RCCrawler Forums

billy gunn · 11-08-2005, 12:18 PM

Does anyone make a machined metal spool for the Stampede tranny? I am currently running a JB-Welded diff in my crawler, but on my next project a metal spool would be ideal. I think a lot of people would buy one for their TLT crawlers as well as whatever else, rotating mass in the tranny is not a huge deal in a rock-crawler, so an all metal geared tranny would be possible.

microgoat · 11-08-2005, 12:52 PM

i can't see all that machine work for less than a hundred bucks a unit, unless you can sell tens of thousands of them. it would have to be steel, as aluminum output shafts would twist off in no time flat.

a drop-in plate that locks the planetary gears might be possible, but not cheaper than JB, and you're still using the plastic main gear.

nice idea, though. hard to manufacture, horribly expensive, all the hallmarks of a Goatworks product

need a job?

billy gunn · 11-08-2005, 01:01 PM

I know the machining would be expensive.. Done enough work with machine shops to know doing gears are not worth it unless doing it bulk. Just wondering if anyone has produced them. I'm thinking my custom tranny is going to have a little extra play in it, so a metal main gear would make an all metal tranny and I would have to worry less about stripping the last plastic gear in my tranny. Not to mention the gears are going to be exposed..

but I'll figure that out when I get that far

chafey · 11-08-2005, 01:09 PM

try the pede forums, there are companies that make all metal gears for them.

TwistedXT · 11-08-2005, 01:15 PM

Check these guys out...

RC-Monster Website

thought this might help... if youve got the money.

microgoat · 11-08-2005, 01:25 PM

so seventy bucks for the gear and the case, no guts, i wasn't too far off.

skid · 11-08-2005, 01:48 PM

I'm thinking a 5 mm shaft with a washer in the middle. Four holes in the washer for the planetary pins to go through and installed inside the stock diff gear. Alot of wasted steel to make out of one piece, but I think it would be simple, if I had a solid bar of steel and a lathe.

JeepJohn · 11-08-2005, 04:05 PM

I'm not familiar with the 'Pede trans. but I fabricated a spool for my TLT-1 using parts from Stock Drive Products. They have just about every small gear, belts, and bearings known to man.

http://www.sdp-si.com/D790/D790Cat.htm

rckjeep · 11-08-2005, 05:59 PM

Quote:

Originally Posted by JeepJohn

I'm not familiar with the 'Pede trans. but I fabricated a spool for my TLT-1 using parts from Stock Drive Products. They have just about every small gear, belts, and bearings known to man.

http://www.sdp-si.com/D790/D790Cat.htm

WOOHA! you can't say you fabbed a spool for a TLT in this forum and getaway without spilling the beans. CAn you post up a link to the exact parts you used?

Also I don't think $60 is bad for a CNC'd gearbox case.

JeepJohn · 11-08-2005, 06:49 PM

Bear with me on this, it's a numbers thing.

The Stock TLT-1 belt drive uses a 4mm x 3.0mm Pitch belt rated at 488 N/mm max torque.

For example:
Trinity green machine - 95.2 N/mm Torque
Stock Pinion & Spur Gear - 3.46:1 = 329.4 N/mm Torque
12T pinion & 93T Spur - 7.75:1 = 737.8 N/mm Torque
(Broken Drive Belt)

I replaced all of the original Tamiya drive belt system with SDP parts.

16T 2.03 Pitch Pulley PN# A 6A16M016DF 6004 (Replaces 15T Pulley on Spur Shaft)
40T 2.03 Pitch Pulley PN# A 6A16M040DF 6006 (Replaces Ball Diff Pulley)
Two Bore Reducers PN# A 7A30M100612 (Sleeves that mate 6mm solid shaft to stock Tamiya Bearings)
Two Bore Reducers PN# A 7A30M060509 (Sleeves That mate 5mm Axle Pinion Shafts to 6mm U-joints)

This is where I got into trouble! SDP has Stainless Steel Drive Shafts with a true Spline Slip Joint, but they are $129 each, so I'm working on an alternative.

MORE NUMBERS

The upgrade uses a 6mm wide 2.03 Pitch Kevlar Belt that is rated at 1176 N/mm
(Almost 3 times the Stock Belt)
The Gear Ratio also increased from 2.13:1 to 2.50:1

I have also fabbed an Idler bearing to pre-tension the drive belt.
I'll have some photos, as well as CADD drawings, posted soon. (this also helps keep the stock trans alive as the stock belt is TOO long)

I'm still working on the BUGS! BUt I'll post everything when my TLT-1 is in runnig order.:?

P.S. As a Full-Scale Wheeler its nice to see someone get the Diff lingo right.
A limited slip or posi is NOT a locker
A Locker IS a positive engaging traction devise ( Ratchet )
A Spool IS a solid drive-shaft (Lincoln Locker, or JB Locker for the small scale)_
No affense intended toward anyone. Although a 1/10th scale Detroit would be trick

JeepJohn · 11-08-2005, 07:03 PM

If your running a stock TLT-1 Trans, get this upgrade

The Stock Tamiya spur gear holder is made of Derlin and is not only weak but doesn't run true.

Upgrade using Tamiya PN# TAM 53614 ( Listed as TA04 Aluminum Spur Gear Holder )

I got mine for less than $20. The kit uses cap screws and includes a Carbon Graphite Backing Plate.

The Spur gear slot in the frame plate has to be notched to clear the cap screws.

I'll post a pic of the notch soon.

Thanks. John

cvecmaxx · 11-08-2005, 08:31 PM

cold fushion racing makes a aluminum diff for the pede, it is lockable i belive, and it was 68.00 shiped i belive

radishkid · 11-08-2005, 08:41 PM

Quote:

Originally Posted by TwistedXT

thought this might help... if youve got the money.

You can occasionally find that part on eBay under Traxxas Steel Differential. The main gear is machined out of stainless and the diff case is aluminum. I know, I'm one of the tools who bought one

billy gunn · 11-08-2005, 08:44 PM

Quote:

Originally Posted by cvecmaxx

cold fushion racing makes a aluminum diff for the pede, it is lockable i belive, and it was 68.00 shiped i belive

Got a site?

I might be willing to spend the 70 bux for it. I'll have to see once I finish making my tranny case. Thanks for the help.

rckjeep · 11-09-2005, 12:35 AM

Quote:

Originally Posted by JeepJohn

Bear with me on this, it's a numbers thing.

The Stock TLT-1 belt drive uses a 4mm x 3.0mm Pitch belt rated at 488 N/mm max torque.

For example:
Trinity green machine - 95.2 N/mm Torque
Stock Pinion & Spur Gear - 3.46:1 = 329.4 N/mm Torque
12T pinion & 93T Spur - 7.75:1 = 737.8 N/mm Torque
(Broken Drive Belt)

I replaced all of the original Tamiya drive belt system with SDP parts.

16T 2.03 Pitch Pulley PN# A 6A16M016DF 6004 (Replaces 15T Pulley on Spur Shaft)
40T 2.03 Pitch Pulley PN# A 6A16M040DF 6006 (Replaces Ball Diff Pulley)
Two Bore Reducers PN# A 7A30M100612 (Sleeves that mate 6mm solid shaft to stock Tamiya Bearings)
Two Bore Reducers PN# A 7A30M060509 (Sleeves That mate 5mm Axle Pinion Shafts to 6mm U-joints)

This is where I got into trouble! SDP has Stainless Steel Drive Shafts with a true Spline Slip Joint, but they are $129 each, so I'm working on an alternative.

MORE NUMBERS

The upgrade uses a 6mm wide 2.03 Pitch Kevlar Belt that is rated at 1176 N/mm
(Almost 3 times the Stock Belt)
The Gear Ratio also increased from 2.13:1 to 2.50:1

I have also fabbed an Idler bearing to pre-tension the drive belt.
I'll have some photos, as well as CADD drawings, posted soon. (this also helps keep the stock trans alive as the stock belt is TOO long)

I'm still working on the BUGS! BUt I'll post everything when my TLT-1 is in runnig order.:?

P.S. As a Full-Scale Wheeler its nice to see someone get the Diff lingo right.
A limited slip or posi is NOT a locker
A Locker IS a positive engaging traction devise ( Ratchet )
A Spool IS a solid drive-shaft (Lincoln Locker, or JB Locker for the small scale)_
No affense intended toward anyone. Although a 1/10th scale Detroit would be trick

Oh I was thinking you had done an axle spool not a tranny spool. Damn I was getting excited about a TLT axle spool. :?

Knytemare · 11-09-2005, 10:43 AM

Quote:

Originally Posted by JeepJohn

Bear with me on this, it's a numbers thing.

The Stock TLT-1 belt drive uses a 4mm x 3.0mm Pitch belt rated at 488 N/mm max torque.

For example:
Trinity green machine - 95.2 N/mm Torque
Stock Pinion & Spur Gear - 3.46:1 = 329.4 N/mm Torque
12T pinion & 93T Spur - 7.75:1 = 737.8 N/mm Torque
(Broken Drive Belt)

I replaced all of the original Tamiya drive belt system with SDP parts.

16T 2.03 Pitch Pulley PN# A 6A16M016DF 6004 (Replaces 15T Pulley on Spur Shaft)
40T 2.03 Pitch Pulley PN# A 6A16M040DF 6006 (Replaces Ball Diff Pulley)
Two Bore Reducers PN# A 7A30M100612 (Sleeves that mate 6mm solid shaft to stock Tamiya Bearings)
Two Bore Reducers PN# A 7A30M060509 (Sleeves That mate 5mm Axle Pinion Shafts to 6mm U-joints)

This is where I got into trouble! SDP has Stainless Steel Drive Shafts with a true Spline Slip Joint, but they are $129 each, so I'm working on an alternative.

MORE NUMBERS

The upgrade uses a 6mm wide 2.03 Pitch Kevlar Belt that is rated at 1176 N/mm
(Almost 3 times the Stock Belt)
The Gear Ratio also increased from 2.13:1 to 2.50:1

I have also fabbed an Idler bearing to pre-tension the drive belt.
I'll have some photos, as well as CADD drawings, posted soon. (this also helps keep the stock trans alive as the stock belt is TOO long)

I'm still working on the BUGS! BUt I'll post everything when my TLT-1 is in runnig order.:?

P.S. As a Full-Scale Wheeler its nice to see someone get the Diff lingo right.
A limited slip or posi is NOT a locker
A Locker IS a positive engaging traction devise ( Ratchet )
A Spool IS a solid drive-shaft (Lincoln Locker, or JB Locker for the small scale)_
No affense intended toward anyone. Although a 1/10th scale Detroit would be trick

What the hell was I thinking of trying to read this post first thing in the morning before my cup of coffee!

xjnation · 11-09-2005, 03:52 PM

EASY TLT trans center locker: Get some t-maxx slider axles. Need a male 4 spline piece about 3 inches long and 2 female ends about 3/4" and 1.5" long. cut out 4 notches on belt pulley so male slider will slide into it. JB weld it to the slider. Slide female ends through tranny case ( be sure to take bearings out) and run a long bolt through the whole assembly through the ends. Took me about an hour to figure it and build it. Might be ghetto but it works great. Be sure to test fit everything before the JB so both pulleys line up. Next time I tear into it, i'll post pics.

xjnation · 11-09-2005, 03:55 PM

I'll try to figure the axle locker whenever I tear into it. I'll let ya guys know.

Blood · 11-09-2005, 04:44 PM

I buggered my pede diff.... so I repaired it with in my own ingenoius way ;)
Took the guts of the spool out....
then
Using a steel tent peg which I cut down, threaded and bolted onto the inside of the spool. Also filled the diff with tough epoxy resin.

Filed down a couple flat spots on the ends and put the yokes on

Super strong and works great !

Mad Scientist · 11-09-2005, 09:34 PM

Are the stock gears in the Pede diff steel? I remember seeing someone made hardened steel sun gears for the Pede tranny at one time.

11-08-2005, 12:18 PM	#1
billy gunn Rock Stacker Join Date: Sep 2005 Location: SLC Posts: 72	Stampede spool Does anyone make a machined metal spool for the Stampede tranny? I am currently running a JB-Welded diff in my crawler, but on my next project a metal spool would be ideal. I think a lot of people would buy one for their TLT crawlers as well as whatever else, rotating mass in the tranny is not a huge deal in a rock-crawler, so an all metal geared tranny would be possible.

11-08-2005, 04:05 PM	#8
JeepJohn Newbie Join Date: Nov 2005 Location: Somers Posts: 10	This may help I'm not familiar with the 'Pede trans. but I fabricated a spool for my TLT-1 using parts from Stock Drive Products. They have just about every small gear, belts, and bearings known to man. http://www.sdp-si.com/D790/D790Cat.htm

11-08-2005, 06:49 PM	#10
JeepJohn Newbie Join Date: Nov 2005 Location: Somers Posts: 10	SDP parts for TLT-1 Center Spool Bear with me on this, it's a numbers thing. The Stock TLT-1 belt drive uses a 4mm x 3.0mm Pitch belt rated at 488 N/mm max torque. For example: Trinity green machine - 95.2 N/mm Torque Stock Pinion & Spur Gear - 3.46:1 = 329.4 N/mm Torque 12T pinion & 93T Spur - 7.75:1 = 737.8 N/mm Torque (Broken Drive Belt) I replaced all of the original Tamiya drive belt system with SDP parts. 16T 2.03 Pitch Pulley PN# A 6A16M016DF 6004 (Replaces 15T Pulley on Spur Shaft) 40T 2.03 Pitch Pulley PN# A 6A16M040DF 6006 (Replaces Ball Diff Pulley) Two Bore Reducers PN# A 7A30M100612 (Sleeves that mate 6mm solid shaft to stock Tamiya Bearings) Two Bore Reducers PN# A 7A30M060509 (Sleeves That mate 5mm Axle Pinion Shafts to 6mm U-joints) This is where I got into trouble! SDP has Stainless Steel Drive Shafts with a true Spline Slip Joint, but they are $129 each, so I'm working on an alternative. MORE NUMBERS The upgrade uses a 6mm wide 2.03 Pitch Kevlar Belt that is rated at 1176 N/mm (Almost 3 times the Stock Belt) The Gear Ratio also increased from 2.13:1 to 2.50:1 I have also fabbed an Idler bearing to pre-tension the drive belt. I'll have some photos, as well as CADD drawings, posted soon. (this also helps keep the stock trans alive as the stock belt is TOO long) I'm still working on the BUGS! BUt I'll post everything when my TLT-1 is in runnig order.:? P.S. As a Full-Scale Wheeler its nice to see someone get the Diff lingo right. A limited slip or posi is NOT a locker A Locker IS a positive engaging traction devise ( Ratchet ) A Spool IS a solid drive-shaft (Lincoln Locker, or JB Locker for the small scale)_ No affense intended toward anyone. Although a 1/10th scale Detroit would be trick

11-08-2005, 07:03 PM	#11
JeepJohn Newbie Join Date: Nov 2005 Location: Somers Posts: 10	Oops - Forgot this one If your running a stock TLT-1 Trans, get this upgrade The Stock Tamiya spur gear holder is made of Derlin and is not only weak but doesn't run true. Upgrade using Tamiya PN# TAM 53614 ( Listed as TA04 Aluminum Spur Gear Holder ) I got mine for less than $20. The kit uses cap screws and includes a Carbon Graphite Backing Plate. The Spur gear slot in the frame plate has to be notched to clear the cap screws. I'll post a pic of the notch soon. Thanks. John

11-08-2005, 12:52 PM	#2
microgoat I wanna be Dave Join Date: Feb 2005 Location: Cleveland, OH Posts: 8,009	i can't see all that machine work for less than a hundred bucks a unit, unless you can sell tens of thousands of them. it would have to be steel, as aluminum output shafts would twist off in no time flat. a drop-in plate that locks the planetary gears might be possible, but not cheaper than JB, and you're still using the plastic main gear. nice idea, though. hard to manufacture, horribly expensive, all the hallmarks of a Goatworks product need a job?

11-08-2005, 01:01 PM	#3
billy gunn Rock Stacker Join Date: Sep 2005 Location: SLC Posts: 72	I know the machining would be expensive.. Done enough work with machine shops to know doing gears are not worth it unless doing it bulk. Just wondering if anyone has produced them. I'm thinking my custom tranny is going to have a little extra play in it, so a metal main gear would make an all metal tranny and I would have to worry less about stripping the last plastic gear in my tranny. Not to mention the gears are going to be exposed.. but I'll figure that out when I get that far

11-08-2005, 01:09 PM	#4
chafey Rock Crawler Join Date: Aug 2004 Location: woods cross utah Posts: 523	try the pede forums, there are companies that make all metal gears for them.

11-08-2005, 01:15 PM	#5
TwistedXT Powered by Awesome Join Date: Sep 2004 Location: Parker, Colorado Posts: 3,622	Check these guys out... RC-Monster Website thought this might help... if youve got the money.

11-08-2005, 01:25 PM	#6
microgoat I wanna be Dave Join Date: Feb 2005 Location: Cleveland, OH Posts: 8,009	so seventy bucks for the gear and the case, no guts, i wasn't too far off.

11-08-2005, 01:48 PM	#7
skid Rock Crawler Join Date: Nov 2004 Location: in a basement in Kalispell, MT Posts: 857	I'm thinking a 5 mm shaft with a washer in the middle. Four holes in the washer for the planetary pins to go through and installed inside the stock diff gear. Alot of wasted steel to make out of one piece, but I think it would be simple, if I had a solid bar of steel and a lathe.

11-08-2005, 08:31 PM	#12
cvecmaxx Pebble Pounder Join Date: Sep 2005 Location: minocqua Posts: 165	cold fushion racing makes a aluminum diff for the pede, it is lockable i belive, and it was 68.00 shiped i belive

11-09-2005, 03:52 PM	#17
xjnation Rock Stacker Join Date: Oct 2005 Location: Springfield Posts: 50	EASY TLT trans center locker: Get some t-maxx slider axles. Need a male 4 spline piece about 3 inches long and 2 female ends about 3/4" and 1.5" long. cut out 4 notches on belt pulley so male slider will slide into it. JB weld it to the slider. Slide female ends through tranny case ( be sure to take bearings out) and run a long bolt through the whole assembly through the ends. Took me about an hour to figure it and build it. Might be ghetto but it works great. Be sure to test fit everything before the JB so both pulleys line up. Next time I tear into it, i'll post pics.

11-09-2005, 03:55 PM	#18
xjnation Rock Stacker Join Date: Oct 2005 Location: Springfield Posts: 50	I'll try to figure the axle locker whenever I tear into it. I'll let ya guys know.

11-09-2005, 04:44 PM	#19
Blood Rock Stacker Join Date: Jun 2005 Location: Scotland Posts: 68	I buggered my pede diff.... so I repaired it with in my own ingenoius way ;) Took the guts of the spool out.... then Using a steel tent peg which I cut down, threaded and bolted onto the inside of the spool. Also filled the diff with tough epoxy resin. Filed down a couple flat spots on the ends and put the yokes on Super strong and works great !

Sponsored Links

11-09-2005, 09:34 PM	#20
Mad Scientist RCC Addict Join Date: Mar 2005 Location: Saginaw Posts: 1,721	Are the stock gears in the Pede diff steel? I remember seeing someone made hardened steel sun gears for the Pede tranny at one time.

RCCrawler Forums

Thread: Stampede spool