conchp Posted January 27, 2015 Share Posted January 27, 2015 Okay so i just took my savage flux out, after 10-20 mins i encountered a problem with the truck. As i pressed the throttle in the front wheels where ballooning, the back 2 where not. The front was fast but getting no traction to move so although the wheels where spinning fast enough to balloon they just didn't move the truck and did more of a burnout than anything, the back wheels just seemed to be trailing along. When in reverse the truck was normal as if the truck was fine. I brought the truck back to me to look. When the wheels are off the ground ALL 4 move. When REAR wheels only on the ground and throttle is pressed the front wheels move only and the truck does not move. When the FRONT wheels are on the ground only, the truck does pull and try to move. Please help i hope iv given enough info for someone to know what the problem is any help would be much appreciated Quote Link to comment Share on other sites More sharing options...
jordan_bench10 Posted January 27, 2015 Share Posted January 27, 2015 Check your grub screws on the rear driveshaft 1 Quote Link to comment Share on other sites More sharing options...
jordan_bench10 Posted January 27, 2015 Share Posted January 27, 2015 Failing this strip the rear down check diff internal gears and the outside pinion and crown also i guarantee if the grub / driveshaft isnt your issue then its in here 1 Quote Link to comment Share on other sites More sharing options...
conchp Posted January 27, 2015 Author Share Posted January 27, 2015 well ive stripped it down and the diff is fine looks perfect and is the grub screw the screw where the drive shaft dog bone or whatever fits in? if so ive tightend it still no luckk ? Quote Link to comment Share on other sites More sharing options...
sean-vrs Posted January 27, 2015 Share Posted January 27, 2015 Time to upload some pictures mate, would help fault find 10 fold. 1 Quote Link to comment Share on other sites More sharing options...
conchp Posted January 27, 2015 Author Share Posted January 27, 2015 also it went normal for a split second then back to front wheels Quote Link to comment Share on other sites More sharing options...
tingtong333 Posted January 27, 2015 Share Posted January 27, 2015 Try tightening the slipper clutch 1 Quote Link to comment Share on other sites More sharing options...
Tug Posted January 27, 2015 Share Posted January 27, 2015 I did post on this, but it's gone now. I reckon you're looking for a lost grub screw, possibly on the output drive-cup from the gearbox or the drive-cup that feeds the rear diff. Failing those two options, you'll need to strip and inspect the rear end. If you're new to that, keep your exploded drawings handy. 1 Quote Link to comment Share on other sites More sharing options...
Wrighty8766 Posted January 27, 2015 Share Posted January 27, 2015 Could also be something as simple as a stripped wheel hex, or a snapped pin inside the hex. Best thing to do is follow the drivetrain back to where it stops working and inspect the fault 1 Quote Link to comment Share on other sites More sharing options...
conchp Posted January 27, 2015 Author Share Posted January 27, 2015 ok guys so ive looked again the back wheels spin freely, and dont move the diff or whatever,so it seems its in the centre where the 2 wishbone things meet at the back that are conneceted to the hub ? not the 2 near the diff how whould i sort this Quote Link to comment Share on other sites More sharing options...
sean-vrs Posted January 27, 2015 Share Posted January 27, 2015 ok guys so ive looked again the back wheels spin freely, and dont move the diff or whatever,so it seems its in the centre where the 2 wishbone things meet at the back that are conneceted to the hub ? not the 2 near the diff how whould i sort this Have you checked the Hex inserts as stated above this is a typical symptom Quote Link to comment Share on other sites More sharing options...
Wrighty8766 Posted January 27, 2015 Share Posted January 27, 2015 ok guys so ive looked again the back wheels spin freely, and dont move the diff or whatever,so it seems its in the centre where the 2 wishbone things meet at the back that are conneceted to the hub ? not the 2 near the diff how whould i sort this So are you saying that the back wheels spin bud don't spin the driveshafts that lead to the rear diff? 1 Quote Link to comment Share on other sites More sharing options...
conchp Posted January 27, 2015 Author Share Posted January 27, 2015 the back wheels spin freely and the drive shafts spin that iss all that happens, no movement anywhere else, wheras id i move the front wheel the drive shafts spin then go to the diff witch moves ect all normal Quote Link to comment Share on other sites More sharing options...
conchp Posted January 27, 2015 Author Share Posted January 27, 2015 anyone know what i should do Quote Link to comment Share on other sites More sharing options...
Tug Posted January 27, 2015 Share Posted January 27, 2015 Sounds like a borked diff, you sure you removed it to inspect it? Have you smashed a drive-cup? Quote Link to comment Share on other sites More sharing options...
Wrighty8766 Posted January 27, 2015 Share Posted January 27, 2015 Strip the rear diff down and inspect it for missing/worn teeth, check the 9t input gear is intact, also check the internals that they are all ok and check the pins that hold the out drives in place Quote Link to comment Share on other sites More sharing options...
DannyP Posted January 27, 2015 Share Posted January 27, 2015 Rear diff drive pin under the sun gear? Does the rear diff sound crunchy at all? When you spin one rear wheel? You need to open it up really and check the internals. Quote Link to comment Share on other sites More sharing options...
conchp Posted January 27, 2015 Author Share Posted January 27, 2015 yes it does sound like that what should i do? Quote Link to comment Share on other sites More sharing options...
DannyP Posted January 27, 2015 Share Posted January 27, 2015 (edited) Take the rear diff out and remove the screws holding the ring gear on. Be careful not to strip the heads on the screws. Make sure you get a snug fitting screw driver and apply a little heat to the diff case(if they are alloy, should be)in line with the screw you are removing. It will soften the threadlock on the screw and make it easier to remove. Once you have all the screws out, check the internal gears and drive pins for damage. While the diff is out check the pinion gear that is inside the bulkhead for damage. Post pics and let us know how you get on. Edited January 27, 2015 by DannyP 1 Quote Link to comment Share on other sites More sharing options...
conchp Posted January 29, 2015 Author Share Posted January 29, 2015 well stripped the rear end today, no teeth missing, pins on sun gear ect all intact only thing was the 4 screws loose, put it all back together and tested and all seems good, everything on the drive train is goes no loose or missing screws or broken cups, just see how it goes in the next few runs, thanks for the help guys Quote Link to comment Share on other sites More sharing options...
DannyP Posted January 29, 2015 Share Posted January 29, 2015 Glad you got it sorted 1 Quote Link to comment Share on other sites More sharing options...
Tug Posted January 29, 2015 Share Posted January 29, 2015 If the four crown gear screws were loose, the sun gear could've lifted away from the spider gears. 1 Quote Link to comment Share on other sites More sharing options...
conchp Posted January 29, 2015 Author Share Posted January 29, 2015 Glad you got it sorted thanks your post was a big help 1 Quote Link to comment Share on other sites More sharing options...
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