just did a rebuild of an 01e s4 b5 that had a bad synchro hub and synchros on first and second gear

after rebuild it shifts fine but had excessive movement of Engine and transmission resulting in noise

this was corrected with new mounts and adjusted exhaust clearance as there is a big aftermarket exhaust with very limited clearance


after that did testdrive and what it seems like when doing hard pulls 1-3 i loose all gears until i let of the throttle and pause for some 20 seconds or so .. after that it shifts fine again

and it is easy to repeat this procedure


is this due to some air in the system ? or should i look elsewhere like replace cluch hose etc?



thanks