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Left Shark
Challenger SRT Hellcat
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1,141 Posts
Discussion Starter · #1 ·
You know they put some tall gears in the 6-spd Hellcats. I wonder what they will run if we swap them for some 3.73's, 4.10/4.11's....4.56's?

I don't want to run 60mph in 1st gear. I don't need to run 200mph...but I'd sure like to rip off a 9-second 1/4 mile!

Ring, ring..Hello Randy's Ring and Pinion...
 

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Left Shark
Challenger SRT Hellcat
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1,141 Posts
Discussion Starter · #3 ·
Yes I figure 3.73's would probably be the best middle-ground. I was just day dreaming...lol
 

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Yep, its got a HEMI
Challenger SRT Hellcat
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4,768 Posts
Have the 6 speed Richmond in my 70 with 3:73 gear set in my Dana 60. I wonder how different the gearing is compared to the Hellcat? Bigger tires. The Richmond is only over drive in 6th and 1st/2nd are lower. I am guessing the gearing is going to be so much better in the Hellcat.
 

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Challenger SRT Hellcat
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1,944 Posts
I believe the 6 speeds are equipped with 3.70 rear gears. My 14 SRT8 392 equipped with 3.90 rear gears. Have to shift to 2nd well before reaching 60 mph.
 

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Challenger SRT Hellcat
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608 Posts
Should be three shifts to the finish line in the 1/4..Easily! Gears are taller in the manuals Im happy with the painting no need to add my brush marks :)
I have about 750 miles on my new Hellcat 6 speed and the throws 1-3 are effortless any gearing change will void the 5 year warranty like a fart in a wind storm ..
 

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Have Guns Will Travel
2019 Challenger SRT Hellcat Redeye - 2015 Challenger Hellcat
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6,650 Posts
Tim K. stated the ECU was locked so.....
 

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Challenger SRT Hellcat
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608 Posts
They always crack it ....I know of two tuners on it right now.

Sadly many will drink from the tainted well again and Im gonna sit back in my lawn chair !!
Cuz its gonna be a show watching the process :)
 

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Premium Member
Challenger SRT Hellcat
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1,533 Posts
Honestly, I think anything shorter than the 3.55 area will only cause the tires to spin through third gear. 3.70 seems a bit short to me. The 3.92s in the '09 6-speed gave me fits launching it without wheel-spin or wheel-hop. A 2nd gear start didn't help either....
I can only imagine how tough it will be launching a 3.70 geared 707HP car without breaking the rears free on a regular basis - even on a prepped track.
 

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Challenger SRT Hellcat
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608 Posts
Honestly, I think anything shorter than the 3.55 area will only cause the tires to spin through third gear. 3.70 seems a bit short to me. The 3.92s in the '09 6-speed gave me fits launching it without wheel-spin or wheel-hop. A 2nd gear start didn't help either....
I can only imagine how tough it will be launching a 3.70 geared 707HP car without breaking the rears free on a regular basis - even on a prepped track.
Slicks are the only tire that will hook up on this car that's been obvious driving the HC around the past week ..No tire is gonna hold sadly but a MIckey Thompson ET for the street ...Oops did I say that ? I see the gearing issues as a non issue right now but that many change down the line.Way down the line
 

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Premium Member
Challenger SRT Hellcat
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1,533 Posts
Whenever I see gearing where first goes to 60mph or just beyond I assume the manufacturer's goal was a faster 0-60 time by eliminating the need to shift.
.....of course, you have to have the engine to pull it there, which in this case, isn't an issue. :D
 

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Challenger SRT Hellcat
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99 Posts
Second gear starts work best for me, so for me its 2 gears for a Quarter. IMO first gear is worthless unless driving normal, maybe it will change with drag radials but I doubt it.
 

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Challenger SRT Hellcat
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608 Posts
Second gear starts work best for me, so for me its 2 gears for a Quarter. IMO first gear is worthless unless driving normal, maybe it will change with drag radials but I doubt it.
This is how we launch at the Texas mile 2nd gear baby!! Roll off the power and hammer it hard 3rd thru 6th.
 
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i wouldnt mess with it....0-60 in 1st gear is where it should be with 707hp....without it you will just spin your tires even more
i wish the automatic was 0-60 in 1st...maybe it would get some better 0-60's and not just smoke the tires all the way up to 3rd
 

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1st in the auto should be labeled "2-low," and only be used for towing stuck Mustangs and Camaros out of the ditches and weeds they were blown into.
 
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