Gear Ratios?

D

dieseljunkie

Wasted Wages
Joined
Dec 16, 2007
Messages
1,068
How do I figure the gear ratios for pulling with a 5600 6-spd & 3.54 axel gears? Im lookin for 4th & 5th low range(2.72 transfer case) and 2nd Hi range. just curious.
 
Yep lookin like it would take 4.11s to run 5th @11.81. I guess #2 hi is gunna be my baby @ 11.97. that sound right?
 
WTF????? Are you talking about 1/4 mile???? This is the "Sled Pulling" forum.

-Tom
 
3.54 X 2.72 X 1.39 = 13.3840 (4th gear)

3.54 X 2.72 X 1.00 = 9.6288 (5th gear)



-Tom
 
Tcolesanti said:
WTF????? Are you talking about 1/4 mile???? This is the "Sled Pulling" forum.

-Tom
Click to expand...

I know what forum im in! i went to some stupid website that gave me those #. i now realize i had the wrong trans gears. ( @ ) means "at" it is not a drag racing term although it is frequently used there. i meant at 11.97 : 1( which is obviously incorrect) So smart man can i please know what 2nd gear in a NV5600 is?
 
5TH low and 3.54s will make you hope like a po-go stick. plus i don't think you will be able to keep the turbo lit. i would go with 4TH low. but it depends on the track the sled and your driving
 
Thanks fellas, that all I needed to know. Im glad I could learn something new here. My truck has way more power than last year & im just tryin to figure it out. Thanks again.
 
It also makes a difference on your gear selection on your tires your running stock hight or 33,35 Just something else to think about.
 
i use to run 4th/low all the time with 33's and 3.54's but this year its too low for me, i go down the track way above the power curve and the truck is just revving too high. switched to 2nd gear high range and picked up 17' same track same sled same day, and the truck just sounded and felt better with the rpms a little lower and loading the engine better.
 
Only issue with using high range on the 6 speeds, is any kind of power and a bity track your looking at tranny problems.
 
You are putting a lot more torque on the main shaft in the tranny. When your on the low side of the transfer case you have 2.72 less torque on the shaft.
 
2wpuller said:
It also makes a difference on your gear selection on your tires your running stock hight or 33,35 Just something else to think about.
Click to expand...

So do you use the factory tire specs when calculating bigger or smaller tires for the ratio ??? (Nv5600 6th gear with 3.73= 2.72 final) say they had 31 in tires from the factory I added 33s so that comes out to a 2.55 final this correct ?
 
Your final drive ratio will be the same, per the calculators most people use, but the ground speed will be different.
 
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