Spur Gear

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chances are the upper rear arm is flexing into the spur. get a set of alloy uppers.

or is it the spur carrier? that should be alloy a well
 
i don't think its the upper thats hitting the pinion gear because i put a plastic cover on it i think its more likely the spur gear itself is the weak part being plastic. do you guys recommend a metal spur gear? but i worry if i go metal something else well cause another drivetrain issue
 
The only problem I had was with the layshaft gear due to a cracked engine mount allowing the engine to shift forward slightly. I am running a metal 16t spur with a plastic 48t and have no issues with this setup.
 
pipeous said:
look close. that rod is awful close to the gear. it doesn't take much once one tooth folds over
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as pipe says mate check close, mine stripped a gear doin cart wheels as the rear wheel was flexin under the presure of the flip the rear upper arm hit the gear and took a couple of teeth, just enough for it to slip and reck the rest :nono:
 
this occured also when im just using the truck on the pavement no jumping just speed passes and i do noticed the rear upper arm being to close that is why i put the gear cover
 
rixxer said:
this occured also when im just using the truck on the pavement no jumping just speed passes and i do noticed the rear upper arm being to close that is why i put the gear cover
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have you checked to see if the rear brakes binding? or the gear mesh is too tight? i had it where my large engine mount was out slightly and caused the lay shaft to sit crooked which made the pinion and spur gears sit too tight and that stripped the teeth on my spur :nono: just a couple of hings to check bud :cool2:
 
after upgrading to metal pinion gears ive gone thru 2 full tanks without breaking them knock on wood :-).. now im beginning to enjoy this truck but now the body is beginning the sign to go oh well bash it until its destroy
 
You were running a plastic pinion? Or did you upgrade to an alloy spur?

Just go alloy and stop the problems.

Alloy upper arms do nothing for the flex. The alloy upper arms are needed because the arms flex and the plastic ones crack. You still need the upgrade but its because the stockers will crack eventually.

rixxer said:
this occured also when im just using the truck on the pavement no jumping just speed passes and i do noticed the rear upper arm being to close that is why i put the gear cover
Click to expand...

The gear cover has a cut out on the back side so it will clear the arm. That is where the arm is hitting the a arm rod.
If you upgraded to an alloy spur just keep an eye on the a arm rod and you will see where your rod is hitting your alloy gear.;)
 
im running metal to metal pinion gears now and so far so good 2 weekends of run time no spur issue hopefully stays this way :-).. the upper rear alloy arm and alloy gear on order
 
Silly question time!
Are you certain the metal spur is dimensionally identical to the plastic ones you were fitting?
I certainly support the metal supporters, but if the strength of one part is increased, it will only be passed onto somewhere else, if there was / is a problem.
I hope it is perfect from now on, but .... :)
 
spur

i geared it high to minimized the tourqe output now running 18/46 metals i understand the concern i know if i strenthen one area it also weaken other part but for now its running ok no gear problem so im satisfied with the improvement
 
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