This is my first post in the development section.
First, go to market and download OTA Rootkeeper
Second, open the app, Select Create SU Backup.
Third, Select Temp UnRoot(with backup)
Fourth, uninstall Superuser, if you have superuser elite uninstall it also! and uninstall OTA Rootkeeper(dont worry it will not delete UR Backup!)
Fifth, Download and install the OTA.
After it is done and reboot, do a power cycle.
and the last step, go to market, install superuser and ota rootkeeper.
Launch OTA Rootkeeper and Select RestoreRoot, accept the superuser permission, and reboot!
AND ur back with rooted 2.3.6!
Alternate method! This is Jim's method(Thanks jim for this other way)
To do the 4ever root hack do the following:
1) open root explorer or ew file manager etc...
go to /system/bin
find the file named mount_ext3.sh
touch and hold the file name until the menu appears, go to open in text editor.
Add the following line to the VERY bottom of the file, after the fi
chmod 4755 /system/bin/su
chmod 4755 /system/xbin/su
chmod 644 /system/app/Superuser.apk
2) SAVE!!!! the file.
3) Do the OTA update.
4) You should still have root after the update, now.
Enjoy, Hope this helps!