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savage x 4.6 second gear

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motox

RC Newbie
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Location
northern pa
RC Driving Style
  1. Bashing
my savage 4.6 won't shift into 2nd gear. what could be the problem. it worked fine the last time i used it, now it doesn't wanna shift. thanks
 
i don't know a lot about them,i am a noob, but what i would try is watch that DVD that came with your truck. it has a section in there on how to adjust the tranny, try that.:juggle:
 
Does the engine seem to be running cleanly throughout the entire RPM range?

If so, check to see if your slipper loosened up on you. If the slipper nut backs off, the slipper pad wears or a glaze builds up on the slipper, it will cause the power transfer to be lost to the trans when it tries to shift into second.

To test it, you can raise the truck in the air and slowly apply throttle. Without a load on the engine other than the tires/drivetrain, a loose/slippery slipper should still transfer enough torque to get it to shift.
 
slipper

now the dam slipper on the spur gear keeps burning up wears the paper backing right out. i have put about 4 new spurs and new paper backing on. i even kranked the lock nut down tight.
 
The first time that i had that problem, i was too rich. BTW i wouldn't tighten the slipper all the way, you risk breaking something else in your drivetrain or in your transmission.
 
I ran my slippers locked down for years, they still slip too much.
You have either one or both of the below problems.
One you need to lightly sand the slipper disc, the metal one. Remove all the burnt, glazed slipper pad material.
The other problem is your locknut for the slipper is not staying tight. The nyloc insert wears out and they ever so slowly back off.
Replace the nut or use Red loctite on it and allow it to dry for at least 4 hours.
Do not overtighten the slipper, just tighten it until all the coils of the spring are compressed and stop there. If you overtighten it it will warp and burn up the spur.
 
now the dam slipper on the spur gear keeps burning up wears the paper backing right out. i have put about 4 new spurs and new paper backing on. i even kranked the lock nut down tight.

So... does it shift into second now?

One you need to lightly sand the slipper disc, the metal one. Remove all the burnt, glazed slipper pad material.

Do not overtighten the slipper, just tighten it until all the coils of the spring are compressed and stop there. If you overtighten it it will warp and burn up the spur.

Thanks for the tips. I did that last time I installed my spur, sanded the washer a bit, cleaned it with DA and roughed up the pad a bit. It still slipped when it shifted into 3rd. So, at the first sign if slip, I cranked the nut down about 1/8th turn past when the spring compressed and it seems to have helped a lot. I also replaced the bushing in the center of the spur with a bearing to avoid any heat transfer from that. I cleaned the bearing out real well to remove the oil/grease in it first.

I'm wondering if maybe gearing back down for less speed may help. It will give me more wheelies than I care for, but the torque may not be as harsh on the slipper since it won't be fighting rotational mass so bad getting it rolling at the "slower" speed? I was only thinking of dropping from 47/16 to 49/16 as I have a spare 49T spur.
 
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