nv4500 vs nv5600

G-dubs

G-dubs

Thanks to Bank of Jessica
Joined
Feb 26, 2008
Messages
249
So I've read a lot about the nv4500 holding up in the sled pulling world. How is the nv5600? Just as strong, stonger, not as stong? I'm not worried about gear ratios, but which one can handle more hooks? Brute strength.
 
the nv-5600 is stronger.. if you have the gears to run it in 5th, i doubt you will break it..
 
the thing that stinks with a 5600 is the price. they are way more expensive than a 4500.
 
If you was going to do nothing but pulling i would go with the 5600 because you have more gear selections. The only thing that sucks about the 5600 is when working on them, just to replace an input shaft you have to pull the entire case. Either way the 5600 and 4500 both have proven them selfs in sled pulling
 
Depending on your power range, they both hold up the same i think. A NV4500 you will need a bigger input shaft, but that should be common kknowledge anyways. Most NV5600's already have the bigger input shaft. Both have a weak link in 2nd gear though. NV4500's usuall ybreak the gear, where the NV5600 usually break the main shaft at the transfer case. With the NV4500 being smaller and less rotating parts, I would go with it on a dedicated puller. Although with the gearing it has, you would need to go with a 4.88 or 5.13 axel gears and run 4th low or 2nd high to stay competitive. 4.10's work well with the NV4500 in 2nd high aswell, but you risk the chance of breaking it. For a puller/daily driver, the NV5600 would be best because of gearing, but you will still want to run 4th low. 3.54 seems to work best with the NV5600 if you always run 4th low. With 4.10's 2nd high or 5th low seems to be the ticket, but again you risk breaking the mainshaft in 2nd high, but not as often it seems with a faster axle gear.
 
Dont forget about the weight factor. Id rather have the 45 and put the extra lbs where I choose
 
Personally after having a 5600 in my truck and running my brothers old pull truck with the 5speed...if you have the revs in the motor the NV4500 is the way to go. Cheaper, just as strong and more parts available. One thing though that people seem to forget is that by going with the 5600 off the bat you don't have to fork over the extra $$$ for the big imput shaft for the 5-speed...brings the price closer to the same for the tranys if you look at it that way.

Ryan
 
wait till you break and input shaft in the 5600 then which one is cheaper to fix, the cost issue between the 2 is the reason i stick with the 4500.
 
The NV4500 is cheaper to rebuilt.

ValAir1, what type of tracks do you pull on and what kind of RPM do you carry down the track?
 
well texas tracks are pretty hard, i leave at 4k in 4th, honestly i dunno what i'm turning all the way down the track, but i been busting the tires loose most the way down, i'm gonna try some different tires and different pressures, we will se what happens.I may have to change up again with the gearing.
 
Thats a crazy final with the gear your running now. Most trucks around here can't use that tall of a gear because of the tracks. 2.5/2.6 trucks usually don't have the power once they get hooked up and the 2.8/3.0 trucks eitehr fall on thier face or just blow the tires completely off. There are a few 4.10 trucks using 4th low with good results, but I've not seen any 3.54 trucks try it successfully.
 
4Th low (direct) and 3.54 give a 9.62 final. with a 4500. Low 4th with 4.10 and a 4500 give a 11.11. According to schieds, the 2.8 class runs around a 16 final. Low 3rd with 3.55 and a 4500 is a 16.07 final which i think is alittle to slow. Brad said to run it with some rpms because i called him about swapping a 5600 in my truck cause low 4th would be a 13.22 final.
 
i'm building a new motor, with more power, i have broken alot of parts this year. as far as sucessfull goes, well i aint won yet. other than a couple of brush pulls. LOL but i'm learning more and more every time i hook.
 
Heh!! You are about to learn that more power and torque+4th low+3:54s+ plus a good track= broken parts every hook!!
Years ago I used to run that gear on limestone tracks with small tires and twin turbos and it still would pull it down to 3200 or less-
 
I kind of figured that, probably time for some new gears, I already have a lincoln locker on the rear lol,
 
Most 2.8 trucks I've seen run a 5.13 or sometimes a 4.88 gear with the NV4500. This being around a 13.8 final gear. From my experiences, around here with the lighter sleds and hard biting tracks a 13.0-14.0 final is the best gear to have no matter if its a 2.5, 2.6, 2.8, or a street twins class.
 
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