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Discussion in 'Drivetrain' started by RyanCess, Jan 1, 2016.
What would be the best gear ratio to get for my 3.8L V8 if I were to get racing gears for my car?
I may be wrong and others will chime in, but im thinking the v6 cars came with 7.5" rearend ring gears and the v8 cars came 8.8". Im not sure where v6 parts could be purchased. Do you know what the rear ratio is in the car now? Ford mounted a tag to one of the rear diff cover bolts with numbers stamped on it. Get under the car and check it out. Report back.
If it's an automatic go 4.10 Gears, if it's a stick shift go 3.73 Gears. Only buy Ford Racing! Best gears to get.
7.5 with 273s. You can purchase gears at most places like American muscle.
Switch to 373s. Look into limited slip as well.
Ideally you would source a 8.8, rebuild it and swap it in.
3:73 gets my vote too. You can get a limited slip 7.5, they're out there as well.
CL usually has 8.8 rears, some already have the gears in them ready to go. You can get a Fox 8.8 and swap in your brakes and axles too.
And what exactly do the gears do? I read that it changes the powerband of the rpm's. Is that's right? I'm a noob :/
And what's the difference between the 373's and the 410's?
What else do i need besides the ring and pinion gear? I'd most likely have a shop install them.
The 7.5 gear set can be swapped in with no other components. The shop should be competent enough to use the exsisting bearings assuming the rear has no proplems now.
Buy FordRacing proper rearend gear set of your choice size and take to a shop. Roughly $200labor
If the rear gear in your car now is a 2.73, switching to a lower ration (although numerical higher) 3.73 or 4.10 will multiple the torque out put at the rear wheels. Or you could look at it like this....your 1st gear now can top 50mph at redline. Swap in the 4.10 and it will be 25mph. The same applies to the other gearing speeds. The car will feel quicker off the line and the engine load will be less
would they need any other components to do the 3.73? That's what I plan on getting.
Alright, I would personally try to find a good shop by you. A lot of places around here, would not install gears unless we bought from them. They also would not install any gears that were not Ford racing.
As mentioned, ideally you would find an 8.8 rear end and get that rebuilt with new gears, then just install it. I wish I had done this.
However, you basically just need to order an install kit. Some shops don't have the 7.5 stuff sitting around, but every shop should have 8.8 stuff.
And the 7.5 rear end is what I have?
And the 3.73 gears can fit in the 7.5? I think I'm getting it now. I just have to ask the shop if the have the right equipment for my rear end?
373 gears made for the 7.5 will install in the 7.5
Bingo, the GT cars came with an 8.8, the V6 a 7.5 without a limited slip, so we have the curse of the "one wheel peel"
Going from 2:73 to 3:73 is similar to riding a Mountain bike. When it's hard to peddle, you downshift by moving the rear gear to a larger sprocket. It's easier to peddle, so in the car the motor will be able to rev up faster.
So by doing his my car will be torquier? And what is one wheel peel? Lol
It will feel torquier. No actual power is gained. Jump on a mountain bike and do the experiment mentioned earlier. The one wheel peel is, for example, you are at a stop light, you rev up and drop the clutch. Because it is an open differential, all of the power will go to one wheel and spin while the other tire will just move like a front tire. You can Google how a limited slip works.
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A limited slip differential is way better for handling and taking off. The one wheel makes for a lot less traction. If you get gears for the 7.5 I would get a limited slip differential put in place. I believe some rangers came with them.