[Timbo114]

2011 GT2100
Hydro BDU-10
Meticulously maintained (by me, I'm 60 and well mechanically inclined)
299 hours
Condition is 9.85 / 10
48" Fab deck w/ mulch kit
Mows 1 acre on a slow grade - no winter work.

I just changed the Hydro fluid and filter
- CC 737-3025 Hydraulic Transmission Fluid @$5.95 Qt
- CC 923-3014 Filter @$11.
Purchased at local dealer who sold my the tractor (known the owner for over 20 years, highly reputable family business).

737-3025 fluid confirmed to be fine for my 2100.

I have a 2000 Series service manual - followed fluid change procedure 100%.

Here's my issue ..

FWD pedal is slow to return to neutral when I lift my foot, and tractor continues to roll fwd slowly on flat surface (road test on my street).
Reverse pedal function is 100%.
I used to get the "whiplash" brake if I lift off each pedal abruptly ...
I still get this in reverse, but it only happens in FWD AFTER I immediately engage and disengage the FWD pedal after lifting off REV.
I also get my old "whiplash" brake in FWD but only once , and immediately after lifting off REV.
Now if I continue driving forward, on and off the pedal ... THIS is when the FWD pedal is very slow to return to neutral when I lift my foot off.
And my old "whiplash" brake does not happen after the 1st let off during my on/off FWD pedal testing.

What am I missing?

This is NOT my 1st fluid / filter change - this has never happened before.

Thanks for any advice.