4wd power ratio

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rob142sti

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whats the ratio between the rampages front and rear wheels.. is it something like a 70 rear 30 front. or is it suppose to be 50/50.. because my front wheels really don't produce anywhere near the amount of power the rear wheels produce. im using 30k weight oil- bottles left over from my erevo.
 
The power delivery is equal, the Rampage doesn't have a center diff it has a center spool. Weight transfer under acceleration is making the rear seem like they are doing all the work.
 
the rampages come with a locker center diff, so you should have equal power to both front and rear diffs. how are you checking the power output front vs rear? if you are just gunning it while holding the front or rear up, the front would spin, but the rear would dig in, giving an illusion of more power. it could also be a broken pin somewhere in the front drive that only slips at higher loads. check your dogbones, wheel hub pins and possible your diff.
 
thats what i assumed - if i lift the entire truck off the ground, the front wheels will only have about half the power of the rear wheels, and i know there is nothing in the gears/brake/center dif that can affect this, because with them either its broke or its not, no in between, and i replaced my dog bone pins today with drill bit ends, so it has to be something inside my front diff, but what could possibly be wrong where the wheels still have SOME power.. could it be that my diff fluid is too heavy?
 
the front diff input cup fits on a hex, so unless it's pulled off the shaft, it won't slip. i had to replace a front diff case recently and noticed my grub screw was gone and had been gone for a while. the diff oil thickness only affect how hard/easy it is to get the 2 front tire to spin at different speeds, so that shouldn't be the problem. looks like it's time to get the diff apart, and while you are at it, temper the cups.
 
Get you some threshhold rezzies on your shocks they have rebound adjustability. This will keep the truck from staying back heavy under acceleration. Therefore give you a more even power takeoff.


As said above the center diff is solid so to improve your power it will be in your shock setup and maybe move more weight forward.


Most pipes people use on the Ramp are off to one side or end in weight. That can hurt the take off setup.
 
alright guys i checked everything over, opened everything up and still cannot figure out as to why the rear wheels seem to spin faster than the front, could it have something to do with different A,B,C,D setup? as the main gear is bigger than the last gear. to give you a reference, i get absolutely no roost from the front wheels at full throttle while the rears are throwing poop faster than Andy Pettite on a good day. while the trucks suspended in the air, the rear wheels will even balloon as to where the fronts do not.


cups were tempered before i even started the thing. i wish someone had a video of the truck off the ground, and gave it some juice.
 
It could be something in the rear diff I have had that happen to me. There may be something locking up the rear diff if there is the rear wheels will spin the same way only. It will transfer more power to the wheels that are locked . And try the same thing on the front diff hold one wheel and spin the other and see if they spin the same or opposite. Thats a easy way to tell if its a broken drive cup or pin or something locking it up. Hope this helps u....
 
if i spin one wheel, the other will spin the opposite.. same on all four.. everything seems to be working A-OK


maybe this is the way its suppose to be and im just a paranoid fool??


you guys are all getting equal power distrubution in your front and rear wheels??


if you put your truck in loose gravel/dirt, you will definitely be able to see the fronts kicking up dirt?
 
mooman007uk said:
mine all spin the same speed, wont be abcd gears or centre gears it would have to between the centre spool and the outdrives. put it on a stand and turn both rear wheels by hand and have someone hold the fronts, youu shouldn't be able to turn them, if you can then something has gone south, pin, shaft, dog bone pin or wheel hub pin
Click to expand...
wait a tick... MOO, so your saying that if i hold the front wheels the rears shouildnt be able to turn??


because i can definitly spin my rear wheels while the fronts are locked.


i knew i wasnt paranoid
 
if your rears drive independently of your fronts, and your diffs and dogbones and wheel hexes all have their pins, the only place left is in between the front and rear diff. hold the front tires, rotate the rears, and look at the front center dog bone, if it's moving, look at the diff input cup. if that's moving, look at the output cups and so on. when the motion stops, there's your problem. better yet, put a wrench on a side gear, then you test the whole drivetrain. hope this all helps, hurts to have a fellow gasser struggling.
 
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