well i was doin my 30k tune up early and everything was going good. changed plugs changed oil and filter, cleaned throttle body and air filter. but when i got to the rear end, i drained it, cleaned the magnet,and resealed with rtv high temp. now as i was fillin it up it was gettin dark and i got in a hurry, so come this morning i go to get everything ready for the front and it turns out i mixed a bottle of 75 90 with the 75 140 i put in the rear my question is do i need to pop it back off and redrain or can i let it ride for a week or two like that? Cause i really dont want to go through all of that again today and i need to go to work tomorrow..... please let it be ok!

 

i think its fine as is, for another 30k.
if you have LSD, did you add the 'LSD additive' ?

 

You should be fine.

 

no lsd but the synthetic i got had it already in there, so mixing the different wieghts isnt that big of a deal?

 

People mix different weights of oil occasionally. There is no problem with it.