Anyone here a shade-tree/Hobbyist Mechanic?

[68Charger]

The only thing I wouldn't be Warm and fuzzy with is the 4L60E.

depending on the year, the newer ones call for Dextron VI (don't recall the year they started), it's a 100k+ mi fluid synthetic, and pricey... check your owner's manual for change intervals!

I've done the 4L60E... it's not too hard, but with no drain plug, it's common to splash ATF all over when the pan comes loose

[zteknik]

depending on the year, the newer ones call for Dextron VI (don't recall the year they started), it's a 100k+ mi fluid synthetic, and pricey... check your owner's manual for change intervals!

I've done the 4L60E... it's not too hard, but with no drain plug, it's common to splash ATF all over when the pan comes loose

they told me in tech school that it was SOP to wear the fluid while draining the pan

[jmg8550]

As far as the differentials go, I would personally use synthetic gear oil in them. I have seen far too many differential failures at the dealership from using conventional oils. Especially the front diff. The transmission should be power flushed. Dropping the trans pan and changing the fluid and filter only gets about 1/3 of the old stuff out. The transfer case may need a special fluid from the dealer if it is auto 4X4. Synthetic is not necessary in the trans or transfer case. You will spend a little more for the gear oil, but it is well worth it. Less wear and tear on the bearings, as those are the weak parts. Just my opinion and advise. I worked at a GMC dealership from 2003 to 2005 and saw alot of the problems in those years.