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Tamiya TRF 801XT Build Thread

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Tamiya TRF 801XT Build Thread

Old 10-21-2010, 12:04 PM
  #51  
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Default RE: Tamiya TRF 801XT Build Thread


ORIGINAL: Eman77

You might be right - can you link to that conversion for reference? Should be an interesting comparison.

Here's a couple shots of the front hubs/carriers/whatchacallits. Seem pretty durable!
I heard that the buggy steering hubs on the XT makes turn in alot better but I have not ran mine yet so I wouldnt know, I hope its nothing like the Nitrage, I mean if your bashing its fine but if you put it on the track its like an overgrown donkey on steroids
Old 10-21-2010, 01:34 PM
  #52  
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Default RE: Tamiya TRF 801XT Build Thread

Well, the buggy ones are nice and shiny - but both are metal. Just not sure what the xt ones are made of (buggy ones are blue, so anodized alum I imagine). Maybe the size/shape difference (if any?) makes it handle better.

Anyway, I'll just be bashing, so I'm fine with stock. I think I will take the advice of some guys here though, and go with the narrower buggy/truggy type tires instead of big fat MT ones though, so it's a bit more nimble.

In other news, the electric conversion kit has been shipped today - should get it by Monday. Looking forward to that! You heard about yours yet?
Old 10-21-2010, 02:26 PM
  #53  
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Default RE: Tamiya TRF 801XT Build Thread

it looks bulletproof! [X(]
Old 10-21-2010, 02:52 PM
  #54  
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Default RE: Tamiya TRF 801XT Build Thread

I like the fact that there are metal clamps around the input shaft bearing, the one that goes into the diff housing. My E-Savage had issues where, under big power (and traction), that housing around the bearing would flex under torque, causing the input pinion to skip against the diff ring gear. It was nasty sounding. This should take care of that.
Old 10-21-2010, 03:23 PM
  #55  
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Default RE: Tamiya TRF 801XT Build Thread

The buggy was designed after the truggy has come out. A lot of the improvements were included in stock form. For example better knuckles (durability + handling,) angled engine mount, etc. There are actually a significant amount of different parts between the cars. Unfortunately this means annoyances like the same bump box setup won’t work for both cars…..

As for that diff ring, it’s very similar in design to the TNX monster truck diff ring. Unfortunately it is a cast piece, and quite a few people have reported cracked parts. A new machined part is out now as an upgrade.
Old 10-21-2010, 04:32 PM
  #56  
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Default RE: Tamiya TRF 801XT Build Thread

Interesting info. Sad outdated TRF 801XT w/out updated parts is sad. Very sad.

I guess if anything breaks, I know where to start hunting for upgrades.
Old 10-21-2010, 11:22 PM
  #57  
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Default RE: Tamiya TRF 801XT Build Thread

I guess the previous owner for mine did all the upgrades which Im grateful for, I have no word on my conversion yet[:@]
Old 10-22-2010, 11:20 PM
  #58  
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Default RE: Tamiya TRF 801XT Build Thread

Nice to have all those upgrades!

Onward on the build: Here's the center differential being put together. Very, very similar to front/rear diffs. Truggies use center diffs, and not a transmission. I'm not sure why.
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Old 10-22-2010, 11:24 PM
  #59  
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Default RE: Tamiya TRF 801XT Build Thread

And here I am slapping the center diff on the chassis. Notice the motor plates I put on for no good reason, as well as the brake rotors (?) alongside the center diff. My electric conversion kit hasn't arrived yet, so I really have no clue what I'll be taking off, putting on here. Thus, my build will be a bit sketchy in those areas for now. I might just not do much more around the motor/center diff area, and just focus on other areas for now.
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Old 10-22-2010, 11:29 PM
  #60  
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Default RE: Tamiya TRF 801XT Build Thread

Moving on to the shocks build for now. Here are most of the parts I'll be using, in the first pic. I thought I'd take a pic of all the parts I'd be using, but I goofed and didn't get them all - and you poor readers suffer. *tsk tsk*

Anyway, notice the rubber booties for the shocks to keep grit out of 'em, and the green slime I'll be using. Oooh yeah, green slime!

Second pic is the parts involved with building a single shock. Fun, fun!
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Old 10-22-2010, 11:34 PM
  #61  
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Default RE: Tamiya TRF 801XT Build Thread

Remember e-clips when building shocks? They are the devil's work, slipping out of needle nose pliers and flying across the room amidst the loud swearing of the RC kit builder, not to be found until 6 months later when you're looking for a 1mm shim you dropped.

Alas, the TRF 801XT kit does NOT use e-clips in the shock build. The piston disc inside the shock body has a depression in it, and rests neatly on the shock shaft. A tiny screw (and tiny lock washer) hold it in place Ingenious! Why don't all shock kits do this? Sadistic [email protected]#[email protected]#!'s.
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Old 10-22-2010, 11:37 PM
  #62  
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Default RE: Tamiya TRF 801XT Build Thread

And here is a shock comparison. Shown is a front Durga (DB01) shock compared to an 801XT front shock, and a few rears. The truggy shocks are massive in comparison. It's most impressive.

I show pics of a build front and rear 801XT shock without the rubber booty to cover the shock shaft, and one rear with the booty. Shock build was one of the easiest I've ever done.
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Old 10-22-2010, 11:40 PM
  #63  
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Default RE: Tamiya TRF 801XT Build Thread

Time to move on to the steering build I guess. After putting a few parts together, I found this interesting - the spring for the servo saver is pretty stout. Somehow I've got to thread that adjustable blue alum ring down over the blue alum tube by compressing that stout spring by hand while I try to engage the threads. Good luck!
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Old 10-22-2010, 11:42 PM
  #64  
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Default RE: Tamiya TRF 801XT Build Thread

First pic is a scattering of steering parts involved.

Somehow, I Got R Done, and here is a second pic of the steering assembly put together, but not on the chassis yet. It's very smooth. Bearings FTW.
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Old 10-23-2010, 01:21 PM
  #65  
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Default RE: Tamiya TRF 801XT Build Thread


ORIGINAL: Eman77

Remember e-clips when building shocks? They are the devil's work, slipping out of needle nose pliers and flying across the room amidst the loud swearing of the RC kit builder, not to be found until 6 months later when you're looking for a 1mm shim you dropped.

Alas, the TRF 801XT kit does NOT use e-clips in the shock build. The piston disc inside the shock body has a depression in it, and rests neatly on the shock shaft. A tiny screw (and tiny lock washer) hold it in place Ingenious! Why don't all shock kits do this? Sadistic [email protected]#[email protected]#!'s.

Ive read a review that this screw backs out and you should add thread lock to it, I used tread lock when I rebuilt them.
Old 10-23-2010, 01:24 PM
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Default RE: Tamiya TRF 801XT Build Thread

BTW what pinion are you going to use?
Old 10-24-2010, 05:37 AM
  #67  
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Default RE: Tamiya TRF 801XT Build Thread

I received my conversion kit yesterday (the post man left it out by my garage[&:]) I wont steal your thread but you asked how far can you go on the build before you omit stuff for the conversion so this is what it should look like for the conversion
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Old 10-25-2010, 08:33 AM
  #68  
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Default RE: Tamiya TRF 801XT Build Thread

Hey, no worries man - not stealing the thread at all. Don't hesitate to add good info!

So it looks like you don't really install much of anything on the chassis plate if you do the e-conversion. Cool - appreciate the pic. I think my kit should get here today, so will get rolling on it soon!

Thanks for the tip on the screw in the shock shaft. Since I'm already all set up w/oil and all, I'll just leave it and threadlock next time I do a rebuild, I think.
Old 10-25-2010, 08:40 AM
  #69  
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Default RE: Tamiya TRF 801XT Build Thread

Also, no idea what pinion to run with yet. How about yourself? Also, you doing 3s? 4s?
Old 10-25-2010, 09:04 AM
  #70  
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Default RE: Tamiya TRF 801XT Build Thread

Im doing 4s and probably 6s........maybe............ I ordered a couple of pinions so I can have some options.

It took about 20min to install and its very straightforward
Old 10-25-2010, 09:31 AM
  #71  
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Default RE: Tamiya TRF 801XT Build Thread

Cool - I'll be doing 4s I believe. What pitch pinions are these? (I haven't even thought of it yet). Mod1?
Old 10-25-2010, 09:38 AM
  #72  
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Default RE: Tamiya TRF 801XT Build Thread

Yep its mod1, I was going to use the one that came with my MMM but thats a mod8. Now that I look at it, I dont think a 6s will fit with the body on[:@] I have to try my 4s to see if it fits
Old 10-25-2010, 10:15 AM
  #73  
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Default RE: Tamiya TRF 801XT Build Thread

Yes the 4s does fit with the body on now to buy some 6s
Old 10-26-2010, 07:29 AM
  #74  
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Default RE: Tamiya TRF 801XT Build Thread

Good deal, I think I have mod1 pinions lying around. I think you'll get a chance to run yours before mine, so let me know what gearing you settled on (and with what motor/battery combo, etc). Just for a reference point.

Also, could you provide a pic with your conversion kit installed? Want to be sure I'm doing it right. Got mine last night, and just started installing. Noticed the nice engraving on the motor mount/bearing carriers, but they face inward (toward the center diff) so you can't read them.

Anyway, a pic or two for Eman's peace of mind is appreciated.
Old 10-26-2010, 12:30 PM
  #75  
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Default RE: Tamiya TRF 801XT Build Thread

Ok heres a couple of pics, I will take some more when I get a chance later
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