Have a 03 deville, 4t80e trans. put new right axle in due to old one spitting grease and also put new wheel bearing in to fix my abs light. Car has 78k. Drove home from work which is about 20 miles. Turned in and got home went to leave later and every gear was like neutral. Put old axle I'm and decided to run it while up in the air. Everything was fine. Put it down and moved little acted like maybe axle popped out. Rechecked and axles good. Fluid was just changed and filters, fluids full. No dtc's

Do I have a axle issue or trans issue. Another problem is when dipstick is out in park engine running the fluid will shoot out of the fill/dip stick hole, was thinking clogged line or vent, possibly pressure issue. Maybe its all related/

 

Did the speedometer register when this happened? IF the speedo is moving, but the car is not, you have a problem with at least one of the axles, or possibly the differential. Were you having any problems with the trans before changing the axle? If not, then I would have to suggest the issue is with the axle, or the installation.

 

trans was fine before and after the install of the axle, I took the new axle out and it was blown apart where the inside bearings are so I got a new axle from GM, put it in and the car moved but slipped very badly and made it 100 yards and no output at all. Believe an internal seal blew out because of it burping the fluid out of the dipstick. I found a used 4t80e on ebay with year warrenty with 42k miles for $600 obo. thinking thats the route im going to end up going