Changing the gears in my suburban
I have decided to change the gears in my suburban (2008 5.3L 4sp auto), but not sure how much of a change to make. I currently have 3.73 gears, and was thinking 4.30 because 4.10 doesn't change much,...
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The engine will be working less with the 4.30 gears. You will be able to tow in OD and when it does kick down it will still be the same rpm spread. The gear change will make the truck more efficient when towing.
I went from 3.73 to 4.30 in my X and it was the best thing I could’ve done. I kind of wish i went to 4.56 sometimes. At 67mph in OD I’m at 2300rpm, if it kicks into 3rd at the same speed I’m at 3k rpm.
The LS motor will have no problem if and when it has to spin at higher rpm. Hell my X routinely sees 4k rpm at 60 on the big mountains out west and in the east.
I went from 3.73 to 4.30 in my X and it was the best thing I could’ve done. I kind of wish i went to 4.56 sometimes. At 67mph in OD I’m at 2300rpm, if it kicks into 3rd at the same speed I’m at 3k rpm.
The LS motor will have no problem if and when it has to spin at higher rpm. Hell my X routinely sees 4k rpm at 60 on the big mountains out west and in the east.
