AndyBill402 Posted November 14, 2010 Share Posted November 14, 2010 Transmission oil is dripping out of the speedometer input (where the cable screws into my TH350). I lose about a quart every 2 weeks. How do I fix it? Quote Link to comment Share on other sites More sharing options...
7tonemonte Posted November 14, 2010 Share Posted November 14, 2010 It looks like I developed a leak in the same spot,I didnt know if it was possibly the convertor draining back into the pan from sitting,and it being overfilled? I noticed mine after sitting for a few weeks of no driving, curious to see what advice is here Quote Link to comment Share on other sites More sharing options...
Sam (Bones) Posted November 14, 2010 Share Posted November 14, 2010 there's probably a O-ring or seal in there that has went bad, pull the speedo unit out and take it apart, there will bee an outer O-ring too Quote Link to comment Share on other sites More sharing options...
footballubet Posted November 14, 2010 Share Posted November 14, 2010 If the center of housing where the cable goes in to it you can buy the housing. Quote Link to comment Share on other sites More sharing options...
58impala Posted November 16, 2010 Share Posted November 16, 2010 Take cable off input [you said a naughty!]. Pull input [you said a naughty!]. out and take to transmission shop. Cost me $2.50 and took them 5 minutes. Quote Link to comment Share on other sites More sharing options...
58impala Posted November 16, 2010 Share Posted November 16, 2010 Not [you said a naughty!]. assembly Quote Link to comment Share on other sites More sharing options...
7tonemonte Posted November 16, 2010 Share Posted November 16, 2010 Thanks for that info....Pretty funny you cant abbreviate assembly I had to hit the Quote button to reply to understand what you were cursing about Welcome to the site and club by the way!!! Quote Link to comment Share on other sites More sharing options...
wallaby Posted November 16, 2010 Share Posted November 16, 2010 ...Pretty funny you cant abbreviate assembly Maybe it should be assy.? That's pretty funny though: I was trying to read the post and was inserting my own imagined bad words and it wasn't working out too well... Quote Link to comment Share on other sites More sharing options...
kc8oye Posted November 17, 2010 Share Posted November 17, 2010 the speedo sender isn't under fluid when the engine is not running.. allthough some fluid will pool in the tail shaft housing, more likely it's leaking much more when running. is it leaking from where the speedo cable attaches? or is it leaking where the unit the speedo cable attaches is in the trans case? either way, as suggested, just remove it, and have a trans shop throw some new seals at it. Quote Link to comment Share on other sites More sharing options...
Big Jim Posted November 17, 2010 Share Posted November 17, 2010 I had the same problem and found the aluminum speedo gear housing was bad. Replaced it with a new steel speedo gear housing I bought off of Ebay and has not leaked since. Be careful not to loose the gear into the transmission when you pull the housing.Check out this link http://www.transmissioncenter.net/speedo...J2godaUAAGw#350 Quote Link to comment Share on other sites More sharing options...
overdrive Posted November 25, 2010 Share Posted November 25, 2010 Check the shaft of the driven gear for wear. It's the plastic part that the square end on the cable fits into. Mine was worn and the new o-ring wasn't enough to seal it. I bought a new gear. They're cheap. The Parts Place has them: Automatic Transmission & Related Parts - SPEEDOMETER GEARS - AUTOMATIC Product Name Price AT6322Z (1970 - 1981 Monte Carlo) LIGHT GREEN AUTOMATIC SPEEDOMETER GEAR (34 TOOTH) $15.00 AT6323Z (1970 - 1981 Monte Carlo) ORANGE AUTOMATIC SPEEDOMETER GEAR (35 TOOTH) $15.00 AT6324Z (1970 - 1981 Monte Carlo) WHITE AUTOMATIC SPEEDOMETER GEAR (36 TOOTH) $15.00 AT6325Z (1970 - 1981 Monte Carlo) RED AUTOMATIC SPEEDOMETER GEAR (37 TOOTH) $15.00 AT6326Z (1970 - 1981 Monte Carlo) BLUE AUTOMATIC SPEEDOMETER GEAR (38 TOOTH) $15.00 AT6327Z (1970 - 1981 Monte Carlo) BROWN AUTOMATIC SPEEDOMETER GEAR (39 TOOTH) $15.00 AT6328Z (1970 - 1981 Monte Carlo) BLACK AUTOMATIC SPEEDOMETER GEAR (40 TOOTH) $15.00 AT6329Z (1970 - 1981 Monte Carlo) YELLOW AUTOMATIC SPEEDOMETER GEAR (41 TOOTH) $15.00 AT6330Z (1970 - 1981 Monte Carlo) GREEN AUTOMATIC SPEEDOMETER GEAR (42 TOOTH) $15.00 AT6331Z (1970 - 1981 Monte Carlo) PURPLE AUTOMATIC SPEEDOMETER GEAR (43 TOOTH) $15.00 AT6332Z (1970 - 1981 Monte Carlo) GRAY AUTOMATIC SPEEDOMETER GEAR (44 TOOTH) $15.00 AT6333Z (1970 - 1981 Monte Carlo) LIGHT BLUE AUTOMATIC SPEEDOMETER GEAR (45 TOOTH) $15.00 Dan Quote Link to comment Share on other sites More sharing options...
AndyBill402 Posted November 25, 2010 Author Share Posted November 25, 2010 Thanks to everyone for the information. I was going to work on the car this weekend, but it's raining and the temperature is going to be in the low 30's. So, I guess I'll just lose some more xmission fluid until it warms up a bit. I have a small pail strategically placed under the leak. BTW, I can't tell exactly where the leak is except that it drips off the speedo shaft where it screws to the transmision. Quote Link to comment Share on other sites More sharing options...
wallaby Posted November 27, 2010 Share Posted November 27, 2010 Sometimes it's hard to see exactly where a trans fluid leak is. The fluid isn't dark enough and the background color of a cleaned trans case is also light in color... I'd remove the speedo cable, then clean the area well with brakecleaner, let it dry, then dust the area well with talcum powder. Any further leaking will show up clearly. It will show up as red as it dampens the powder, or create a visible trail. Quote Link to comment Share on other sites More sharing options...
bobsmc Posted November 27, 2010 Share Posted November 27, 2010 another common leak point is the selector shaft seal. even the rebuilt one i bought from tci leaked. i found that if you double up the seal[two seals] the problem is solved.mine would leak after sitting long enough for the converter to drain into the pan,which raised the level in the pan above the selector shaft.they are located on the same side so it is possible that it is leaking along the pan to the lowest point near the speedo housing. bob Quote Link to comment Share on other sites More sharing options...
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