First Shafty, Tans skipping?

[Cr4wl3r]

The pin holding the slipper is ok, saw it last night while checking the trans.
Rear axle pinon can be spun very easily and spins for a few seconds after letting go. the front spins but stop immediately after i let go and feels a little stiffer.
It's only a few weeks old only been on the trail twice maybe 6 hours total runtime

opening up the front right now see whats going on...

[Cr4wl3r]

Aahhh there is a gremlin hiding somewhere in here and i cant find him!

Front axle is open and gears look great, locker seems to be fine holding tight, axle rods are nice and straight, grease was on the gears, no dirt, rust, or missing screws.

....im stumped. don't know what else except motor

[Johnnysplits]

Have you tried removing the pinion from the motor and turning the spur by hand with everything else installed?

[Cr4wl3r]

Removed the pinon from the motor everything else hooked up, pushed it by hand back and forth on hard floor and could still feel the hopping, disconnected the rear drive shaft and pushed it back and forth still could feel it. disconnected front drive shaft pushed it back and forth still felt it.

So after searching the hole vehicle it lead me to believe it was back in the tranny somewhere, just opened it up again and everything is in great working order.
putting it back together and if it drives and climbs the rocks in the yard then guess im done till it breaks...idk really strange

[Cr4wl3r]

Put it all back together and this is the result video still performs
SCX10 Test after rebuilding - YouTube

Brought her back in and took the body off, played with the throttle a min and notice a slight wobble in the spur gear got a video of it.
Spur Gear Wobble - YouTube

[Johnnysplits]

Originally Posted by Cr4wl3r

if it drives and climbs the rocks in the yard then guess im done till it breaks

That's your best bet. That little bit of wobble the spur has in nothing...I wouldn't worry about it.

[Johnnysplits]

Originally Posted by Cr4wl3r

Removed the pinon from the motor everything else hooked up, pushed it by hand back and forth on hard floor and could still feel the hopping, disconnected the rear drive shaft and pushed it back and forth still could feel it. disconnected front drive shaft pushed it back and forth still felt it.

So after searching the hole vehicle it lead me to believe it was back in the tranny somewhere, just opened it up again and everything is in great working order.
putting it back together and if it drives and climbs the rocks in the yard then guess im done till it breaks...idk really strange

If you still felt it with no pinion and no driveshafts, it's not in the tranny. It's in one of the axles. Maybe the pinions need to be shimmed.

[Louisbaby]

Originally Posted by Johnnysplits

If you still felt it with no pinion and no driveshafts, it's not in the tranny. It's in one of the axles. Maybe the pinions need to be shimmed.

I agree with you. It must be one of the axles.

[Cr4wl3r]

With no motor and no drive shaft i cant feel anything it seems smooth. but once you hook up a drive shaft, does not matter front or rear or different drive shafts it still wobbles.

going to get some washer and shim behind the slipper plate. when i can gonna pick up a bearing kit. maybe a bearing has gone bad in the trans.

Going to open the rear axle but it seems more fluent than the front so...
Do i shim the pinons from inside the axle housing?

[pickled]

yeah take the pinion out put a shim behind the gear and slide it back into the bearing

[T_A]

On my Rubicon it also skips - but only when you hold it in the air and not while in the field
i think its normal and as something to do with the build in slope in the drivetrain
(the same thing kept happening after i changed to MIPs and universals and new wheels/hexes)

[Cr4wl3r]

How many washers should i shim behind the pinion?

[pigblanket]

I sheared the locking ears off my iron cross locker. I thought it was the trans skipping for a long time. It would skip in a bind.

[Cr4wl3r]

As far as the front goes the locker was in great shape, i've yet to open the rear axle but its never presented a problem in the rear, will be opening it anyways soon.
When i open the rear should i go ahead a shim that pinion too?

Going to shim the slipper plate and go ahead and get the metal gears from Robinson Racing, cuz i feel like the gears are going to go at some point because of this issue.

[Cr4wl3r]

Shimmed behind slipper plate, reduced the wobble in the spur but didn't fix the problem.
Removed the rear axle and rolled her back and forth with everything else hooked up problem still there.

Opened up the rear axle anyways just to inspect things. Everything was in good shape...

Soo gonna get fast eddy bearing kit and Robinson gears and see if that fixes it

[Johnnysplits]

What happened to "just use it until something breaks"? You're chasing a gremlin man...let it go. Wait till something breaks.

[Cr4wl3r]

ya your right, its just aggravating. gonna take it to the trails Sunday and really put it to the test, see how it does.

[Louisbaby]

Drive it like you stole it. Ignore the gremlin for now... Lol


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[nissan_driver24]

I'm not sure if you fixed your problem but after reading everything that you posted I'm pretty sure your problem is because of the lift you did on this rig. The driveline pinion angle looks fine but it's the driveline angle by the transmission front and rear look too steep. If you take off the lift kits part and install the shocks in it's stock location and the sound and binding goes away then you would have found your problem. The Axial WB8 drivelines tend to have the same problem you are encountering when pushed past it's limits.

An easy fix and what I would recommend fix would be to get a set of MIP driveline they are much more durable and can handle a more steep driveline angle.

Hopefully this all help.

[blknslvr]

Agreed with above post. ^^^^

But also the way I am understanding your post here. The raise mark should line up with the other driveshaft not the pin on the joint. If that make sense? It sounds like from your discription the driveshafts are installed with the weight lining up and not counter balancing itself. Hence the reason for the marks on the shafts

Originally Posted by Cr4wl3r

looks like its lined up, the tiny raised line in the plastic at each shaft end is lined up with the pins, removed dust cover, spur and pinon look good no objects loged or teeth broken, all grubs still in, mesh seemed a little to tight back it off a tad slipper is tight.

put wheels back on and still jumpy. flipped her upside down and tested it and its located somewhere in the front end, rear axle and drive shaft seem to be operating fine.

going to pull the lift off tomorrow and see if that does anything... if not guess i gotta open the front axle