forward is reverse?

help me someone help me. :(

If i flip them so they turn the right way they wont fit in. The 2 little bars that hold them in are at the wrong place and you can't move them like you can on the stock ones.

anyone alive out there?

calm down what kind of diff cases do you have a pic would also be helpful

[squeeforever]

what you do is switch the front diff to the rear and the rear to the front if you are not using hybrids.

Originally Posted by boss 302

calm down what kind of diff cases do you have a pic would also be helpful

Like i said it my very first post UE.

Originally Posted by squeeforever

what you do is switch the front diff to the rear and the rear to the front if you are not using hybrids.

I did that and it still did not work. :(

Originally Posted by Chris911

Like i said it my very first post UE.

all you said was that you installed the 8 spider diffs i didnt know if you had the hybrids anywho i think you should be able to rebuild the diffs and put the ring gear opposite to were it is now

[Sylvester]

Chris, just flip that little brace that is giving you troubles, i had the same problem, but i flipped the little brace thingy and it fit:)

Originally Posted by Sylvester

Chris, just flip that little brace that is giving you troubles, i had the same problem, but i flipped the little brace thingy and it fit:)

They wont flip like the stock ones will. Guess i have to open them up.

Originally Posted by Sylvester

Chris, just flip that little brace that is giving you troubles, i had the same problem, but i flipped the little brace thingy and it fit:)

im pretty sure he said the brace wouldnt flip but if it would it would make it a lot easier on him but like i said i think putting the ring gear on the opposite side that it is on right now would work

[Mike.L]

have you tried anything with the wires or your controller??

[Papa]

You have the diffs in the cases backwards, left to right. You need to open up each diff case and flip the differential ring gear so that it rides on the opposite side of the case. T maxx and emaxx run in opposite directions and the ring gear will be pced on either side depending on your application. If all else fails read the manual!http://www.unlimitedengineering.com/...nsV1.1-Web.pdf


3.3.2. Ring gear to pinion setup. You will now setup the ring and pinion. You will do
this by moving shims from side to side on the carrier, and by adjusting the amount of
shims on the pinion which will adjust the pinion depth.
3.3.2.1. Begin with two of the .010” shims on the pinion shaft, then install the 2
bearings, slip it down into the housing and put the pinion drive cup on, gently
squeeze them together as you snug up the M5x5 SHSS (Socket Head Set Screw).
3.3.2.2. Set the ring gear (with shims and bearings) down inside one of the case halves.
The inside of the cases have been marked with an “N” for ‘Nitro” and an “E” for
‘Electric.’ You will put the ring gear on the side that is correct for your application.
The reason for this is that by putting the ring gear on one side or the other it will reverse the direction of
rotation for the input shaft for the same output direction (forward motion of the truck.) The pinion for Nitro
trucks rotate one direction and Electrics rotate the other, therefore it is necessary to install the ring gear
on the correct side for your application. If you don’t, the truck will go backwards when it should be going
forward.
3.3.2.3. Set the pinion assembly down in the case, put the other case on and close it up.
Gently squeeze the cases again like you did when setting up the carrier. Close this
up evenly, remember these are high precision cases, getting them cocked like in this
picture can damage the seating areas.
3.3.2.4. Spin the pinion. Feel for free, smooth motion. You will probably not get it as
this setup is usually too tight.
3.3.2.5. Since this is usually an interference setup, but gives you a good starting point,
remove one of the .010” shims on the pinion shaft and try
again. When you go to reassembly, hold the carrier in the
housing perpendicular and look for a small gap between
the end of the pinion and the body of the carrier. You do
want a small gap here.
3.3.2.6. Check for free movement. It is normal for one spot
in the rotation to be slightly tighter than the rest as no
ring and pinion no matter how precision is perfect, you
are shimming for NO tight spots w/o having excessive
backlash.
3.3.2.7. Now comes the tricky part, you must decide to take
either shims out on the pinion or transfer them from one
side to the other on the carrier. Try to do this in balance,
neither shifting the carrier too far nor the pinion too far.
I normally fi nd that in the end I have between .005”
and .010” shims on the pinion and .010”-.020” more
shims on the carrier side than the ring gear side. Pay
attention to what your ears are telling you as you go
through this process. When you get it, even the ‘sound’
will be nicer, motion will be smooth, and backlash will be
minimal.
3.3.2.8. Add the case screws and check again. The fi nal
squeeze down of the screws may affect what you’ve
done so far, in which case you’ll need to do a little more
shimming.
3.3.2.9. Remove the pinion set screw, apply Red Loctite to it
and reinstall. TIGHTEN. While I normally caution people
not to overdo it with fasteners you MUST make sure you
get this one good and tight. Some guys will even go so
far as to take a small drill bit and spot face the pinion
shaft where the set screw will seat. The jury is still out on
the usefulness and wisdom of this modifi cation.
3.3.2.10. Leave assembled for now. You will install the
output shafts before disassembly so you cannot lose the
shims or the location of the shims.
Some potential mistakes:
Not counting correctly when moving or exchanging shims.
Not having the bearings fully seated in their pockets
Not installing the pinion drive cup consistently.
Take your time on this step. A good setup only needs be
done once as long as you are consistent in the way you
assemble the gears.

[HotnCold]

What papa posted is correct - by flipping the diffs - not switching front to rear - should do it - and pics ( if possible ) would help also...

[MonsterMaxx]

You cannot simply 'flip the diffs' like you could with stock housings and turn the support collar around because the support posts are a part of the housing.

As the above user notes you did not read and/or follow the instructions. It's pretty clear in there that if you have a Nitro that you put the ring gear on the side of the case with the large 'N' engraved in it. If you have an electric you put the ring gear on the side with a large 'E' engraved in it.

At this point you have assembled it with the ring gear on the 'N' side which is why it goes backwards in your 'E'lectric vehicle.

You 'may' be able to simply turn the carrier around inside the case, however this will likely cause you to do the setup again,,,which may be a good thing. Since you didn't read/follow the instructions on a major point like which side to install the ring gear on, chances are you didn't follow some of the finer points as well.
There's lots of good info in those instructions, please read them.

I'm not bashing on you, we've all been there. Opened up a new gee-wizz and put it together without ever considering [instrustions] and thereby done it wrong.
Don't worry, reading the instructions won't make you any less of a man.:002: