RCCrawler Forums

microgoat · 07-24-2005, 05:27 AM

got sick of waiting for Tamiya parts, so i decided to do something about the busted TLT pinion shaft on my crawler (brushless motor snapped it right off). looking around the LHS for a 5mm shaft (they're everywhere) i settled on a Traxxas stub axle. cut off the plastic u-joint, lathed the shaft down to press fit in the pinion gear, then dremeled a slot in the backside of the gear to accept a 2mm pin. loctited the mess together and installed. it works! now i can crawl again (2wd crawling sucks).

it doesn't have to last forever, just until the proper parts arrive. let's see if i can break it before then!

nd4spdbh · 07-24-2005, 04:39 PM

ooo sounds intresting.... hey ya goo and try to break it b 4 ur parts come... just dont break something else like an axle shaft or a ring gear or stub axle

microgoat · 07-25-2005, 04:59 AM

i gave it a good bashing yesterday and it held up. my theory is that if it doesn't break in the first five minutes it won't break at all, and it withstood 3 hours so far. so now when the parts come they'll be spares for when the gears wear out.

syco133 · 07-25-2005, 06:01 AM

I hope you took pics to show us just in case we need to do this.

microgoat · 07-25-2005, 12:40 PM

uuuuuhhhhh....

well, no.....but i can take pics of it when i take it back apart for the new gears.

microgoat · 08-17-2005, 07:18 PM

this is an emergency, half-butted repair for a broken TLT pinion shaft:

i'll walk ya thru it:
0 push the old shaft out of the Tamiya pinion gear.

1 take a Pede stub axle and cut off the plastic yoke. underneath is a flat spot on the shaft just like the Tamiya gearshaft. remove the pin.

2 cut off the threaded portion and cut the end in a lathe down to about 4mm with a slight taper. trial & error will let you get a nice tight fit in the gear. set up the taper so that the hole for the 2mm pin will sit just inside the gear.

3 get out the Dremel and cut a slot in the back of the gear to accept the pin. gob up the shaft with blue Loctite (or better yet, red Loctite, then it won't fail like this one did) and press it in using a vise. hold until the Loctite sets up (i let it sit overnite)

4 install in the truck and run it for a month. by then your LHS should have the proper Tamiya gear and you can fix it right.

Nova · 08-17-2005, 09:30 PM

I almost had the same problem, but mine involved the Ring gear and the Pinion...

Both the Ring and the Pinion are stripped...
When I get all my parts, it'll be bomb-proof and new looking... Nothing like my old setup...

Oh btw, sweet fab job

07-24-2005, 05:27 AM	#1
microgoat I wanna be Dave Join Date: Feb 2005 Location: Cleveland, OH Posts: 8,009	TLT diff repair got sick of waiting for Tamiya parts, so i decided to do something about the busted TLT pinion shaft on my crawler (brushless motor snapped it right off). looking around the LHS for a 5mm shaft (they're everywhere) i settled on a Traxxas stub axle. cut off the plastic u-joint, lathed the shaft down to press fit in the pinion gear, then dremeled a slot in the backside of the gear to accept a 2mm pin. loctited the mess together and installed. it works! now i can crawl again (2wd crawling sucks). it doesn't have to last forever, just until the proper parts arrive. let's see if i can break it before then!

07-24-2005, 04:39 PM	#2
nd4spdbh Rock Crawler Join Date: Mar 2005 Location: Dude on my dirt bike in SoCal!!! Posts: 949	ooo sounds intresting.... hey ya goo and try to break it b 4 ur parts come... just dont break something else like an axle shaft or a ring gear or stub axle

07-25-2005, 04:59 AM	#3
microgoat I wanna be Dave Join Date: Feb 2005 Location: Cleveland, OH Posts: 8,009	i gave it a good bashing yesterday and it held up. my theory is that if it doesn't break in the first five minutes it won't break at all, and it withstood 3 hours so far. so now when the parts come they'll be spares for when the gears wear out.

07-25-2005, 06:01 AM	#4
syco133 RCC Addict Join Date: Jan 2005 Location: Green River Kentucky Posts: 1,067	I hope you took pics to show us just in case we need to do this.

07-25-2005, 12:40 PM	#5
microgoat I wanna be Dave Join Date: Feb 2005 Location: Cleveland, OH Posts: 8,009	uuuuuhhhhh.... well, no.....but i can take pics of it when i take it back apart for the new gears.

08-17-2005, 07:18 PM	#6
microgoat I wanna be Dave Join Date: Feb 2005 Location: Cleveland, OH Posts: 8,009	this is an emergency, half-butted repair for a broken TLT pinion shaft: i'll walk ya thru it: 0 push the old shaft out of the Tamiya pinion gear. 1 take a Pede stub axle and cut off the plastic yoke. underneath is a flat spot on the shaft just like the Tamiya gearshaft. remove the pin. 2 cut off the threaded portion and cut the end in a lathe down to about 4mm with a slight taper. trial & error will let you get a nice tight fit in the gear. set up the taper so that the hole for the 2mm pin will sit just inside the gear. 3 get out the Dremel and cut a slot in the back of the gear to accept the pin. gob up the shaft with blue Loctite (or better yet, red Loctite, then it won't fail like this one did) and press it in using a vise. hold until the Loctite sets up (i let it sit overnite) 4 install in the truck and run it for a month. by then your LHS should have the proper Tamiya gear and you can fix it right.

08-17-2005, 09:30 PM	#7
Nova Quarry Creeper Join Date: Jun 2005 Location: S Oregon. Posts: 325	I almost had the same problem, but mine involved the Ring gear and the Pinion... Both the Ring and the Pinion are stripped... When I get all my parts, it'll be bomb-proof and new looking... Nothing like my old setup... Oh btw, sweet fab job

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