Help! calling all Rear Gear Ratio Experts for 2010 RT AUTOMATIC - Dodge Challenger Forum: Challenger & SRT8 Forums
Performance Modifications Want to talk about performance modifications for your Dodge Challenger? This is the forum for that. Anything from exhaust systems to power adders and everything in between. (Dodge Challenger Performance Modifications)

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#1 (permalink) Old 01-27-2011, 11:52 AM
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Help! calling all Rear Gear Ratio Experts for 2010 RT AUTOMATIC

Just picked up my fully loaded challenger R/T Classic. Traded in my 2006 Daytona.... Love the car but why or why did they use a 3.06 gear in the R/T????? My 06 daytona had a 3.53 (i think) yes it is an auto got it 10K less than MSRP so i over looked the fact that it was an auto. I wish i had come here before i bought it cause i would not have settled for the 3.06. I have 24 hours to give it back sooooo the Dealer is looking into what it would cost to put a 3.73.

Can you guys give me any insight. Part numbers, web links, and is it even do-able.

I know i need a predator tuner but im hoping that someone here in MI being that it is the motorcity state has a tuner that i can just pay 50.00 to use to retune.
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#2 (permalink) Old 01-27-2011, 12:24 PM
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What is the problem with the 3.06 gear,The auto trans has a 3.59 first gear.People are running 9.5 second 1/4 miles with the 3.06,Are you keeping the motor stock?The 2006 charger 198 diff had 3.07,
3.64,3.90 ratios.The 210 diff had a 2.82 ratio.You have a 215 open diff(no posi) in your Challenger.

Last edited by RMG; 01-27-2011 at 12:49 PM.
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#3 (permalink) Old 01-27-2011, 12:25 PM
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Your 06 Daytona shouldn't have had the 3.53...R/Ts had 2.82. They did have 3.58 first gear ratio (per Allpar) but final drive gear ratio was 2.82.

That being said all R/T Automatic Challengers have 3.06 gear ratio, if you would like teh 3.73 it can be done.

What you need:
Getrag Differential
New Axles
Pinion Bolt
Predator to change gear Ratio

Like this kit: Speedlogix 3.73 LSD Differential Conversion Kit 05-09 300, Challenger, Charger, Magnum R/T 5.7L, SRT8 6.1L

Chris "Mikey" | Sales and Support | Speedlogix, Inc.



If you have any questions, feel free to email me at: mikey@speedlogix.net!
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#4 (permalink) Old 01-27-2011, 12:27 PM
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9.0 sec 1/4 mile hmmmmmmm pass that dubbie please
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#5 (permalink) Old 01-27-2011, 12:46 PM
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Quote:
Originally Posted by flaharleyguy View Post
9.0 sec 1/4 mile hmmmmmmm pass that dubbie please
LX Forums | Dodge Charger Challenger Magnum | SRT8 | Chrysler 300 Forum - Timeslip Database
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#6 (permalink) Old 01-27-2011, 01:11 PM
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...errr

Okay... i went from newb to ultra super newb.wtf... was i just reading the wrong info?

So off the line the challenger should have more of a kick than my daytona based on what you all are saying but it feels like it doesn't...

Is it just in my head? Maybe its cause the daytona had an after market muffler and just sounded louder when i mashed it... and its just in my head...


Passing doobie around
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#7 (permalink) Old 01-27-2011, 01:18 PM
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Did you have a Predator tune on the Daytona?
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#8 (permalink) Old 01-27-2011, 01:23 PM
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Exhaust?

Not sure. I bought it used. oh well... i just took the challenger out for a spin at lunch...

I turned the traction controll off, and it launched off the line ... maybe its just cause of the exhaust


any suggestions for best sounding exhaust? Im leaning towards only changing the muffler... im guessing there is no reason to go to a cat back....

Any opininons?
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#9 (permalink) Old 01-27-2011, 01:33 PM
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Couldn't find any stock R/T classics automatics in the list puff puff. Come on man 9.0 with a 3:06 R/T classic with maybe a predator tune puffing away
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#10 (permalink) Old 01-27-2011, 01:33 PM
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Quote:
Originally Posted by kraylon View Post
Not sure. I bought it used. oh well... i just took the challenger out for a spin at lunch...

I turned the traction controll off, and it launched off the line ... maybe its just cause of the exhaust


any suggestions for best sounding exhaust? Im leaning towards only changing the muffler... im guessing there is no reason to go to a cat back....

Any opininons?

the auto guys definitely seem to consistently report that a predator tune kinda turns their car loose. I'd get in touch with Mikey and get yourself a predator. you'll forget you ever had the charger, lol

I dunno about off the line, but the chally should definitely have noticeably more through the power band than the charger. drop it from 3k to redline and see what you think. Any chargers I have run are decent off the line (and I'm not so much) but I simply walk them once we're rollin.



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