3.15 gear?

[Need4Speed15]

Loose converters that you wouldn't use on a dd. The slippage keeps the engine in the powerband...for the record.

Seems everyone's doing it wrong...all you need is a 'glide in your street car.:doh:

You my friend have a reading comprehension problem, re-read my post and you will see that I specifically say "high hp track cars"....I posted that because your the one who brought up "Top Fuel" cars and single speed transmissions...lol

Anyway, I could care less that you disagree with me and the countless other people that have real life experience with 3.15's and the 6R80 transmission. Yeah I guess everyone has been doing it wrong all these years and your the only smart guy out there that knows the right way!

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[Herr_Poopschitz]

You my friend have a reading comprehension problem, re-read my post and you will see that I specifically say "high hp track cars"....I posted that because your the one who brought up "Top Fuel" cars and single speed transmissions...lol

According to the FAA and other gov't entities, I have pretty damn good reading comprehension...thanks for the personal attack though, 'friend'.

The logic you use defends the idea of less gears are better. I'm sorry that what I thought were explicit examples confused you.

Let me try again. It's about keeping an engine in its powerband. Race cars have the advantage that they are purpose-built for one thing. Street cars don't have that luxury. A way to keep an engine in a narrow powerband as a car accelerates is to increase the number of gears it goes through. A CVT is like an infinite number of gears. A slipping clutch that keeps the engine at max hp and finally has full engagement at the finish line acts on the same principle. Maybe you aren't familiar enough w/ drag racing or power transmission to understand my examples? Regardless, applied correctly, more gears are better. Physics and engineering at work.

Anyway, I could care less that you disagree with me and the countless other people that have real life experience with 3.15's and the 6R80 transmission. Yeah I guess everyone has been doing it wrong all these years and your the only smart guy out there that knows the right way!

Nope, lots of smart guys out there...you just have to pay a little attention.

Here's a simple example. Nice, streetable 3200 converter, small cam, 4k lbs, daily driver capable 4 door...w/ stock short block and no power adder...yep, we don't know anything. This car would NOT go faster/quicker using your 3 gear rule...

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The physics and mechanics are the same. 6L80 ratios are similar to Fords 6R. Parts don't know what names they have on them.

 

[Need4Speed15]

According to the FAA and other gov't entities, I have pretty damn good reading comprehension

Be careful you might hurt your hand patting yourself on the back!

Nope, lots of smart guys out there...you just have to pay a little attention.

Here's a simple example. Nice, streetable 3200 converter, small cam, 4k lbs, daily driver capable 4 door...w/ stock short block and no power adder...yep, we don't know anything. This car would NOT go faster/quicker using your 3 gear rule...

https://www.youtube.com/watch?v=SrW_n_cFjOA

The physics and mechanics are the same. 6L80 ratios are similar to Fords 6R. Parts don't know what names they have on them.

Please do your research of 2011+ N/A 6R80 Mustangs with either 3.15 gears or 3.31 gears. Those 2 ratios will allow the car to go through the traps in 3rd gear.

You see, I like to use actual examples of the cars we are talking about...I wouldnt post a video of a completely different car/engine/chassis, etc to try and prove a point! I'd rather just post very specific examples of the cars we are talking about in this very thread on this very board. Yes, Mustangs! 6R80 Mustangs! 6R80 N/A Mustangs going through the traps in 3rd gear!

Here's a few videos proving the "3 gear rule" actually works! LOL

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[Need4Speed15]

Anyway, back to the OP...no need to swap them gears. 3.15's are a capable gear with these automatic coyotes!

 

[Gdyup50]

OP here, LOL.....I just wanted some knowledge about why I had 3.15 gears and everyone else seems to have 3.35 or others.....I got what I needed, this is getting entertaining

 

[Need4Speed15]

OP here, LOL.....I just wanted some knowledge about why I had 3.15 gears and everyone else seems to have 3.35 or others.....I got what I needed, this is getting entertaining

NP, 2011-2014 autos only came with 3.15's - there was no other option...the 3.55 gear is a new option for the 2015's.

So the 2015 autos only have those 2 possibilities - 3.15's are standard and the 3.55's are an option.

Anyway, enjoy your car!

 

[Herr_Poopschitz]

Be careful you might hurt your hand patting yourself on the back!

Just pointing out that your accusations and name calling don't hold a lot of weight in the real world.

Please do your research of 2011+ N/A 6R80 Mustangs with either 3.15 gears or 3.31 gears. Those 2 ratios will allow the car to go through the traps in 3rd gear.

Yes, that's been your point this whole time. 3rd gear. Got it.

Can the 6R80 not handle WOT shifts into 4th? Maybe that's the true culprit...

You see, I like to use actual examples of the cars we are talking about...I wouldnt post a video of a completely different car/engine/chassis, etc to try and prove a point!

Exactly why I posted that parts don't know the brand that's printed on them. I see them as machines...not Ford or GMs. All the same principles apply...the mechanics and physics are identical, whether you want to believe it or not.

I'd rather just post very specific examples of the cars we are talking about in this very thread on this very board. Yes, Mustangs! 6R80 Mustangs! 6R80 N/A Mustangs going through the traps in 3rd gear!

Do you have any examples of stock, or at least cars with converters that stall less than 4200 rpm, available that might use lower gears and actually shift into 4th and trap in the mid to high 120s? A 4200 stall isn't exactly what I'd recommend a customer building a street car. I'd let the mechanical torque multiplication (gears) do the work instead of the converter. This would net much better driveability as well as gas mileage in traffic. Have you driven a car w/ that kind of converter on the street...much less as a dd? That's the only way to make such high gears really work.

Here's a few videos proving the "3 gear rule" actually works! LOL

Neat? A bunch of vids w/ little to no technical datapoints. The only car that caught my eye uses the previously mentioned 4200+ converter. Are you recommending the OP purchase one of these as well?

Do you have any technical details regarding ANY of the cars you posted? Any technical anything, for that matter?

I'm just wondering why the car I provided as evidence (I can give you the owners phone number) is quicker than all of the examples you posted...w/ MUCH more weight, a converter that is significantly more streetable, and inferior heads...? I'm trying to remain respectful, but I can't help but think this is where you'd put an "LOL".

Good luck w/ your internet racing and make sure to keep doing things the 'accepted' way. It's a great way to never excel.

Seriously, can a 6R80 not handle WOT into 4th?

 

[Need4Speed15]

I can't keep this up (well really I can, but I choose not to), you've made your point and I believe I've made mine. Let just agree to disagree about this topic.

If the original poster or anyone else wants to do their own research there are many examples out there with stock gears as well as people who have experimented and swapped gears...additionally with high stall converters and stock converters. Lots of info out there on the 2011-2014 cars.

 

[Old 5 Oh]

So basically I am slower than everyone else? LOL

Not really. Check the 1/4-mile threads on this site. The GT AT 3.15s are running 12.8-12.9. The PPs, with the mighty 3.73, can't quite get there, running 12.9-13.1. The hot ticket is the AT 3.55, which I have seen as low as 12.6 stock.

Those of us with the 3.15s in GTs take a lot of grief from the short-gear majority, but I chose my gears intentionally and got the quiet, relaxed highway cruiser I wanted at very little sacrifice in acceleration and with the bonus of a couple more mpg as the cherry on top.

 

[Old 5 Oh]

To most people differential is synonymous with the entire pumpkin even though technically the differential is inside. I would search for 2015 mustang 3.73 differential and see if it is the entire aluminum carrier, gears, and cover. All 3.73 have the Torsen and they all appear to be the aluminum carrier as well (I've only seen 2 so I'm not sure about the aluminum carrier part). The cast iron carriers are easy to spot as they are rusty.

All the 3.73 Torsens are PP pumpkins, and ALL are cast iron. If you see someone advertising a 3.73 in an aluminum carrier, Ford didn't build it.

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