Rattle/grinding noise at 25-35 mph, mechanic told me AFM and lifters need to be changed.

[iboughtatahoe23]

Or tow/haul mode should disable it.

Can you use this all the time?

 

[Dustin Jackson]

@iboughtatahoe23 You should be able to use M5 or tow haul mode for the time being until you can properly address the situation

 

[wjburken]

@iboughtatahoe23 You should be able to use M5 or tow haul mode for the time being until you can properly address the situation

Tow/Haul does not keep you out of V4

FYI - Tow/Haul mode does not disable AFM.

 

[Dustin Jackson]

M5 mode it is then lol

 

[iboughtatahoe23]

Tow/Haul does not keep you out of V4

I had it in “m5” and it didn’t go into v4 at all and it didn’t make that grinding noise the whole ride…seems to be working for me

 

[iboughtatahoe23]

M5 mode it is then lol

Works for me ‍

 

[iboughtatahoe23]

Tow/Haul does not keep you out of V4

Nooo not the button, shifting into manual gear 5 is what I meant haha

 

[iboughtatahoe23]

So far, my experience with driving a manual gear five is good, feels the same as driving and drive to be honest, but I’m sure I never even get fast enough to use that sixth gear.

Am I opinion I feel like it drives way better and manual

 

[iboughtatahoe23]

Can anyone explain how the manual gears work exactly? And how fast I can go using manual up to gear 5? @NickTransmissions ?

 

[NickTransmissions]

Can anyone explain how the manual gears work exactly? And how fast I can go using manual up to gear 5? @NickTransmissions ?

Manual mode enables you to determine the shift timing vs having the computer do it.

Unfortunately, I don't own a 6L80 equipped vehicle (yet - will be buying one in the fall) I can't speak to the particulars as to what you can and can't do in light of your current symptom patterns, etc...Speed-wise, it shouldn't be any different than acceleration rate you have in auto-shift mode. Will tag @wjburken for his input...