I stand corrected, rgrinder, thank you, but read on.

One more thing that will make an engine, transmission, and differential last much, much longer is to add a magnetic drain plug. What happens in most transmissions and differentials is they never get the lube changed and the metal wear in the lube oil looks like the metal flake in paint. This metal flake is being run through your bearings and gear mesh surfaces and causes a lot of unneeded wear. The magnet traps a lot of these metal flakes.

I highly recommend changing the lube oil every year in transmissions and differentials and cleaning off the magnets. But, I will still keep on using heavy lube oil in MY transmissions and differentials. I got over 300,000 miles from my trans and rear end in my first 1200 and never had any problems with either unit. I did go in once and put shims into the pinion and ring gears to take out some minor backlash.

At my uncles scrap yard, I have seen too many differentials go out in Subaru's and I always thought that they were from using too thin of lube. I may be wrong and Subaru's just have weak diff units.


Mareo