Philpp Posted March 16, 2019 Posted March 16, 2019 Hi, after my dark ages lasted sine 1989 I started collecting old Technic sets a short time ago, then I gave the new Lego Technic a try with some small Sets (420063, 420079, 420094). A few day´s ago I got a brand new 420069, built it and I´m really amazed with it for the following reasons: AFAIK it´s the first with realistic live axle suspension Reintroducing Ackermann steering after a very very long time Combining studless and studed parts, although studed is only used for styling. Also the winch is done nicely and the camping roof is a cool feature. I think it´s a highly customized Toyota Landcruiser J70´series, or maybe a J80, a HZJ105, a Nissan Patrol or a Chevy Blazer or a similar US offroad car. I like the tracks for winter, but I ordered parts at BL to change it to wheels according to a Youtube video. I choose the large yellow rims with tractor tires like in 420070 or 420081 (I like the yelow / purple contrast, but you can have it cheaper with black/grey rims and other tires) If somebody is interested I can post the YT link! To make it as realistic as possible I want to add a lockable center diff. I tried to simple add the standard 28 tooth diff underneath the red 16-theeth freewheeling gear of the original drivetrain, but I found out that this doesn´t connect to the diff´s thooth. So I tried all available (to me, with the sets I ´ve mentioned, but also with online info) gears, and found out that it´s not possible to make a diff with the 16-th clutch input gear coaxial from above as needed in the original set to route the steering (also not with the blue 20-th)! So I think about completly reworking the steering to add a lockable center diff for which I came up with a solution combining Ari Holopainen (Lugnet) and Sariel´s technics, and the 24-16 diff (which I still have to order). But I still don´t know how to exacty fit it inside the given space! Maybe also adding a gearbox, a 5 speed + R would be the goal but a simpe 4 or even 2 speed (mimicking a offroad hi/low box) would do. I´ll try to post pictures of what I´m trying to say in the next days Has anyone already tried to add a center diff, or is interested to find solutions for a realistic drivetrain? I think with gearbox and lockable center diff this would be a true "supercar"! Quote
Philpp Posted March 17, 2019 Author Posted March 17, 2019 (edited) To correct my mistakes: Somehow there got a 0 too much in the set numbers, sorry. Also the black rims are of course not cheaper than the yellow ones, but the grey and red ones are (at the moment an BL) . I built a lockable middle diff with the 28th diff, but I didn´t fit it to the vehicle. It´s using too much space compared with what would be possible using the 24-16 diff. Correct me if I´m wrong: I see no way to build a middle diff using the 28th with a coaxial input ( coaxial regarding the axis of the two diff outputs ) with the existing gears. Also the locking mechanism uses too much space because it needs it´s own axle if the input is at 90 degrees instead of being coaxial. Perfect solution in my opinion would be: In this picture, imagine to substitute everything on the middle (back output and input as described in the picture) axles that sits between the two tech bricks (2x DBG 16th clutch gear, the planetary arrangement with 24th crown and the L(B)G 16th gear at the right side) with the 24-16th diff, placing the 16th-end at the left side, and to swap front output and input (placing the clutch either on input or front output) ! What do you think? Maybe the diff lock could be connected to the fake gearbox shifting lever of the original set, that would be really cool. Unfortunately the BL store where I put the (still open) order for the for the wheels conversion doesn´t have the 24-16 diff. So I´ll delay the diff/gearbox mod, just doing the wheels conversion, because I need to save money! Bought a 8480 spaceshuttle with complete box in like new condition (exept electric cables)! As I´m still keen to finish this project and being still a newby to "the new Technic", could someone give me tipps of how to get and use LDD? Thanks! Edited March 17, 2019 by Philpp Quote
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