Animating blobs (particles or metaball?)

Hi I’m trying to make a JellyCar (in Blender 2.9) where the back wiggles and breaks off, I tried using metaballs but I can’t get them to be viscous enough… any ideas what I could use instead (or if there’s a way to tweak ‘viscosity’?) I’m somewhere between beginner and intermediate I’d really appreciate some advice!

I did a test too