hello, i am buying a 2008 5.3l 4wd crew cab silverado and i was on chevrolets website today and noticed they have a super-duty transmission upgrade available. i was wondering what exactly this upgrade is as it doesnt tell in the description. i was hoping it was a 4l80e upgrade but i doubt that is the case. i just would like to know if the upgrade will be worth the money, thanks.

 

oh and it is a 1500.

 

never heard of that one, interested to know as well.

 

Can't be a 6L80, that would make too much sense..........

 

I doubt its a 4L80 because not even the 2500 and 3500 have 4L80's anymore.. Have all been replaced with 6L80 and 6L90's... Probably just a 4L70 with a cooler....

 

4L60E/4L65E/4L70E is all they show available , The 4L65E is likley the heavy duty.

 

well i found out the super-duty transmission option is only available on the 6.0 so i am gonna see how much extra it will be with both of those options.

 

4l70e and 14 bolt rear end, rear disc brakes and some other stuff come with the
6.0l vmax

 

ok sweet, i was hoping it was the 4l70e, thanks dude.

 

Well the 4l70e the only difference is the input speed sensor, I have noted that this does not mean 5 pinion planets, I prefer the 65e