The question with the trans oil is all in what year the trans is, if it's prior to I think 86 or maybe 84 it will need 70w gear oil because of the internals now anything later because they changed the internals I think it was brass synchros it was the change was is where you will use ATF fluid Mercon fluid etc. I put ATF in my trans thinking they were all the same until I did some research but it's a pos trans so it don't matter to me but for you definitely find out the year of the trans and dont go by model year because my po put an 84 trans in my 91