virgils4.85spd

I want a locker and gears. should i use 373 or 411 thanks

Mr. Sandog

You gotta give us more info.

1) What type of truck do you have - motor, mods, gears, etc.?
2) Do you want off the line performance, good gas mileage or both?
3) What is your ratio of freeway/stop-and-go driving?
4) What is your tire diameter?
5) Do you want to race your truck?

JimS

My truck is for crusing only... not a daily driver and almost never goes on the highway for any distances. I want killer torque low end power. I'm ordering 4.56 gears w/a Detroit Locker Trutrack this week. The charts show that with the od auto it will cruise at about 2600 at 75 mph. That's a little high but I can live with it given the increased accerlation. Check out www.ringpinion.com to calculate engine speed at any given mph. You just need to know your tire heighth.

trever1t

iTrader: (14)

I'm thinking of going to 3.73 from 3.42 with Posi. Seems like a good combo for street on 285/70/17's.
Anyone running this gear/wheel?

Rhino79

iTrader: (7)

With a 5-speed, I think that 3.73's will be fine.

Scrapin'4.8

iTrader: (3)

Virgil, what's the code say in your glove compartment? i thought i had 3.42's til i looked and i have 3.73's. so just be sure before u wanna change. But from what i hear, the 3.73s in a 5-speed r like 4.10's in an auto. But there is a guy on here that put the 4.10's in his 5-speed and he said it was well worth it b/c of the 3rd gear pull.

TurboGibbs

iTrader: (6)

When you start putting down a lot of power the lower gear will cause 1st to be worthless. As soon as I go to 1/2 throttle or so I'm on the rev limiter and that is with my 275/55-20's. I have 3.73's and am going to swap in some 3.23's in the next couple of weeks. I had 3.42's in my 95 5speed with a 383 and I went to 2.73's and it was the best mod I had ever done to the truck. First gear actually has a purpose now. The tires on it are 28" tall but my 05' 20" are 31.5".
The 4L60's have a 3.07 1st gear and the late model tr-3450 5 speeds have a 3.82 first. To get the same final drive with the 5 speed as the 4L60 would have with 4.10's you would have to put 3.30. That multiplication factor makes a huge difference with the 1st gear so low. Now if you have a NV3500 your 1st gear is a 4.02:1 and that is just nasty low with some power.

Deckhand

iTrader: (1)

If you cant decide between 3.73s or 4.10s.... go with 3.90s

Rhino79

iTrader: (7)

That's exactly what I was thinking, I would not want to use more than 3 gears in the quarter mile.

5.3AlmnBlk

i got almost similiar kind of lol i run 4.10s and 265/70/17 it gives me off the line, go and stop and highway power i was thinking of getting a truck with 3.42s but i was the heck with it