2006 6.0 oil drip at rear

[mark2890]

started with losing oil pressure at idle (purchased used). 107,000 miles. pulled motor rear galley plug had fell out. repaired plug. new cover seals and main seal. good pressure now but leaked worse at rear. pulled trans had installed rear main seal backwards!!!! used tool 303-770 . clean crank . lube outside edge w/ soapy water. still have small drip at starter and bellhousing. inspected cover well with trans out have seen broken/cracked cover, no evidence of that. oil has been dyed.nothing up high at rear . seems to be at rear cover. any ideas or help would be appreciated. Dont want to replace rear cover and still have leak. Thanks. Mark