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Crazy Tranny
Been driving a '97 E320 for the past three years. As soon as the outside temp drops to approx 40-45 degrees, the tranny 1.) slips and 2.) will not upshift out of first. Posted initially a couple of years ago and someone said it could be some type of spring that's internal. MB dealer said, drumroll here, replace the transmission. I've done nothing because...if I shift it to "4" rather than "D" it works great. After a mile or so, I flick it over to "D" and I have no more issues until it sits and gets completely cold again. I have noticed when it's really cold that it slips in "R" also. I have no idea what's going on internally with Drive versus "4". Why would one work perfectly, and the other be a dog in the cold? Does it really need a new tranny, or is it something a little less costly? Actually went to two MB dealers, and both said replace based on nothing more than a test drive after the car sat out in the cold overnight. Two independent shops spent some time looking into the problem, but both stated MB has proprietary equipment that keeps them from really troubleshooting this electronic tranny? Any thoughts? Thanks.
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2manycars 02 ML320 (SOLD) 98 SL500 03 E320 89 260E 75 450SL 98 Chev Silverado K1500 (SOLD) 02 Chev Avalanche 2500 05 Harley Davidson Ultra Classic 02 27' Toy Hauler |
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Quote:
The cause can be stuck valve, broken pressure regulator spring in the valve body, worn clutches, contaminated never change (sealed for life) fluid or filter. If no codes, I would remove the pan, if you find metal or clutch material its time you a rebuilt, clean check for a broken PR spring while your in there.
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Steve Cattaneo www.mastertechtrans.com 03 SL500 02 MB AMG 87 560 SEC 87 300D 928S 83 85 928 S2 EURO |
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Thanks for the reply. I did have the fluid changed two years ago (when problem noted) and they did state no metal in oil. Also, no fault codes present. Problem is MB doesn't want to chekc PR spring (would rather go for new transmission). Can an independent do this, or do they need any special equipment?
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2manycars 02 ML320 (SOLD) 98 SL500 03 E320 89 260E 75 450SL 98 Chev Silverado K1500 (SOLD) 02 Chev Avalanche 2500 05 Harley Davidson Ultra Classic 02 27' Toy Hauler |
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Quote:
Any one mechanically inclined can change or check this spring. I posted the procedure here, http://forums.mbworld.org/forums/showthread.php?t=151331 post #23
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Steve Cattaneo www.mastertechtrans.com 03 SL500 02 MB AMG 87 560 SEC 87 300D 928S 83 85 928 S2 EURO |
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