Could someone please explain to me how the gearbox knows when to shift and into what gear ? My car has always changed down into second gear if i kick down even up to 60 mph, which at that speed revs the nuts off the engine. I had always wondered if there was an adjustment that could be made to stop it changing into second at above 55 mph. However i have since had a full gearbox overhaul and now i have the complete opposite problem. My box will no longer select second at kickdown above 40 mph, it will only go down one gear into third. As my car produces great power in second between 40 to 60 mph, i want my box working properly. I took my car back to the garage that overhauled the box and he is not sure what going on. I have now fallen out with this guy and the problem remains.
Has anyone got any idea where i should try to look first. I am a fairly competent DIY'er, but have no experience with autos.

I must add that i can manually select any gear with no problems but that is not the point. I want everything to work as it should.
Sorry for the long post.
Thanks
Dave

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Sorry, it a 190 2.5-16 1991 euro.
thanks.
dave

A fourth to second down shift at 60mph is not normal; caused by a stuck valve in the valve body to have that down shift. Drive train shock load is the number one cause of transmission failure.


The Bowden cable controls shift timing, making the Cable shorter will hold a gear longer.

You have a
Chassis W201.035
Model 190 E 2.5-16

The transmission valve body may need to be cleaned.

Here is data specific to your transmission.

http://www.detali.ru/cat/oem_mb1.asp?TP=1&F=201035&M=102%2E990&GA=722%2E417&GM=717%2E404&CT=GA&Cat=08R&SID=27


Chassis W201.035 data
http://www.detali.ru/cat/oem_mb1.asp?TP=1&F=201035&VIN=

going back to my shifting down 2 gears at 60 mph problem, this has always been the case for all the years i have owned the car, my car changes from second in to third at just under 65 mph so i still want the box to drop 2 gears at 55 at the latest. since rebuild it wont drop 2 gears above 40 which takes me below my power band. I would say it was better before i had the work done.
About the valve body, would it not be normally taken out and checked when the box was stripped or is it a seperate unit ?

Where are you?
Generic location = nearest major city...