Whats the best gear oil for trans,transfer,rear.
Posted: Mon Jun 25, 2012 6:26 pmhave a napa close buy but it seems hard to find the 90 weight the TM lube order states. Thanks.
90wt is fine.
Originally the trucks ran what is basically GL-1 (just about straight mineral oil with anti-foam additives). But now a days GL-5 is the easiest to find. Since there are no synchro's in the CCKW gear box you can safely run it there.