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Old 08-15-2012, 11:30 PM   #1
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3.73 gears

Im thinking about putting in 3.73s in my car. I currently have 2.73s and was wondering how big of a difference it is . I have a tune so I'm set with that just wondering what installation would run me ?
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Old 08-15-2012, 11:41 PM   #2
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Quote:
Originally Posted by geepoons
Im thinking about putting in 3.73s in my car. I currently have 2.73s and was wondering how big of a difference it is . I have a tune so I'm set with that just wondering what installation would run me ?
Install can be anywhere from $250-$500 depending on how hard you look.

Going from 2.73 to 3.73 it'll feel like you got kicked in the ***. It's gonna feel like you added 100rwhp.
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Old 08-16-2012, 01:22 AM   #3
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Quote:
Originally Posted by ColeJohnson

Install can be anywhere from $250-$500 depending on how hard you look.

Going from 2.73 to 3.73 it'll feel like you got kicked in the ***. It's gonna feel like you added 100rwhp.
What about 2.73-4.65?
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Old 08-16-2012, 03:34 AM   #4
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Originally Posted by NicholasP

What about 2.73-4.65?
Too much! You will come out of the gate fast but you will have a top speed of like 60! Lol
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Old 08-16-2012, 03:35 AM   #5
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Originally Posted by fultonboy09

Too much! You will come out of the gate fast but you will have a top speed of like 60! Lol
Why is that? Haha
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Old 08-16-2012, 04:16 AM   #6
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What about 4.10's
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Old 08-16-2012, 04:20 AM   #7
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Depends on what you want the car to do! If its just a drag strip monster then go with 410! But with our v6s 373 is a good place for our rpms to fall. I'll be getting 373 eventually and i like to road race and drift mine.
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Old 08-16-2012, 05:02 AM   #8
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Originally Posted by fultonboy09
Depends on what you want the car to do! If its just a drag strip monster then go with 410! But with our v6s 373 is a good place for our rpms to fall. I'll be getting 373 eventually and i like to road race and drift mine.
After my driveshaft I'm getting 373 gears and LSD
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Old 08-16-2012, 05:33 AM   #9
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Re: 3.73 gears

Do you have any clearance issues with a one piece drive shaft,,Im dropping 1 1/2 also,,all the around
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Old 08-16-2012, 10:03 AM   #10
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Re: 3.73 gears

Why do you want an LSD? These cars already have LSDs. They're not a torsen, but they work. If you have a locking diff, then you have a locking diff. It's not going to matter to 90% of the driving conditions you'd put it through.
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Old 08-16-2012, 10:59 AM   #11
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Re: 3.73 gears

Ya the Torsen, Eaton etc. are different designs and the weak link in the T lock is the S spring. The tabs usually tear off and well everthing comes apart then. But that said they are pretty strong and I have seen them only break on hard launches at the track and most of the time with slicks. As for road course I have yet to see someone break one but hard cornering does put stress on the rear end. Personally, If you arent going to track your car hard and frequently I think money would be better spent on having the axle tubes welded to stiffen them up and help keep them from bending or walking out and put the money into suspension upgrades to make the car handle better for the type of driving you will encounter on whichever form of racing you decide to participate in.

---------- Post added at 10:51 AM ---------- Previous post was at 10:34 AM ----------




My last one had the stock T lock in it with 430 gears (automatic), CHE axle bracing, Strange 10 Way adjustable drag shocks, Cobrajet drag springs, Steeda billet LCA's with the race bearings, FRPP girdle, J&M exteme adjustable UCA, and all the suspension bars by Steeda, Eibach, 1 DS etc. It was run at the track many times with street tires and slicks and it held up fine. This was way extreme for most and honestly drove like a drag car on the street. You will need to decide a good balance if you are going to drive the car on the street and the track. I built it for the 1/4 mile but it was not a good ride for the street.

If I had to do it all over I think I would have just welded the axle tubes and changed some of the suspension parts for the car to handle on the street better as it saw far more street use than it did 1/4 mile at a time on the track.

---------- Post added at 10:59 AM ---------- Previous post was at 10:51 AM ----------

Also, The trade off for more gear is that it will create more torque but uses horsepower to do that. So your torque numbers will go up but your whp will go down. Rotation mass such as flywheel, driveshaft, wheels, brake rotors if lightened using lighter or smaller diameter pieces will increase hp/trq and the car will rev up quicker as well. This is important if you are going to gear it as well because it could very well make first gear completely useless. So choose your setup as a whole before you decide to gear it. Tire width and height can play an integral roll (no pun intended) in getting the setup dialed in right for the track and the street when gearing a car.
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Old 08-16-2012, 01:45 PM   #12
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Quote:
Originally Posted by Red Stallion 11
What about 4.10's
4.10s are amazing. Read the info in my signature.
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Old 08-16-2012, 01:58 PM   #13
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Quote:
Originally Posted by ColeJohnson

Install can be anywhere from $250-$500 depending on how hard you look.

Going from 2.73 to 3.73 it'll feel like you got kicked in the ***. It's gonna feel like you added 100rwhp.
+1 You won't even believe what you feeling.
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Old 08-16-2012, 04:20 PM   #14
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Quote:
Originally Posted by Azure

+1 You won't even believe what you feeling.
It'll be like a Trojan commercial. But real.
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Old 08-16-2012, 05:12 PM   #15
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Originally Posted by ColeJohnson

It'll be like a Trojan commercial. But real.
Lmao!
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Old 08-16-2012, 07:29 PM   #16
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Re: 3.73 gears

Quote:
Originally Posted by Sanguin View Post
Why do you want an LSD? These cars already have LSDs. They're not a torsen, but they work. If you have a locking diff, then you have a locking diff. It's not going to matter to 90% of the driving conditions you'd put it through.
well if you put it that way......

you saved me about 250 bucks. thanks
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Old 08-17-2012, 06:03 PM   #17
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Quote:
Originally Posted by alrefire

After my driveshaft I'm getting 373 gears and LSD
These cars already have limited slip diffs, why buy a new one?
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Old 08-17-2012, 07:24 PM   #18
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Quote:
Originally Posted by ak_stang

These cars already have limited slip diffs, why buy a new one?
Do the 2011+ V6's have the 8.8 rear diff?
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Old 08-17-2012, 07:59 PM   #19
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Quote:
Originally Posted by Azure

Do the 2011+ V6's have the 8.8 rear diff?
Yes
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Old 08-17-2012, 08:52 PM   #20
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Yes
Thx! That saves a lot of mod money.
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Old 08-19-2012, 08:24 PM   #21
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Re: 3.73 gears

Quote:
Originally Posted by Sanguin View Post
Why do you want an LSD? These cars already have LSDs. They're not a torsen, but they work. If you have a locking diff, then you have a locking diff. It's not going to matter to 90% of the driving conditions you'd put it through.
i heard the stock dif whines with the ford racing 3.73 gears
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Old 08-19-2012, 08:41 PM   #22
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Re: 3.73 gears

No. No differential whines unless your installer did a bad job. All that is in a diff is ring, pinion, carrier, and bearings. You're replacing half the major components when you do a gear swap. If it whines when they're done, they didn't set the pinion depth correctly.
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