Author Topic: Going gearless  (Read 5529 times)

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Offline TomC

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Going gearless
« on: November 05, 2005, 10:45:24 am »
*Going gearless*
Post by Squidd on Jun 5, 2005, 12:05am

Does anyone pull the extra gears from their transmission/transaxle to
reduce excess drag...?

I have an 829 T/A with 5 speed in line and was thinking of pulling the
2nd-4th "fixed" gears from the countershaft so they don't have to spin
the shift gears at differing speeds while running in 5th...

Need 1st for the pits and 5th for racing, but reverse is nice,
especially with the LeMans starts...Unless you think there is a
significant gain in pulling that too...??

*Re: Going gearless*
Post by George Herrin on Jun 6, 2005, 8:53am

Some do most don't I hav tried it either way and couldn't or didn't
notice any difference. So I don't do it anymore. I just leave em all in.
*Re: Going gearless*
Post by Squidd on Jun 6, 2005, 9:29pm

That on three speeds...??

With 5 in mine it just seems like I can hear a lot of "whinning" and
there has got to be a bit of frictional drag with 4 of the 5 gear
"pairs" spinning at differing speeds...

I think I'm gonna try it on mine for the next race...maybe go 3rd and
5th cause 1st seems awfully slow even for the pits...

Maybe not make me "noticeably" faster, but at least run cooler and be
easier on the internals...
*Re: Going gearless*
Post by Squidd on Jun 17, 2005, 11:30pm

I pulled 6 of the 10 gears from the trans and replaced the grease with
gear oil (sealed)

Much less drag when spinning the input pully and noticeably less
"whinning" while driving...still has some, but I guess they all do that...

Will I go "faster"...?? I don't know, but I can't see it hurting me..
*Re: Going gearless*
Post by jake100 on Jun 29, 2005, 11:20pm

Well how did that work out? What did you do to take up the space of the
gears you removed? JK-n-OK
*Re: Going gearless*
Post by Squidd on Jun 29, 2005, 11:45pm

Well....Good and not so good...

Tranny was lighter in rotating mass so I feel a bit quicker and smoother...

However I got "busted" in Tech .... seems in IMOW and Stock the trannys
need to be "untouched" , or at least all the gears need to be in
them...(I'm sure they let you add bearings and steel gearsets for

I used pieces of pipe turned on a lathe and then shimmed to take up
space of removed gears...

They did let me race (I was suppose to have it changed back before next
race date) and I did dominate the the heat race...till the last
lap...when the tranny "lunched" itself...

Upon tearing the tranny down, the problem was not with the removed
gears, but that the driven pully had sheared from the hub ..and as it
"grabbed and slipped" it caused the countershaft to "wallow out" the
aluminum housing ...(which was a weak point on "this" particular tranny
already)...that just made way for a whole bunch of filings and grindings...

But the gears and spacers were fine and still in place on the main shaft...

Anyhoo...I switched it out for an H pattern 3 speed (less gears to
start) and hardly "tweaked" it at all....(no..really... ;) )

Fortunatly, Art Nevill let me (actually insisted) I run his IMOW in the
Feature (he was running three mowchines) ...

I took the checkered...