Rockford Racing: How does a lenco work? - Rockford Racing

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How does a lenco work?

#1 User is offline   JACE323 Icon

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Posted 23 February 2006 - 01:23 AM

As stated in the other thread I have always wonderd how this tranny worked would someone please be kind enough to explain this to me. Thanks.
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#2 User is offline   Greg Icon

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Posted 23 February 2006 - 10:06 PM

View PostRitter, on Feb 23 2006, 07:09 PM, said:

heres how a leno works: you have a bunch of gears, and a bunch of levers. you choose a combo of levers and jam them when racing. plus its like 10 feet long. put a torque converter on the end and you have endless possibilities.

Thanks Ali, I'm sure that answers everybody question on the complex natures of this somewhat primitively designed transmission.
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Posted 24 February 2006 - 05:59 AM

Thanks Ali. I never thought it was that simple.
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Posted 24 February 2006 - 12:58 PM

Could we get back on topic and have someone give a serious answer?
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Posted 24 February 2006 - 01:04 PM

Point your browser towards www.lencoracing.com

THey have schematics there. When I get a chance I will post the little understanding I have of these. Maybe I will get off my ass and do some research too.

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#6 User is offline   PWR RYD Icon

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Posted 24 February 2006 - 01:17 PM

Work....

Copy and Pasted right from Lenco's website:

The LENCO ST1200 transmission is a planetary style design and is available in single case 2 speed unit or in a multiple case multiple speed configuration. Each case is intended to provide two forward speeds and multiple speed transmissions are created by multiple case attachment. A five speed, for example, requires four cases. In all circumstances a separate reverse unit is required for reverse movement of the vehicle.
LENCO transmissions employ a central sun gear with three planet gears that revolve around it. The planet gears are engaged to an outer ring gear. Our transmissions also utilize a multiple clutch/disc pack. When the transmission is shifted from first to second gear the clutch pack is compressed against the sun gear assembly. At this point the entire rotating assembly is shifted to a locked 1:1 ratio. All shifting is done without engine and clutch disengagement. Through this fashion there is no lost time and lurching shock from clutch action. Equally important is the fact that internal transmission shift pressure is easily adjustable to adapt to changing track conditions.
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#7 User is offline   1slowhonduh Icon

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Posted 24 February 2006 - 05:09 PM

you learn something new everyday... thanks buddy
BLEH
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Posted 24 February 2006 - 05:20 PM

I think in the other thread you asked about these being in Pro Stock cars as well. As far as I know all of them have moved on to using Liberty's. Which looks similair in operation on the outside but I really have no idea whats going on inside of it.

Posted Image

Posted Image
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Posted 24 February 2006 - 10:55 PM

View PostTHEMADTYPH00N, on Feb 24 2006, 05:07 PM, said:

I think in the other thread you asked about these being in Pro Stock cars as well. As far as I know all of them have moved on to using Liberty's. Which looks similair in operation on the outside but I really have no idea whats going on inside of it.

Posted Image

Posted Image


After seeing those pics I want one.
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Posted 25 February 2006 - 01:55 AM

Two completely different animals:

Lenco = multii stages of clutch engaged planetary gear sets

Liberty = constant mesh cluster gear box (heavily modified ring blocker design)

This post has been edited by PWR RYD: 25 February 2006 - 02:59 AM

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Posted 25 February 2006 - 03:04 PM

HOLY SHIT LOAD OF STRAIGHT CUT GEARS BATMAN!
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Posted 25 February 2006 - 03:18 PM

WASNT THERE A GUY WHO WAS USING A LENCO ON THE STREET? he was in hot rod or something.
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Posted 26 February 2006 - 03:11 AM

View PostRitter, on Feb 25 2006, 03:05 PM, said:

WASNT THERE A GUY WHO WAS USING A LENCO ON THE STREET? he was in hot rod or something.


Yeah it I saw that. I cant remember what it was for but I remember him mentioning he had to change the trans fluid every day or the stator would burn up.
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