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4.11 sure grip

73 kooda

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Is anyone here running this with a 4,5 or 6 speed tranny. I have 4.11's and can't drive over 60 on the freeway without screaming at 4500 rpms. Of course the launches are great but zero top end.... Car won't even do 90 mph...whoever had it before me set rev limiter at 5000 ... Ugh... any suggestions or advice would be great... I would like to keep the 4.11's only cause the low end... I can weld and fab so I'm not afraid to make a 6 speed fit... Engine is a 340 with a small cam ( unk spec ) hooker headers Holley 675 street avenger on top of a rpm air gap manifold, with small heads.. Tranny is now a 904 ..thanks fellas
 

pagilman

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Are you exagerating or are those numbers correct. I am looking to change my center section and I was hoping 4:11 would put me at about 3500 @ 60 mph. Thanks for the warning.
 

burntorange70

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Passion and Mcloud is coming out with a no cut 5 speed. Keisler has a TKO that will work with some mods to the trans tunnel.
 
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Big Jim

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Don't know what size tires you're running, but for the simplest fix run the tallest tire you can find- speedo will be off but you can figure the rpm for each gear (The taller the tire the higher the overall gear ratio, and vise veresa)
 

73 kooda

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14 Inch rally's ...I wanna step up to 15's but I like the rallys .. Probably leanin towards the tranny swap.. Cause i like the 4.11 at the line...just need more gears ..
 

burntorange70

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14 Inch rally's ...I wanna step up to 15's but I like the rallys .. Probably leanin towards the tranny swap.. Cause i like the 4.11 at the line...just need more gears ..


Rim size has nothing to do with it. How tall are your tires?
 

73 kooda

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55 mph is right at 3500 .... 65-70 is like 4500 rpm... My tires are 24 1/2 " tall. Thanks to everyone for their 2 cents..... I love the mopar community!!.... Its definitely no fun to drive on the freeway..plus my motor is looooouuuuuudddddd.... Which makes worse ... But who wants a quiet motor!!
 

73 kooda

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I just figured 1 inch bigger rim could get me 1 inch bigger tire..... Who here wouldnt mind an extra inch...haha.... Happy labor day!
 

73 kooda

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Hey burnt... What combo are you running...I wAnna be able to cruise about 80 with no problem...but wanna be able to open it up when no cops are looking...in my opinion my tires look pretty tall..aestheticAlly speaking if I went much taller...I think it would look kinda funny...I also like the pull off the line...I had an old chevy that was a pig on the Line runnin 3.08's but it would accelerate hard all day at 80-90 mph...maybe I'm chasing the golden fleece..
 

burntorange70

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Hey burnt... What combo are you running...I wAnna be able to cruise about 80 with no problem...but wanna be able to open it up when no cops are looking...in my opinion my tires look pretty tall..aestheticAlly speaking if I went much taller...I think it would look kinda funny...I also like the pull off the line...I had an old chevy that was a pig on the Line runnin 3.08's but it would accelerate hard all day at 80-90 mph...maybe I'm chasing the golden fleece..


Ya the only way to have both is to put in a 5 or 6 speed.


Well I got about the same height tire you do, may be just a little shorter but with 3.23 gears. She runs 60 MPH @ 3000 RPM and 80 @ 4000 RPM. Wish I had more gear when I am at the track and less on the free way. LOL

She is my street car so I am going to put some 26' tires on her and call it good. Should be around 70-75 @ 3000 RPM that way.


What I would like to do if I had the money would be to run what ever gear and tire size I would need to be going through the traps at the track at what ever RPM the motor likes once I rebuild it. Lets say around 6000-6500 RPM in 4th gear through the traps, then put in a 5 speed and have a 5th gear to get me home on the free way and be able to run 70 @ 2500-3000 RPM or so. You know "If" I had the money. LOL





To me it goes like this in no order.

1) gear it to be quick.
2) gear it to cruise down the free way at a low RPM.
3) Split one and two and have gears that will do ok at the track and on the freeway. IE 3.23 or 3.55 depending on you tire hieght.
4) Put in a a trans that has overdrive.



:dontknow: Sorry, I know that's not much help. In the end it is up to you and what you want and how you drive.:eusa_think:


Good luck.
 

73 kooda

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Ok so I'm gonna prob run 17 or 18" wheels with decent size meat on them ...then I'll do a 5 or 6 speed ... Depending on the amount of fab I gotta do..and cost...then ill reduce the gearing if I have to....gotta love projects....thanks for everyones input ...I'll prob run 275 /60 on whatever rim I decide...I'll keep everyone posted!!!!
 
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