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Sonnax version of Kilgore Superlite Drum

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Old May 28, 2022 | 08:45 PM
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Default Sonnax version of Kilgore Superlite Drum

I have not really been active on these Forums, over the last several months; I searched but did not find what I was looking for...

Has anyone purchased, seen, or even hopefully had a chance to use the NEW Sonnax version of the Kilgore Superlight Drum?

For anyone who is not familiar with what I am referring to; it is a New THM400 Input-Drum/ Forward Drum Direct Drum Combination (based on a Product that John Kilgore created some time ago).

Thanks in advance for any new information provided!
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Old May 28, 2022 | 10:24 PM
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Is this what you're looking for? It's the only drum on Sonnax’s web site.

Smart-Tech® Drum Module 34555-01K




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Old May 28, 2022 | 10:27 PM
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Originally Posted by vorteciroc
I have not really been active on these Forums, over the last several months; I searched but did not find what I was looking for...

Has anyone purchased, seen, or even hopefully had a chance to use the NEW Sonnax version of the Kilgore Superlight Drum?

For anyone who is not familiar with what I am referring to; it is a New THM400 Input-Drum/ Forward Drum Direct Drum Combination (based on a Product that John Kilgore created some time ago).

Thanks in advance for any new information provided!
It is great to have you back. I hope all is well with you and family.
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Old May 28, 2022 | 11:02 PM
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Originally Posted by bbond105
Is this what you're looking for? It's the only drum on Sonnax’s web site.

Smart-Tech® Drum Module 34555-01K


Yes my Friend (and Thank You for the well wishes).


I am hoping that someone here has had a chance to Purchase one or Run one.
I probably should have Post and Image of the Drum...
So thank you for that too!

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Old May 31, 2022 | 03:20 PM
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We haven't gotten our hands on one yet but I did call just out of curiosity to see what our commercial account cost was and let me just say... holy cow!

-Dalton
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Old May 31, 2022 | 04:38 PM
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yeah no kiddin they are proud of that unit
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Old May 31, 2022 | 06:36 PM
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I am not surprised about the Price...
I take it you guys have not run the Kilgore Parts?
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Old Jun 1, 2022 | 10:24 AM
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correct, i havent built anything for that power level yet
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the kilgore stuff is neat and he did a great job working with what was available and keeping it affordable enough for people to buy it

this sonnax stuff is like a cadillac comparatively.
I'm sure you've seen their fwd drum and the quality it is...this is the same but even more trick.
I'm not wild about their 1" input shaft design but their 1.125 shaft is nearly perfect in 300m
If they revise the 1" input shaft I think it could be a real contender up to and past the 2500hp mark probably if the right material is used
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Old Jun 1, 2022 | 02:38 PM
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Originally Posted by MaroonMonsterLS1
the kilgore stuff is neat and he did a great job working with what was available and keeping it affordable enough for people to buy it

this sonnax stuff is like a cadillac comparatively.
I'm sure you've seen their fwd drum and the quality it is...this is the same but even more trick.
I'm not wild about their 1" input shaft design but their 1.125 shaft is nearly perfect in 300m
If they revise the 1" input shaft I think it could be a real contender up to and past the 2500hp mark probably if the right material is used
I have never used the Sonnax 1" input shaft (or any Sonnx Input for the THM400)...
What did you see in testing?

If it is the Design that I have seen... I do not like the design of where the Turbine-Splines end.
That transition could have been much better... I don't want to see much up an under-cut on anything that will have some power put through it.

This transition on the 1.25" Part is substantially better!
Below for anyone that has not seen the 1.25" Part:


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Old Jun 1, 2022 | 02:43 PM
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Also, anyone trying out any other New Sonnax Parts?



Last edited by vorteciroc; Jun 1, 2022 at 04:07 PM.
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Old Jun 2, 2022 | 03:29 PM
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i dont believe they are new but I've been using the direct drum repair sleeve. especially handy on older, fully aluminum drums
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Old Jun 22, 2022 | 04:50 PM
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To be honest, I'm mostly still just waiting for someone to disassemble that new 4L75-R or whatever it's called nowadays. I'm not expecting anything mind blowing, but I am curious to know what GM cooked up to make them feel bold enough to make the torque capacity claims they have.
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Old Jun 22, 2022 | 04:56 PM
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From GM Authority

"Other highlights of the 4L75E-R include a strong six-pinion input carrier and sun gear, a heavy-duty output shaft, a higher capacity servo and specific valve body calibration. "
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Old Jun 22, 2022 | 05:16 PM
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Originally Posted by theunderlord
From GM Authority

"Other highlights of the 4L75E-R include a strong six-pinion input carrier and sun gear, a heavy-duty output shaft, a higher capacity servo and specific valve body calibration. "
I have seen that, but it's super vague and I'd like more actual detail on the changes themselves. Seems it will be awhile until anything substantial emerges.
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