I just switched to synthetic oil for my engine and it seems<br>a lot quieter at first start in the morning, anyone else notice this? No idea what was in it before, it came with fresh oil when I bought it. I am using Delo 400 Synthetic 5W-40, I got it for $15.57<br>per gallon, $50 plus change for 3 gallons, it could probably be found cheaper with a little shopping around.<br>Next is synthetic for the rearends and 5 speed, Amsoil, got any suggestions for a synthetic ATF for the T-Case?<br>Thanks<br>Robert

 

I'd look into using Red Line MT90 for the transmission. It's a 75W-90 GL-4 synthetic lube, the same rating as the factory fill Castrol Syntorq LT, but less expensive. GL-4 lubes usually contain 1/2 the extreme pressure/anti-wear additives sulfur and phosphorus, which makes them more friendly to the yellow metals, and provides &quot;traction&quot; for the synchros to work effectively, over one that's GL-5 rated. I know Mobil 1 does not recommend their synthetic 75W-90 gear lube be used in transmissions, because it's rated GL-5.<br><br>T-case, Mobil 1 synthetic ATF, $4.99 a quart at AutoZone.

 

Mine uses Amsoil from front to back. I got no complaints. ;D<br><br>Chris

 

I noted a couple of weeks ago when I went to synthetic that my truck seems quieter at road speed more so than at start up. Mileage is up, too. ;D

 

My engine was a lot quieter on the interior after switching to Redline. It also seems to just run a lot better. I even got a little more boost now! I have Redline in the engine, trans and trans case, and mobil 1 in the diffs. Very happy all around.<br><br>Hohn