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#1
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450 SL transmission problem
I recently purchase a 1977 450SL with 170,000 well maintained miles. On my way home with the car from Kansas City to Arkansas, I noticed that the car stopped upshifting from 1-2. It will shift by letting off the accelerator. Also, on the 2-1 down thift there is an audible thump in the transmission. It goes into reverse fine though. The transmission fluid is brown so I ordered a gasket and filter set and plan to change and see if that helps, I've also read that the B-2 piston on these models is a problem. Any suggestions?
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#2
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450 SL tranny
I'd say your starting on the right track by changing the fluid. That could make a big difference. Be sure they (you) change the torgue converter fluid too. I believe the B2 piston affects reverse first. Not sure, anyone? It's referred to as catastrophic transmission failure. That's enough to scare the **** out of ya.
sbr '79 450SL milanbraun/palomino 76,000mi. |
#3
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Brown fluid - very bad sign. Depending on how often the fluid was changed you could cause the tranny to fail by changing the fluid. I have it from several dependable sources that if the tranny has not had regular fluid changes, when you put fresh fluid in, they often fail within a few months of the change.
The B2 piston is not used for reverse at all. Its my guess that you are in for a rebuild soon.
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I got too many cars!! Insurance eats me alive. Dave 78 Corvette Stingray - 3k 82 242 Turbo Volvo - Manual - 270k 86 300e 5 speed manual - 210k 87 420sel - 240k 89 560sl - 78k 91 420sel - 205k 91 560sel - 85k 94 GMC Suburban - 90k 97 Harley Davidson Heritage Softail - 25k 00 GMC Silverado 1 ton 30k |
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