[Fulcrum525]

350SDL with a 300SDL engine

This came out of nowhere yesterday. We did an oil change and a light hosing down of the engine (With degreaser) I didn't drive it until this mourning.

Everything works fine from a standstill until the first shift of the transmission. From there on out there isn't much power and it won't shift again until I reach much higher RPM (above 3000). Cruising at around 40 then pushing it does nothing, slow acceleration at first but eventually the rpms will surge up to 3500-4000 but still no power.

We're stumped, please tell me that someone here knows whats going on.