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colin488
Date registered: Dec 1899
Location:
Vehicle(s):
| Auto box trouble
Hi, I've got a 2002 facelift ml 270 with brabus D4 upgrade. The Car is great apart from some slipping in the auto box, on full or 3/4 throttle when it changes gear it appears to slip and will rev to 4,500 rpm for a split second. also it sometimes seems to take a while to engage reverse. My local dealer thought it was the electrohydraulic control unit and wanted £1200.00 to change it but wasn't sure. An Indie gearbox man says it's water getting into the gearbox through the radiator which has caused corrosion / wear. My guy who serviced it changed the gearbox oil and noticed that it was very black/burned and there was some metal swarf in the sump. Also the gear lever seems to get quite warm on a long run. Any ideas??  |
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cmitch
Expert
Date registered: Apr 2006
Location: Ala-Tenn
Vehicle(s): 2002 ML320, 2005 S430 4Matic, 2010 F150 Super Crew
Posts: 3412
| RE: Auto box trouble
Oh, SH&^! I would change the oil again and the filter, too. But it looks like you've got a bad tranny.
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roadsession
Date registered: Dec 1899
Location:
Vehicle(s):
| RE: Auto box trouble
colin488 - 2/28/2007 2:29 AM
Hi, I've got a 2002 facelift ml 270 with brabus D4 upgrade. The Car is great apart from some slipping in the auto box, on full or 3/4 throttle when it changes gear it appears to slip and will rev to 4,500 rpm for a split second. also it sometimes seems to take a while to engage reverse. My local dealer thought it was the electrohydraulic control unit and wanted £1200.00 to change it but wasn't sure. An Indie gearbox man says it's water getting into the gearbox through the radiator which has caused corrosion / wear. My guy who serviced it changed the gearbox oil and noticed that it was very black/burned and there was some metal swarf in the sump. Also the gear lever seems to get quite warm on a long run. Any ideas?? :banghead:
try changing transmission fluid and filter... |
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Marcelc
Date registered: Dec 1899
Location:
Vehicle(s):
| RE: Auto box trouble
colin488 - 2/28/2007 7:29 AM
Hi, I've got a 2002 facelift ml 270 with brabus D4 upgrade. The Car is great apart from some slipping in the auto box, on full or 3/4 throttle when it changes gear it appears to slip and will rev to 4,500 rpm for a split second. also it sometimes seems to take a while to engage reverse. My local dealer thought it was the electrohydraulic control unit and wanted £1200.00 to change it but wasn't sure. An Indie gearbox man says it's water getting into the gearbox through the radiator which has caused corrosion / wear. My guy who serviced it changed the gearbox oil and noticed that it was very black/burned and there was some metal swarf in the sump. Also the gear lever seems to get quite warm on a long run. Any ideas?? :banghead:
Someone else with a Brabus modified 270 had a tranny failure, it maybe that the extra power is too much for the gearbox?
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john
Date registered: Dec 1899
Location:
Vehicle(s):
| RE: Auto box trouble
colin488 - 2/28/2007 7:29 AM
Hi, I've got a 2002 facelift ml 270 with brabus D4 upgrade. The Car is great apart from some slipping in the auto box, on full or 3/4 throttle when it changes gear it appears to slip and will rev to 4,500 rpm for a split second. also it sometimes seems to take a while to engage reverse. My local dealer thought it was the electrohydraulic control unit and wanted £1200.00 to change it but wasn't sure. An Indie gearbox man says it's water getting into the gearbox through the radiator which has caused corrosion / wear. My guy who serviced it changed the gearbox oil and noticed that it was very black/burned and there was some metal swarf in the sump. Also the gear lever seems to get quite warm on a long run. Any ideas?? :banghead:
I had a similar problem with my ML270.....changing the oil and filter didnt help......i eventually fitted a new tranny as the 'flare' (between 3rd and 4th change) became progressively worse.
The gearlever would probably be getting warm due to the heater ducting pipes inside the centre console which supply heated/cooled air out of the rear of the console
Regarding 'water in the gearbox'......this is a known problem but only applies to certain mercedes saloon models where the engine radiator and the tranny oil cooling radiator were combined as one unit, some of these units were failing and allowing the fluids to mix....(the radiator was later modified)
The ML tranny oil cooler is a totally separate, stand alone unit from the radiator and is mounted just in front of and below the radiator. |
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colin488
Date registered: Dec 1899
Location:
Vehicle(s):
| RE: Auto box trouble
I've got an aftermarket warranty that will allegedley cover any mechanical issues but not electrical so I think I'll book it in for a strip down and hope it's mechanical and covered by the warranty. The only thing that concerns me is whether it's to do with the electrohydraulic unit because I know that's not covered. Has anyone had to replace this unit if so what are the symptoms?
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