Upgrading to 3.73's

[drumset5994]

So i'd like to increase my stock 3.08's to 3.73's...

 

...let me rephrase this...

 

...i would like to PAY someone to do it

 

 

I know i gotta buy the ring and pinion gear...that i can do on ebay...

 

but isnt there a bit about reprogramming the computer to recognize the new gears?

 

Just curious, because i dont know of anyone who's had a 4.3L V6 and upgraded that high.

[Pureiron]

sure wish someone would give you an answer. I have 3.42 in mine, and I want to do the same thing

[drumset5994]

3.08's are kinda nice...but its more balls than torque, if you know what i mean.

 

I'd like to have that quick response higher gears gives. My dad's with 3.42's really takes off rather quick.

[desrtrat]

sure wish someone would give you an answer. I have 3.42 in mine, and I want to do the same thing 

 

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check with the local wrecking yards, 3.73/4.10 are a dime a dozen. it would be cheeper then a rebuildind parts/labor.

 

good luck

 

[chakis24]

sure wish someone would give you an answer. I have 3.42 in mine, and I want to do the same thing 

 

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i wanna do the same with mine, too- i might go 4.10 though

[Pureiron]

Thansk for the info

[Wingnut]

sure wish someone would give you an answer. I have 3.42 in mine, and I want to do the same thing 

 

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check with the local wrecking yards, 3.73/4.10 are a dime a dozen. it would be cheeper then a rebuildind parts/labor.

 

good luck

 

 

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I agree...Probably the easiest way to do it.

 

Go to the salvage, and take the entire rear end. That swap could be done in the driveway in a couple of hours with some pretty basic tools and a LOT of beer.

[C & A s Dad]

You have gotten some good avice. If I am not mistaken, to go from a 3.08 to a 3.73 or 4.10 you would need an entire carrier unit. I believe the carrier changes in thickness once you leave the 3.08 or 3.42. I would agree, swap the entire rear end.

 

Chakis24, if you are towing any decent weight (6,000 lbs or more)with your truck you would really like the 4.10s. I have them in my Yukon XL and tow a 6,500 lb camper and it is a "tuggin machine". I am also a firm believer that you will see little to no change in MPG unless you are driving primarily all highway above 70 MPH. Some even say they get better MPG with 4.10s because the engine is running in it's "sweet spot" and is more efficient. I am averaging 18.7 MPG with most of my driving on rural roads with very little true highway driving. I get about 12 MPG when towing.

[drumset5994]

Yeah, but i just had this done on my current rear end...

 

-New Rear Rotors and Pads

-New Emergency Brake Setup

-New Dust Covers

-New Axle Seals

-New Differential Cover (mine was rotting through)

-New Rear End Fluid

 

 

Wouldnt it just be easier for me to buy 3.73's with the carrier, like on ebay somewhere?

[C & A s Dad]

Everything you just mentioned will transfer right over to another rear end, with the exception of the seals and fluid. You would not want to reuse them.

 

The other thing to consider is who you have actually swap the gears if you go this direction. Setting up the preload, clearance, depth etc in a ring and pinion is not for the average guy. There are many Techs that will not touch this due to the knowledge and skill needed to do it properly. Don't get me wrong, it can be done and there are plenty of Prof Techs that can do it, just be careful who you use.

[drumset5994]

I had a hell of a brainstorm.

 

I could find a new rear axle with 3.73's...rip it out...take it my average joe mechanic and say "swap in, swap out" (i know the guy...i trust him) and all he'll charge is labor. Sweet deal!!