2007 chevy hhr
 

Ok i i have a 2007 chevy hhr 2,2 liter all of the sudden when i put it it gear it would make jerking nose and a clocking sound and around 50 miles nit also vibrateand when yoyu let of gas it will not vibratemy son says these car have a limited slips diff in it that sends more to one wheel or the other according to the load he is thinking that whats wrong bad slip diff i was thing it is a bad cvc joint drivers i was thinkieither a bad cvc axle even throw no boots are cracking i was Ithing one of the knuckles in cvc could be locked up are bad spines either on cvc or bad slines where cvc axle goes it to trans also the car will vibrate at around 55 but if yiu get off gas it will quit vibrated

No limited slip. Sounds more like mounts to me.

we check motor mounts all looked good

Say WHAT ?
Sorry. Always willing to try and help. But I can't make any sense out of that post.

Cv axles are toast, while you’re at it replace the hubs.

i have a 2007 chevy hhr 2.2 auto trans when i put it reverse or drive it will jerk and make a popping sound also when i am driving the car vibrates at about 55 mph and if i let off gas it will stop vibrating's could it be a bad cvc axle are bad splines on either the cvc axle or bad splines were it goes into trans?

When you put it in gear, it jerks and makes a popping sound. Is this before the vehicle starts moving, i.e. with the brake still applied?

Yes before vehicle starts moving and my foot still on the brake

Yes, that does sound like it's the CV axles.

i took out driver side cvc axle and cranked it up and put in in gear with foot on brake and it did not pop are jerk so it was the cvc axle bad correct? The boots were intact no tears and had plenty of grease but that don,t mean it was good correct?