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[Peti]

There's this plastic ring I found broken into 3 pieces when removing the SMALLER sump of the automatic transmission :

Plastic ring :



Suppose I can buy a new one.
But then I just can't imagine WHERE does it come from.
Can anyone show me on this picture ?

Sump:

[Jimbob]

thats the dreaded thrust washer - there is a post on replacing it in the maintenance section. check the index in my sig. 

you will need new gaskets, fluid and an uprated brass thrust washer.
box bits can be obtained from JPAT, fluid from opie oils.

[Peti]

Well, this looks everything but easy!
I thought I just buy a new one and click it to its place using 2 fingers 

[Jimbob]

its not hard.....once the box is off the car.

[feeutfo]

There's a guy round here will do that sort of job for £200 plus parts.

Ime you need a local garage with auto box experience. Not an auto box only specialist as such, they tend to take the pesh a little.

It can be done on the drive though, apparently.  :-/

[Peti]

Lately,when leaving the garage(i.e. when everything was cold) , it took the transmission unit quite a few meters to change from gear 1 to gear 2.

Do you think that plastic ring is to blame for that ?

Do I take a big risk if I do NOT replace it for a while ?

[Marks DTM Calib]

Standard operation, it does that when cold to get the engine to warm up a little quicker.

[Peti]

That sounds fine, but do you think it is a big risk NOT to replace that plastic ring immediately ?