to the gauge and blow it into the cable with your mouth. Wait for bubbles to come out and repeat 2 or 3 times. It's a permanent fix.
SAE 90W is a very heavy oil that will not penetrate and will thicken even more in cold weather giving problems.