Reverse lockout shifter for TKO 600?
Thread Starter
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Reverse lockout shifter for TKO 600?
Does anybody make a reverse lockout shifter for our C-3's? My occasional problem is during the 5-4 down shift. I sometimes get a grind when trying to yank it down to 4th gear.
Another idiosyncrasy is the TKO's inability to shove it into first gear unless your really going slow. I've even blipped the throttle to rpm match without any luck. Our local road racing track has some slow hilly section with tight turns and first gear would really help
5speed console plate
Parked at 8500 feet elevation near Lake Tahoe
Another idiosyncrasy is the TKO's inability to shove it into first gear unless your really going slow. I've even blipped the throttle to rpm match without any luck. Our local road racing track has some slow hilly section with tight turns and first gear would really help
5speed console plate
Parked at 8500 feet elevation near Lake Tahoe
Thread Starter
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
TT - I doubt if it's a sycro first because it gives this whine and won't go in even if you muscle it. I also have a certian amount of clutch drag unless I really remember to put the petal to the floor.
I would preferr more petal effort and a very short engagement and dissengagement. Maybe some day i'll get a real tranny that doesn't require a clutch once your moving.
the 5 speed really is a good time - My U-joints are even holding out so far.
I would preferr more petal effort and a very short engagement and dissengagement. Maybe some day i'll get a real tranny that doesn't require a clutch once your moving.
the 5 speed really is a good time - My U-joints are even holding out so far.
Race Director
Joined: Apr 2000
Posts: 17,676
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From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Originally Posted by Twin_Turbo
learn to shift properly you guys 
George, when downshifting from 5th to 4th just pull the shifter back to neutral and it wll be in the correct positon and then just pull straight back it will go into forth, don't force it.
Melting Slicks
Joined: May 2005
Posts: 2,826
Likes: 3
From: Tennessee
Originally Posted by Twin_Turbo
learn to shift properly you guys
Is that tranny full synchro (so also on 1st?)
Is that tranny full synchro (so also on 1st?)
The TKO is fully syncronized including first. Reverse is not syncronized, thats why we recommend going to a forward gear 1st then going into reverse.
As for not being able to get it into first except at very low speeds.... the 1st gear ratio is so great you have to overcome alot of rotating mass(and small surface on the syncros) to mesh and allow you to go into 1st at a rolling speed.
Theoretically(spelling??) if the 1st gear syncros were bigger, it would allow you to downshift at a greater speed but the force would probably throw you thru the window or strangle you on the seatbelt
Richard
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Originally Posted by Twin_Turbo
So..they took out all the fun so even the noobs could shift it? 
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Thread Starter
Team Owner
Joined: Apr 1999
Posts: 21,953
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Originally Posted by rj8806
George:
The TKO is fully syncronized including first. Reverse is not syncronized, thats why we recommend going to a forward gear 1st then going into reverse.
As for not being able to get it into first except at very low speeds.... the 1st gear ratio is so great you have to overcome alot of rotating mass(and small surface on the syncros) to mesh and allow you to go into 1st at a rolling speed.
Theoretically(spelling??) if the 1st gear syncros were bigger, it would allow you to downshift at a greater speed but the force would probably throw you thru the window or strangle you on the seatbelt
Richard
The TKO is fully syncronized including first. Reverse is not syncronized, thats why we recommend going to a forward gear 1st then going into reverse.
As for not being able to get it into first except at very low speeds.... the 1st gear ratio is so great you have to overcome alot of rotating mass(and small surface on the syncros) to mesh and allow you to go into 1st at a rolling speed.
Theoretically(spelling??) if the 1st gear syncros were bigger, it would allow you to downshift at a greater speed but the force would probably throw you thru the window or strangle you on the seatbelt
Richard
I'm getting my 427 all rebuilt, so that's when i'll install it.To make my clutch work better I drilled another hole in the cross shaft petal end closer to the center of rotation. This makes less petal movement, move the throw out bearing farther. Idealy the petal should also be drilled farther down so it would also help move the throw out bearing faster.
I would sacrifice more petal effort to have a shorter distance to engage and disengage the clutch.
Other than that I'm very pleased. I really think that my buzzing shifter handle was really a crack in my crank shaft and the motor was eating its self up. Because it sheared not long after installing the TKO. That block saver got a good gouge in it when the crank shaft broke.
I installed my spare solid roller 383 motor and it is so smooth in comparison. I used the much longer McLeod tranny dowls and I was able to get it down to 12 o'clock = +.002 3 o'clock = +.002 6 o'c =.000 9 o'c -.000
Thread Starter
Team Owner
Joined: Apr 1999
Posts: 21,953
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Originally Posted by Shark Racer
Are you double-clutching or single-clutching the downshift to first?
Down shifting into first actually can be accomplished from second gear. What i was doing wrong was skipping gears while under hard braking and not using each gear. It's still kind of limited to maybe 4000 rpm rear tire speed when it goes into first gear. It won't allow you to over speed the motor.
