Only front is driving.

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mudmagnet

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hello. need some help, when running my savage and opening the throttle, the front wheels spin and balloon only. It wont wheelie becasue the front is going so friggin fast and taking all the power. When I let it frree wheel on the stand then all wheels drive. Its like the torque bias is on th efornt only. Anyone know of a way to tune this out or repair something?
 
1st, welcome here to the forum.

2nd, start with the easy things first. check the grub screws on your rear dog bone. if you see the heads still there, take them out to make sure the screw is wholly intact & didnt bust off.
 
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Sounds like either the rear diff has gone or one of the centre rear drive cup pins/screws have sheared or fallen out, common problem, those would be the first things id check, centre rear drive cups first.

And welcome to HPISF!
 
if you see the heads still there, take them out to make sure the screw is wholly intact & didnt bust off.

+1 That caught me out once before, the head of the screw was still in there but the pin was sheared off, was going crazy trying to figure out where the carnage was lol
 
Welcome to the forum mudmagnet. You've found the best site on the net for questions and Answers in solving any problems you may have with your rc.
 
looks like your being taken care of so all thats left to do is WELCOME YOU TO THE FORUM!!
 
Welcome!

+1 on the diff's and grub screws. In my case, the second Savage I got had a blown rear diff - did almost exactly what you described. Quick way to check the diff is hold one tire still and turn the other - it should be smooth, and turn the center driveshaft as well. I got lucky - Pope talked me into buying XL diffs for my other Savage, so I had replacements on hand.

Let us know how you make out!

Bob
 

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