TrueBlue

That part I understand, that the dealer can do it. But I'm not understanding why updates that were available to the truck since it left the factory, or the dealership originally, would not still be available to it without dealer intervention. I'm thinking along the lines of recalls. They stay available until they are completed, regardless of whether they are in warranty or not, or in the hands of the original owner or not. Why not updates as well, especially since some of those can be safety related also?

If it's not put to normal and right, it won't be from lack of trying on your part. Or because you didn't spend the money that needed to be spent. You're committed and thorough for sure.

Just out of curiosity, why would there be no available updates if in fact updates had previously been available but not installed? Does a vehicle have to be under warranty to receive such updates?

Scanners, much like HP printers, should be sold for much less considering how much they charge to keep them in updates or ink respectively. Can't fault the quality of each but it's hard for some to pay the tolls.

Lots of info in this thread I was not aware of. How long has Mann-Hummel been in business? It's getting harder and harder to not do business with China. Guess my next stop will be the dealership to pick up a few of the new, "improved" filters for my 5.3. If it's gonna fail I'd rather it be with a GM-approved filter.

Personally, I've been running Wix filters for a very long time. No adverse affects. That I'm aware of. Someone said "used to". What has changed?

Wix makes good filters.

Interesting. There's always WIX WL10255XP though.

Bi-directional scanner? How about a Thinkcar TK689? Bluetooth, and free updates for life...

Given your chart GB, and the anecdotes we've seen here of what I think were 10L80 transmissions running consistently at 200 degrees and higher under light-ish towing loads I'm very pleased that mine stays around 145, even in high ambient temps. Of course the proof will be in the pudding when I actually pull one of my trailers, but at this point it appears that I won't see temps in the "dangerous" ranges for my tranny.

Thanks for the detailed explanation. I'm old enough to remember the old vehicles with transmissions that were either not cooled at all, or run through the bottom of the radiator. Sometimes it appears that much like my latter days in my job as a computer analyst in a fortune 500 company, insofar as our vehicles are concerned testing has moved over into the production environment. And we are the testers

Thanks, so being a different beast altogether, anyone know what the "optimal" temp is for the 10L80/90 for proper shifting?

I have the 10L80 gas transmission. It rides at 145 or just a tad higher in the heat. Haven't towed with it yet. Both of my trailers are lightweight, 900 - 1500lbs empty, so I won't be pulling a whole lot of weight with it when I do pull them. But given this statement, "Ideal temps for automatic transmissions to do their job the best is 175-220F", what does that mean for our gasser trannies? Are they not operating at ideal temp? Or do those temps only apply to the 10L90 on the HD trucks?

No pictures. Possible that the brand could make a difference, though I've always thought the numbers tell the story. All I know for sure is that his tires sure looked good.

I would take it to a very able mechanic/technician that you trust and have them plug a good reader into it, as well as evaluate it front to back, top to bottom. Check Carfax. Neither is a guarantee but it would be good to learn everything you can about its prior life. Also, for that amount of money you can probably buy new, and if possible pick up an extended warranty. Then you'll be warranteed for several years and/or many miles.