04 passat downshifts hard

heyarn

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#1
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MAKE:vw
MODEL:pasat
YEAR:2004
MILES:129,
ENGINE:1.8
DESCRIBE ISSUE....after its warmed up, it downshifts hard at 30mph when coasting or braking , feels like the converter is locking up, also when i put it in reverse it bangs into gear, also like the converter is lock up
 

kev2

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#2
I am not much help with VW but-
first suggestion - scan for codes even if light is out. Post all codes.
Fluid check - sometimes easier said than done.

And hopefully our trans guru will add some specific steps to take -
 

billr

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#3
Use live-data to look at line pressure commanded, TCC commands, and TCC slip; see what is going on. If no joy from that, then you can use a mechanical gauge to compare "commanded" LP to what is actually being set. Yeah, I hope BP has a simpler solution...