Those with 35's, 4.56, and auto trans, please read:
 

I need to know what your rpm's are. If you could tell me what rpm's you are running when in:
-3rd gear @ 40, 50, 55, 60 mph
-Overdrive @ 50, 55, 60, 65, 70, 75 mph

Thanks a bunch

RE: Those with 35's, 4.56, and auto trans, please read:
 

You'd probably get alot more answers over on pavementsucks.com

I don't really know that anyone on this board has changed their gears other than nhbill and he runs 5.13s.

RE: Those with 35's, 4.56, and auto trans, please read:
 

Ya, i'm in the process of posting the same question in a few other places, including PS. I'll have my tach installed by next week, so i'll be able to do some comparisons with what people tell me.

RE: Those with 35's, 4.56, and auto trans, please read:
 

at 70 mph 2200 rpm....dont tell any one...;)

RE: Those with 35's, 4.56, and auto trans, please read:
 

That's with 3.55's though right? Or did you get your gears installed?

RE: Those with 35's, 4.56, and auto trans, please read:
 

wrong , 3:55 at 70 pulling about 1500 rpm , over drive with the 4.56 pulling 2200 rpm . buttttt my speedo is off now need to get the gear for the speedo .. be intresting to see what others say , then i can judge better what my speed is to my rpm.. of course i could be doing 75-77 mph to ?? so now the question is not only rpm to gear but if your speedo is correct to... hmmm

RE: Those with 35's, 4.56, and auto trans, please read:
 

Yes, my speedo is correct. I had a dealership program for my tires. I don't have to adjust my speedo for gear, only for tire size.

So when did you get the 4.56's installed? How do you like them?

RE: Those with 35's, 4.56, and auto trans, please read:
 

Well silver...I could go out and get you what I have, only problem is that I have the 5 speed. Do the two run different output ratios?

RE: Those with 35's, 4.56, and auto trans, please read:
 

Your manual trans is 1:1, the automatic is something like .69:1 with the torque converter.

RE: Those with 35's, 4.56, and auto trans, please read:
 

I was talking the to TheForce for a while and he thought I had 4.56s as well. Usually when I drive on the highway at 65mph, the truck is at around 2200 rpms. At 70mph its at around 2300-2400 rpms. Does that add up. Damnit wish I just knew for sure.