95 Accord, speedometer not working right
 

it's a 95 accord, 170,000 miles, 4 cyl automatic. I ran over a big
chunk of hard snow/ice about a week ago. the speedo malfunctioned for
a while and then seemed normal for about a week. yesterday it
started not going up over 20 mph and shows 20 mph until the ingition
is turned off. the odometers aren't going up any more either. other
than that it seems to start and run fine.

a pal in the ins. business said it was trans related. before i take
it to a trans place is there anything i could eyeball and maybe
reattach or jiggle myself? any help will be greatly appreciated.