I had the same problem with clicking gears when I motorized the 8081 Extreme Cruiser. I found that putting too much weight over the differential makes the gears slip. It is probably fine to put a medium motor or IR receiver over the differential, but do not put the battery box or XL motor over it.

Hello Shreyas Udgaonkar, thx for your comment. I adapted album names but forgot to update this link. It should work again, i fixed the link, happy building!

Hi, The instructions are not available at the link you have provided. Can you please re-upload?

Hi its a good application thanks for your sharing instrc. with us

Pine L, thx for your comment. i really can not remember how long it took me to adapt it, perhaps down to one hour or so?

well i was looking at alternative ways to power it and i am going to toy around with mine and see which one i like best. i might attach it inside the cab on the axle driving the V8 engine and put the steering motor on the knob

WOW -! (OoO)/ that`s really smart ! Thanks for sharing,that really do me a favor ! By the way , how long did it take fo you to come up with this idea ?

No, the washers are not really necessary. If you do not put them in the gears still mesh, but they will skip a couple times if going full speed ahead from stand-still. I expect that if you use the speed remote control and use all the 7 in-between speed settings, the gears do not skip at all. Of course this is for a flat clean surface, in your garden the gears will grind away i guess. Happy driving!

Antoine Beauchemin: i answered this one on 1 december 2008, see below.

are the washers really necessary? if i do not put them in will the gears not mesh properly or just skip a couple times in a rotation?

If I have a OffRoader What I need for build a Offroader Remotely Controlled Technic Power Functions?

thnx mate!

Hi Sean! Sorry for the delay, been busy lately with other matters... As to your question, let's see if i can reproduce. Judging from the instructions and the hassle of inserting the washers, i think i inserted 2 washers on the right back half-axle, so not on both sides. Another washer went on the driving axis to the motor. Please study the YouTube vid too for this one. The thickness i really cannot tell, probably around a millimeter, but maybe 6 to 8 tenths of a millimeter. You'll have to try! BTW I came later to the assumption that the LEGO company designed the differential large gear this thin and hence flexible ON PURPOSE. It is better to slip gears and have one being flexible to reduce forces and wear when slipping, than to have rigid gears that slip and wear forcefully...

please respond

Do you put washers on both sides? How many washers on each side?

radek: thanks for sharing your solution, good work! That must improve steering indeed.

Siem, did you follow instructions? What *does* happen when you switch on the motor? Are your batteries strong enough? Hopefully this gives you a clue...

Sorry i ask for help this late but, I NEED HELP!!! I just can`t make it move on its own not even with a XL motor, the wheels are much too heavy, plz help me.

Hi, sorry for getting back to you after a while. You've probably figured it out yourself, but I made some photos of my solution so I can finally share them. I'm Radek1 on Brickshelf, my folder is http://www.brickshelf.com/cgi-bin/gallery.cgi?f=364207.

Radek: Thanks for your generous comments! seems to me that your solution for steering is better indeed, do you have pictures or videos to share? That is alway easier than encoding/decoding in 'pro' talk :) Also, did you include a white slip gear for protecting the motor and batteries when the steer is at its extremes? Thanks again and keep up the good work!

Jonathan: washers are important else the teeth of your differential will wear out in no-time! You will really spoil your LEGO parts that way. This is because under the large forces of the motor the parts bend just a little bit, so you need to get rid of all leeway, making the teeth of the gears really fully grip one another.

Adrian: there is only one length axle possible, and that is the one that fits. Judging from the photos it is a bit hard i admit. Counting based on the stopper ring, i come to 7L. So length 7 it should be, good luck! BTW instead of the washers, someone suggested to me to keep it all 100% LEGO, and cut off the desired length (a single millimeter or so?) from LEGO ribbed flexible tubing that can be shifted over an axle.

Adrian: From perusing the instructions: Photo Extra Parts 27+28 2 axles 5L 31 beam 9L 2 long pins H pin (="Hassenplug" pin?) 34 2 stop rings 34 2 stop rings 39 axle 9L? stop ring axle extender gear 20t 45 two 3 long axle connectors with hole 49 two grey pins axle 2L big PF motor 55 small PFmotor two pins 66 IR receiver So that is really not too much! Hoping this helps, good luck anyhow and happy building... NXTLiftBoy This @#$%!#$% editor of MOCpages ruins my nicely formatted table. Copy pasting into Word with formatting, saving as html and pastin html does not work either, just like viewing source in the browser and copy pasting that, must be just me. So there you have it, this is the list i can provide given the limits of mocpages or my ignorance to investigate...

Adrian from Ireland, apart from the offroader itself, you can consider buying the dinosaur set, as it has both motors and the remote, but if you can afford it the bulldozer is maybe better. I saw the bulldozer for 114 euro (!) at amazon.de. In my opinion buying spare parts gives you much less bang for your bucks. Good luck!

Jonathan: Washers are the rings you use with bolts and nuts, so any tool shop with metal work will do.

Apple pie: thanks! Siem: let me know if you have any difficulties, i may be able to help out, good luck! NXTLiftBoy

Very good! I`m going to try it too.

unbelievable!