I'm pretty sure the dealers tell you that because they charge $175 for it.

 

I didn't give a mileage. I didn't say every other oil change. Every 50-100k (light use daily driven) would suffice. They are wear items, and the concern is that as wear increases so does the holding ability, when holding ability is reduced slippage and wear increase as does heat. In 50k it will be out of spec, adjusting it takes maybe 15 more minutes with a typical transmission service.
This is a 47re we sent our builder a while back. He sent us this picture to illustrate the importance of band adjustment. This transmission is at the 100k mark, not that other components weren't required. But a band adjustment would have certainly prevented the extreme level of wear seen.

I'm not trying to start a pissing match but I feel confident in my statement that not adjusting bands is the #1 cause of failure in these transmissions (internal, torque converter may as well have been scrapped prior to factory installation in my opinion )
I also feel that it's one of the most underperformed maintenence on these trucks! Nothing will be said to change my opinion.
Maybe I should also add that I'm particularly speaking to built trucks or trucks that tow heavy/plow snow. A factory daily driver likely will never be out of adjustment prior to other failures.
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im not trying to egg one on either, however it would be hard for you to argue that the flex band wear in the picture is anywhere close to normal. i WHOLE heartidy agree that if set-up inproperly from the get go that something like this can happen but not if properly assembled. in most worn transmissions you see discorloration and flaking of the friction material on this band, which is the typical overheating and wear. the probable moron that owned the tranny above had something WAY out of wack or decided the go pedal would make the tranny work right if he pushed on it harder.

one more note. the direct clutches and OD clutches are also wear items. however they must be installed correctly internally. the bands in these transmission MUST be adjusted after the assemblies are put together. that is why there is an external adjustment. Simply because it cant be put together without it.

 

Agree completely. And no doubt that was one of the worst I'd ever seen! I wouldn't ever expect to see one that bad. And in the majority of the cases the band's are not all that's neglected. In most cases the wear is minimal, however most heavily used and abused trucks will definitely show excessive wear! We charge the same for service with or without the band adjustment, and it's not a complicated process. Why wouldn't you check since your already there?

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agreed. my point is that its not absolutly necessary during a service. expecially when you have a DIY guy in the driveway that doesnt quite know what he is doing. way more harm than good can result.

also while i sit on the couch and ponder. the only way for the band in your picture to have been destroyed like that is that the owner continued to tighten the anchor bolt. as a band wears it gets loose and slipps not go rediculously tight and destroy a drum like the picture shows. i kinda hope you got a few more pennys from this guy just for being a tool. LOL

 

It's actually worse than that. It was quite the predicament all caused by trying to save a couple hundred bucks. But that doesn't change the fact that bands can wear. And in my opinion the easiest way to extend life of the transmission is to adjust them when servicing a transmission. If you don't have an in lb torque wrench and basic mechanical knowledge take it to a decent shop for sure. And you exactly right. It's not required every service but we service the transmissions at around 25k just for the sake of fluid quality!

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yeah once the bands start seeing metal ... its all over with ....

 

Thanks all for those precious comments! I am supposed to go pick-up the Cummins today, but first i just need to go "break my piggy" I will let you know how everything goes.

 

Hope u bring a big hammer ... And don't need it

 

Hi all, got the truck back from the tranny shop and wow! What a difference! I am driving a new truck Now, i just read in my owners manual that i should drive in "D" or 2nd in mountains roads or up & down hill roads and avoiding the "Over Drive"? Well i use those roads every day to go in town so should i leave the tranny in "D" and leave the "Over drive" push button on "OFF" while i reach the Highway to go to town and to work? I really want to "Baby" this tranny and take really good care of my "BIG" investment!!! Oh, and one more thing, my rear diff is acting a little funny when i take off slowly on a street corner? It is jerking! Somebody told me to change my Diff oil and that the special additive was gone from long usage? I have a "Limited SLip" Diff. Can i hurt my Diff by driving it any longer? Thanks all.