Lencodrive transbrake.

Lencodrive transbrake will not engage.

Therefore I can't change forward to reverse ect.

Car still drives hard and fast if started in gear.

Has anybody ever had an issue and what could it be.
Thanks Wayne Talbot.

 

If the trans brake will not disengage, then the trans will not drive, when you are trying to change from forward to reverse, is your foot still on the brakes?, and have you ever tried slightly pulling on the reverser lever and letting go of the trans brake? Also are you using the same hand on the button and the lever. ie. button on top of shifter?

 

Sorry I meant engage.
Has been working.
But on the weekend did two laps and on the 2nd could select reverse after burn out but once back could not get forward was stuck in reverse.
Took it back it pit area and run car up on stands.
Fired the motor in forward and run ok
But still no transbrake hence I could not move to nuteral or for that matter reverse.

The transbrake has given up on me.
Only has 20 laps on the trans since new.
And we always leave from low revs.

 

Lenco drive

Wayne,
Check your Battery (Not with a volt meter) it might have charge when car is first started, But after the burn out it wont have enough power left in it.
I had this problem in Sydney. you will end up smashing the reverser.
Call me 0419196725 Dave

 

Make sure your foot isn't on the brake once the car is stopped and TB engaged. If moving the shifter and encountering resistance, try dribbling the button once. By dribbling I mean while trying to put it into either forward or reverse, keep pressure on the shifter and release and press button again quickly. Generally that will fix the problem, just stuff isn't lining up perfectly inside the trans - very common. If that doesn't do it then you may need to replace the forward drive gear in the reverser. You can pull the reverser with the trans out of the car and check this. The gear attached to the fork may not be mating with the gear on the reverser shaft. You'll have to pull the sprag cover, remove some snap rings, slide it out and change the gear. You'll see excessive wear on the gear if it's bad. Best of luck and let us know what you find.

Brandon Booher
NHRA TAD #3
Torque MGMT. - Owner

 

Brandon - Wayne's transbrake is not working...

Wayne, I agree with Dave that it's likely electrical, but I would suspect that if you have no transbrake, rather than one which 'creeps', it's not a low voltage problem but a 'no voltage' problem... Check the connections between the battery, the TB button and the Lencodrive.

Our onboard battery went away over time - still had enough power for the MSD points box, the transmission controller, the racepak - but we'd (occasionally) smash reverser gears. Only at the end of last season did it started 'creeping' on the brake and we finally figured that we were short on volts when the TB was engaged...

 

With the car not running hit the transbrake button and you should be able to hear it click.
If it doesn't click use a volt meter on the power side of the solenoid to make sure you have 12v coming in when the button is activated.
If you have 12v coming in, the problem is internal . The solenoid or possibly the internal wires to the solenoid have spun and are shorting out inside the transmission or the valve body or clutch pack.
If you take the valve body apart make sure all the buttons and pistons go back correctly because I know for a fact if the one piston goes in backwards it can look right but it will not fully close and you won't have a transbrake .
You can not have the valve body too clean.
You can bench test the solenoid .
If that isn't the problem then you will need to pull the lencodrive and check the clutch pack .

 

I'm very much aware but since he didn't say that it was or wasn't clicking - my previous post is a real possibility as I've seen it many many times. He stated it wont engage, couldn't get it in gear, my post is applicable to such. As Bob stated VB would be next. You can pull the pan and put 12v on the terminal posts, you should hear everything engage cleanly. If it doesn't then you have buildup inside the shuttle and need to clean it out.

Brandon Booher
NHRA TAD #3
Torque MGMT. - Owner

 

I had the volt meter on the post of the trans.
Has 11.5volt

It's clicking but I'm not quite sure if it's as loud as it used to be.
It just seems strange that it worked at the forward to reverse shift at the end of the burn out but
Once I backed it would not work. Hence I could not select forward.

I have the trans on the bench now.
Where should I begin.

 

Sorry Brandon. Didn't mean to criticise your post since you know a da** sight more about it than I do. I know whether the TB is working on my car as it pulls the motor down when it's engaged. Since my car is my only Lencodrive experience, I assumed that the same applied to all similar setups ....

 

Thanks for all the responses.
Brandon hit it on the head.
Took the value body apart and it was a little dirty.
Clean it down now transbrake solenoid hits hard.
Before this it was weak and not moving though it's entire stoke.

Thanks Mick Snyder for the fast response while at the race track.

Now just going to unbolt the converter and clean it out to while on the job.

 

Yeah , your welcome!

 

PreparationH aisle 7 sir

Steve Lapenstark