Questions about 3:73 gear swap 05 Tahoe 5.3

[CookieMonster401]

So some of my buddies told me to get the 3:73 swap and I've been thinking bout it. But I wanna know if that's a good swap for me trying to build a race truck and also trying to daily her as of now, so in the middle of speed and mpg. And also, if I just do the gears right now and wait a few months to do a locked diff would it have any extra risk of breaking If I just pop the swap in or would it be fine? How much faster would it make my truck like acceleration and torque, like what is the difference from stock. And I also don't know who the reliable manufacturers are for these type of items. Help please I'm exited to start building a race Tahoe

 

[bottomline2000]

What's your current setup gear wise and what do you plan to do with the truck if you building a "race" truck I would think you would be looking at least at 4.10 up to 4.56 gears. I would do the gear swap with a locker at the same time. Why pay labor twice? Tire size is also going to impact gearing. Transmission too..what's your goal?

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[CookieMonster401]

Thinking about getting up too a 6.2 with the 85e transmission. I'm not sure on my tire size yet but my stock gears just went out so I figured just get a swap while the truck needs repair anyway. And I'm on stock gears right now, probably 3,73 but I haven't checked since my truck at the shop


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[Scottydoggs]

it this point ditch the 10 bolt rear too

10 bolt rears are kinda weak. not many race with them.

 

[bottomline2000]

Thinking about getting up too a 6.2 with the 85e transmission. I'm not sure on my tire size yet but my stock gears just went out so I figured just get a swap while the truck needs repair anyway. And I'm on stock gears right now, probably 3,73 but I haven't checked since my truck at the shop


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The 85e is geared differently. 1st gear is the same as 2nd in the 60 I believe. The o/d gear is shorter so you turn higher rpm. Something else to think about. If you really wanna race the 80 is still the way to go..

There's a guy running 9's with a 10 bolt. It can be built up with a better locker, stronger axles and cover and some bracing.. but I would think a 14 bolt would be better. I just haven't seen anyone do it to a tahoe.

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[CookieMonster401]

What's a good locking diff to buy and like how do I buy it. Don't know much abt that either. I have to make my decision today on gears so I'm desperately looking for a good swap lol. I might go with 4.10 now. Idk lol


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[CookieMonster401]

And also. Anyone know of a reliable company to buy from?


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[bottomline2000]

Detroit tru trac seems to be the way to go. Made by eaton. You can buy from Summit, Jegs or one company I prefer is drivetrain specialist.com. Really helpful tech line and helped me spec a yoke for my Trans swap. Also talked to them about the gear/posi swap and they know their stuff.

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[CookieMonster401]

Detroit tru trac seems to be the way to go. Made by eaton. You can buy from Summit, Jegs or one company I prefer is drivetrain specialist.com. Really helpful tech line and helped me spec a yoke for my Trans swap. Also talked to them about the gear/posi swap and they know their stuff.

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Alright thank you


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[4WDTRK]

Give 4 Wheel Parts a call too. Depending on who you get they are pretty good about parts, gearing, etc.