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Old 02-04-2003, 01:33 AM
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Join Date: May 2001
Posts: 161
Harsh downshift at slow speeds accelerating

300E 87'
I have experienced this for about 3 years, sometimes more than at other times. I saw an article in my Alldata CD for my car which offers some hope. My car does this exact symtoms as the complaint (BELOW) except 3-2 and 4-2 downshifts are the jerky ones.

The complaint: , quoting
"Harsh 3-1 or 2-1 dowhshift when driving slowly at 12-15mph, and abrupt 80% + throttle application."

The Remedy:
"According to ALLDATA is to install a modified Plate-type check valve with throttle (13 in the illustration) , P/N 124 270 02 89, install into shift valve housing of valve body. (the modified/improved plate valve is red in color.)"

Does anyone know if this is a DIY thing? Does the valve body have to come off? If so is it going to be more complicated to remove and install than I want to (first time) tackle?? Are gaskets required if the valve body has to come off?

I'm hoping someone has tried this since it was listed in the ALLDATA. tech bulletins

Another bulletins said that the "bands" had to be adjusted after high mileage and wear made too much clearance. But this requires some special tools and looked really complicated. ??

Any help or info is appreciated.

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Old 02-04-2003, 06:24 AM
engatwork's Avatar
Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 11,246
I have pulled the valve body from the 300D a time or two and I consider it a diy'er type of job. Just make sure everything goes back together the way it comes off. You will want to replace the filter and pan gasket when you do this job.
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