Hi,
Sounds like the rear oil springs are too heavy. Looking at the conversion chart.
Losi 37.5 oil to equivalent to AE 35.
I'm running on indoor astro, astro is laid on concert floor, with wood jumps.
Rear I'm running 30 ae oil (32.5 losi oil) 1.7 piston and 2.1lb spring.
I have no problems with jumps, running 17mm ride height.
(Track video:
https://www.youtube.com/watch?v=EYkHF9op5A4)
Let me know if you want full set-up sheet.
MiCk B. :-)