Broken Tranny.?

[Rivas Concepts]

I bought the Tf2 from first batch that came out. When I built it I feel I had tranny servo adjusted properly, but the truck still popped out of gear. I adjusted it several times and seems no matter what it still pops out of gear. Yesterday while climbing with it went into a free roll backwards. I shifted gears when it stopped and nothing, shift again and nothing. Bringing it home and I still get nothing. Disconnected servo all together and drive train spins freely. If upside down with no weight on drive train throttle it and it spins very slow but if I touch the wheel it stops and motor keeps going. The spur gear spins and the center screw with spring does not. Before I tear into this tranny does anyone have any idea what is going on.? Anybody else experience this.?

 

[turbomini]

did the slipper come lose? if you spin the wheels does the spring and bolt spin?

 

[Grumpster1980]

Check the slipper clutch and if that is okay check the drive shafts and if that is okay then open up the tranny.

 

[Rivas Concepts]

did the slipper come lose? if you spin the wheels does the spring and bolt spin?

If I spin the wheels the spring and bolt do spin, but the bolt and spring havent backed off any.

 

[Rivas Concepts]

Check the slipper clutch and if that is okay check the drive shafts and if that is okay then open up the tranny.

Slipper is still tight and all drive shafts are tight and spin with wheels.

 

[northernerbill]

Well theres only one answer surely? Take the transmission out and inspect it.

Once your in its fairly basic in how it works. You have two gears.

On the faces of these two gears are 3 recesses circling each gear.

The two gears are seperated by about say 15-20mm

When you shift gear you slide a two sided pin into either of the 2 gears 3 recesses.

The slop you normally feel is the pin being allowed to circumnavigate the recess it has been pushed into.

So either you have sheered off those pins or the internal circlips have come loose/off and don't force the pin arm fully over into either gear face.

So strip and see"thumbsup"

 

[Erbing]

Looks like you have to tear it down if the slipper is still tight. Do you hear any loose parts when its spinning?

 

[The_Green_Mennie]

tear it apart and watch out for the small e-clips on the shifting rod. I had a similar problem and it had tossed one of theses e-clips from the shifting rod.
Good luck

 

[ROCKEDUP RICKY]

motor pinion

 

[Rivas Concepts]

Looks like you have to tear it down if the slipper is still tight. Do you hear any loose parts when its spinning?

If I hold the trigger after a few seconds it makes an ugly sqeeking sound but I dont want to do it again. I dont want to damage it anymore.

tear it apart and watch out for the small e-clips on the shifting rod. I had a similar problem and it had tossed one of theses e-clips from the shifting rod.
Good luck

Yea I am not looking forward to opening the tranny, at all. The shifter is smooth and actually moves on its own. If I hold truck by back vertical the plunger will fall toward the front and same if I hold by front, plunger falls to back.

motor pinion

Motor pinon.? Whats that entail.?

 

[symplyrc]

If the input shaft does not spin but the slipper clutch assembly does when you apply the throttle I would check the small cross pin in the input shaft the slipper clutch and spur gear lock on to. Pull the nut and spring off the input shaft and slide the slipper clutch off to get to the pin that's in the shaft, you'll see a notch machined into the back of the clutch hub that the pin fits into just like the pins on the wheel hexes. I bet the noise you hear is the clutch rubbing the transmission housing.

 

[northernerbill]

Omg. Motor pinion, means check your pinion (the small gear attached to your motor) is fastened tight as it could be your motors shaft is spinning inside if the grub screw is partially loose.

It will take you 1 hour to have the trans out, apart, inspected and potentially fixed. Would be a good time to get to know how it works and also grease up again if required.

Now just crack on and do it I would say.

 

[northernerbill]

And our survey said?

Any word on what it was?

 

[Jeepfixer1]

If the input shaft does not spin but the slipper clutch assembly does when you apply the throttle I would check the small cross pin in the input shaft the slipper clutch and spur gear lock on to. Pull the nut and spring off the input shaft and slide the slipper clutch off to get to the pin that's in the shaft, you'll see a notch machined into the back of the clutch hub that the pin fits into just like the pins on the wheel hexes. I bet the noise you hear is the clutch rubbing the transmission housing.

This sounds like your problem! I don't think you need to pull your tranny apart.