Re: [Chrysler300] Hurst transmission

[<smopar@xxxxxxxxxxxxxx>]

I would have to agree mostly with Mike on what was in the Hurst transmissions.  All 440 HP engines in 1970 and 1971 had the heavy duty rods that were also used in the six pack engines in the B and E body cars, and a few Sport Fury GTs and C body police 440s.  Thus all of these engines required a specially balanced torque converter.  All of the transmissions mated to these engines also had the extra clutch disc making for a 5 clutch drum.  They also had an extra planet in the planet carriers to handle the extra a torque.  I do believe they used a 12 inch convertor though I could be wrong about that as it has been at least 10 years since I rebuilt a couple of those transmissions.  I do not recall a special ratio lever.
Steve Albu
---- Don Verity <d.verity@xxxxxxx> wrote: 
> Hi Mike,
>  I think you are indeed confusing aftermarket modifications with factory equipment. 
> As far as I know, the only 440's with external balance were the 6 pack engines, and later cast crank engines. 
> The transmissions with the 5 clutch direct drum and wide band were 67-71 426 Hemi cars. They probably had the 5.0 lever too. Most others had the 3.8 lever. The converter in the Hurst was likely a 12 inch unit, as an 11 would cause to much slippage with a 323.1 axle ratio. The HP automatics in Dodge and Plymouth with steep gears no doubt had the 11 inch converter. 
> Unlike the early cast iron TF, the later aluminum 727 has plenty of aftermarket parts to make it into anything you like. I think 5.0 levers and big drums are over kill in our 300's. The 5.0 lever by itself will make for some pretty harsh street driving. With the shift kits available, it's really not necessary.  
> Don Verity
> Rhode Island
> 
> 
>     
>   I believe that all Mopars equipped with the 440 HP engines of the '70 & 
>   '71 varieties probably had the matching 727 trans to go with it. If I remember 
>   correctly it had an 11" externally balanced converter (to match the 
>   vibration dampner on the engines with the 6 pack style rods), an additional 
>   clutch and steel in the front clutch pack with a different arrangements of 
>   springs and or less springs than a standard unit, and I think a wider kickdown 
>   band with either a 4.2 or 5.0 ratio lever. 
> 
>   I may be mixing up some oem details with aftermarket upgrades but hopefully 
>   someone who's built some of these units can straighten up some of my 
>   recollections. Perhaps Don Verity?
> 
>   Mike Laiserin
>   Freezing in Phoenix tonight @ 39 degrees
> 
> 
> 
> 
> 
> 
>   In a message dated 12/23/2009 12:36:36 P.M. US Mountain Standard Tim, 
>   foxmotor@xxxxxxxxxxx writes:
> 
>   To all fellow Hurst owners,
> 
>   I've been wondering this for a while.......I've been wondering this for a 
>   while.......<WBR>.what EXACTLY is the difference between a "standard" 
>   production 727 trans and one
> 
>   converter, better clutches, higher shift points. So my question is what 
>   makes a Hurst
> 
>   transmission different form a standard unit? Thanks and Merry Christmas!
> 
>   Rick
> 
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>   
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> 



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