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#1
12-12-2003, 05:01 PM
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W126 Transmission going bad???
Hello, I have a 1990 300SE with a little over 200K. On the 2-3 upshift there is a slight flair when driving "normal" under full throttle I do not think it has the flair. Any ideas about what could be the problem? Normal wear?
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1969 RS/SS Camaro Conv. L-89 Alum. Head 396 375HP 4-spd 1987 GNX #419, 2002 RX300 FS: 1934 Ford Street Rod, Blown 383 $48,500 Firm http://banners.wunderground.com/bann.../worcester.gif 
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#2
12-12-2003, 05:53 PM
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Has the trans been worked on before? If not, 200k miles is a lot of road to cover. Try and have your trans adjusted by a technician. If that doesn't help it's probably time for a rebuild.
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#3
12-13-2003, 09:03 AM
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never had any work done, just changing fluid and filter
It just seems to have a flair in cold weather 30F and below
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1969 RS/SS Camaro Conv. L-89 Alum. Head 396 375HP 4-spd 1987 GNX #419, 2002 RX300 FS: 1934 Ford Street Rod, Blown 383 $48,500 Firm http://banners.wunderground.com/bann.../worcester.gif
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#4
12-13-2003, 05:17 PM
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What is a "flair"? Slippage? Hesitation?
My tranny seems to be o.k, but shifts hard. I think it is the drive shaft center bearing bushing. I do know that the mechanic can easily adjust the vacuum (is that the right word?) required to produce a shift. As in, it will downshift quicker, or slower (require more foot in the gas to downshift).
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Jason 1990 300TE 210k miles Engine: 103.983 Chassis: 124.090 17/27 mpg  :
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#5
12-13-2003, 05:24 PM
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As mentioned above you can probably make an improvement through some adjustments.
Basically, you need to shift sooner and/or harder. Lengthen the control pressure cable for the first, run the modulator in a turn for the second. And yes, the problem is caused by wear. The actual condition is the result of either taking too long to fill the clutch pack (due to more space as the plates wear) or clutch piston seal leakage. Both delay the onset of the next gear.
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Steve Brotherton Continental Imports Gainesville FL Bosch Master, ASE Master, L1 33 years MB technician
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#6
12-13-2003, 06:06 PM
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adjustment
"Basically, you need to shift sooner and/or harder. Lengthen the control pressure cable for the first, run the modulator in a turn for the second."
I mentioned that my tranny was shifting a little "hard", and my mechanic did adjustment #1. I didn't know it was possible to do adjustment #2. I will see if my mechanic can reverse adjustment #1 and instead do the adjustment #2 to try to ease the "harshness" of the shift.
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Jason 1990 300TE 210k miles Engine: 103.983 Chassis: 124.090 17/27 mpg :
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#7
12-13-2003, 06:42 PM
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Tranny Flair
Mine was flairing recently, warm or cold, I changed the filter and fluid at 205,000 and no more flairing, it shifts firm as I think it should be.
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 1991 300SE (my ride, 279,000 miles, looks almost new 1954 Cadillac (21 yo son's car, he bought when age 15) 1972 SeaBird 19 ft runabout (old but solid, slant six, Volvo sterndrive perfect condition, undergoing complete overhaul and refit) 1998 Toyota Rav4 (my sons daily driver when he is in the Continental US, PROUDLY serving in US Navy)
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#8
12-14-2003, 08:13 AM
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Thanks for your help guys,
I am going to try to change the fluid/filter first. If that doesn't do anything I will try to adjust the control pressure cable (I think in GM terms that is the TV cable). I always liked the way the MB trans shifted, firm but not harsh. Thanks, Dan
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1969 RS/SS Camaro Conv. L-89 Alum. Head 396 375HP 4-spd 1987 GNX #419, 2002 RX300 FS: 1934 Ford Street Rod, Blown 383 $48,500 Firm http://banners.wunderground.com/bann.../worcester.gif
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