WD DCM code - Which letters matter?

[gbulger]

I am swapping heads on a WD400BB-60DGA0. Patient DCM was HSBAHV2AH and doner was DSBHNV2CH. No luck. I am told different stories about which letters must match.

Any advice would be appreciated.

(or perhaps I have to spend a lot more time jigging the top cover?)

Thanks
GB

[HeadCrash]

Ummm this question has been asked million times, search this forum. If too lazy contact BlackST he will explain to you in more details.

[dobrevjetser]

I hope BlackST will not be spammed now with requests for explanation ...

[N.C.]

The short answer is simple:
It is different on the most of families/modells.
The lenght is different too.