my passenger side cv started clunking so i crawled under it and the boot was torn and there was no grease in there. do i have to open up the diff to get the cv out

Most of the time yes, it's held in with a c-clip inside the diff. Which car?

85 300d. thank you i didnt want to do any unneccesary work

It depends if you have the Homokenetic or Annular axles.

The Annular has an axle stubb that fits into the Diff., and on then about 6 bolts that bolts the axle to the stubb. with this type, the Diff does not have to be opened up. That is if the replacement axle is an Annular.

If the only axle you can locate it a Homokenetic, then the Diff. has to be gone into.

Look in the DIY Articles, under W123 rear axle replacement by DMORRISON.
The axles he is replacing are Homo. and the axles he installed are Annular.

Charlie

__________________
there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works