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Old 02-02-2014
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Thumbs up TRF 502x Gear Diff DIY...

OK...
I will start to give you guys the 1st part of the Puzzle for making the Durango Dex410 Gear Diffs work with the TRF 502x... the parts list... it's going to cost a little bit but it will be worth it not having to deal with the TRF502x ball diff maintenance
Anyways... on with the parts list...

Durango DEX410Parts
TD210001 Gear Differential Set x2
TD310005 17T Bevel Gear x2
TD310116 Driveshaft Gear Input (2.0mm) x1
TD310145 42T Light Weight Machined Differential Ring Gear x2 (Optional)
TD310290 Light Weight Molded Cross Shaft/Gear Set x2 (Optional)
MIP Parts
13126 Center Input Hub x1 (or x2 depending on shimming)
13133 Center Drive Shaft Front 89mm x1
13141 Center Drive Shaft Rear 69mm x1
13122 #1 Pins & Screws x1
13121 #1 Orange "PUCKS" x1

So this is Part 1 of 4.. and I will have Pictures to follow in the upcoming weeks on what areas need to be modified in the gear box housing to make the diff fit.. most of everything is drop in and the drive shafts are Lightweight alloy so they will be comparable to the Alloy TAMIYA ones.. if not lighter...
One last thing.... we might be able to make the Durango DEX410v4 Two Way Slipper fit as well more to follow...
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Old 03-02-2014
fastinfastout fastinfastout is offline
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just buy a durango.....
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Old 03-02-2014
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Any indication on the cost of the conversion?

I'm running TSR Ceramic ball diffs in my 502X and they are doing the job nicely. they cost around $80 US total for the car.
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Old 03-02-2014
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Quote:
Originally Posted by fastinfastout View Post
just buy a durango.....
.... . Nope.. I like the strength of the Sus arms and other parts over the durango.. I would have tried to use the B-MAX-III gear diffs but finding parts for those is even worse..
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Old 03-02-2014
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Lightbulb

Quote:
Originally Posted by Aussie Top Force View Post
Any indication on the cost of the conversion?

I'm running TSR Ceramic ball diffs in my 502X and they are doing the job nicely. they cost around $80 US total for the car.
Well the Diff's alone will be around 75$~85$ for the diffs and bevel gears.. not the MIP stuff is about 30$ and the last little Durango parts should be no more than 10~15$...

So about 135~140$ tops for a set of bullet proof diffs..
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  #6  
Old 18-02-2014
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Default re

You should try the Team C TC4 gear diff, worked for me with very little modification.
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Old 18-02-2014
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Quote:
Originally Posted by DavidAMS View Post
You should try the Team C TC4 gear diff, worked for me with very little modification.
What are those little mods? Do you have pics? I am very interested )))

Thanks
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Old 18-02-2014
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Unfortunately I never took photos, but the main things that needed was the inner of the lower gear boxes needed to be dremeled to create room for the diff, and the drive cups of the diffs need to be shortened as they interfere with the travel of the shocks.They need to be shimmed correctly for the best performance. You need the front dogbones from Team C aswell.
I could drive the car much faster and had more fun with gear diffs than ball diff. I have not raced in almost 2 years, I plan to start up again soon, so I will post photos when I open it up again.

Its was a easy conversion and much more simple than using the durango diffs.
I got the idea from another post in the tamiya section regarding the use of team c gear diff in the 502x.
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TRF 502x
DF03 3racing conversion
DF03 KMRC conversion
http://l-m-racing.co.uk
http://www.modellbau-seidel.de
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Team TRF NL
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  #9  
Old 18-02-2014
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Thumbs up Cost

Form looking at the pictures in the manual.. it looks like the Team C diffs would work a little better....

But what is the cost difference...??

Also when you do do some maintenance on the diffs PLEASE PLEASE PLEASE!! take some pic's
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  #10  
Old 19-02-2014
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Lightbulb

http://www.oople.com/forums/showthread.php?t=91765

Found it..... Now if I could only find a place that has these parts in Japan or in the US

If anybody knows of a place to get these diffs please PM me
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  #11  
Old 21-02-2014
taomo taomo is offline
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Thanks SiR_Dave.
It seems to be easy to mod but see what discostu say:

Quote:
Originally Posted by discostu View Post
its not as simple as it sounds you need to dremel the inner rib of the gear boxes and the drive shafts have way too much slop theteam c diff outdrives use 2.5mm dog bone pins and tamiya uses 2.0mm you also need to hone the inner of the out drive to get full up travel with tamiya drive shafts.

you can fit team c drive shafts but you would need the hex pins and the wheels to fit.

stu
The Team C gear diffs cost: 60€ (in Europe)
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  #12  
Old 21-02-2014
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Default re

just use the team c driveshafts and its not a problem.

So the mods that need to be done are:

Dremel inner gear boxes to make space for the diff( just the inner ribs on the top and bottom)

Dremel the outdrives to make them about 0.5cm shorter

Team c drive shafts front and back. Do not recall needing different wheels, it was a straight fit.

Needs to be shimmed correctly.

I am pretty sure thats all you need to do,.
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TRF 502x
DF03 3racing conversion
DF03 KMRC conversion
http://l-m-racing.co.uk
http://www.modellbau-seidel.de
http://www.machheemstede.nl
Team TRF NL
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  #13  
Old 21-02-2014
taomo taomo is offline
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Quote:
Originally Posted by DavidAMS View Post
just use the team c driveshafts and its not a problem.

So the mods that need to be done are:

Dremel inner gear boxes to make space for the diff( just the inner ribs on the top and bottom)

Dremel the outdrives to make them about 0.5cm shorter

Team c drive shafts front and back. Do not recall needing different wheels, it was a straight fit.

Needs to be shimmed correctly.

I am pretty sure thats all you need to do,.
In other words:
-TeamC Gear Diff For TC04/TR04 TU0439 (60€)
-TeamC Front Cvd (2) T04025 (19€)
-TeamC Rear Cvd (2) T04027 (19€)
It is correct?
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  #14  
Old 04-03-2014
taomo taomo is offline
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Hi,

Team C gear diffs arrived. It is not necessary to dremel the gear case, only must be shimmed correctly. To achieve the 2,8mm you can use a 850 ball bearing (the one used in the ball diff) plus 0.3mm shim.
I can't test the car until I buy the gear silicone (I think 7k or 6k front diff and 3k or 2k rear diff -outdoor track-) and the front and rear Team C CVD.



Best regards
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  #15  
Old 05-03-2014
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Thumbs up

That is awesome right there !!!!

Please take more pic's once you have the final cvd's installed on the car with the gear oil up and ready to go...

Also what is the weight difference between the TRF502x diff and the Team C gear diff...?
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  #16  
Old 05-03-2014
taomo taomo is offline
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Quote:
Originally Posted by SiR_Dave View Post
That is awesome right there !!!!

Please take more pic's once you have the final cvd's installed on the car with the gear oil up and ready to go...

Also what is the weight difference between the TRF502x diff and the Team C gear diff...?
No doubt, I will do that
Weight without oil is considerably higher. I think this would be the handicap of this mod. Probably the next week I can give you the numbers .
I'm anxious to test it!
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  #17  
Old 05-03-2014
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Thumbs up

The weight difference should not be too much of a problem... since the TRF502x is a little on the light side for a 4wd buggy

I shoud have my parts later next week as well.. so this will be nice to test out
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  #18  
Old 19-03-2014
taomo taomo is offline
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Hi,
here are the weight difference. See what I must do in the gear boxes for the best accuracy. Car is not ready to run at the track because I didn't cut the outdrives yet but today I tested at home and it works fine nevertheless I still have work to do.






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  #19  
Old 20-03-2014
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Question

Nice... so only about 13 grams per set... so after you cut them down you might be about 11~12 grams per set...

Now to see if the Dogbones fit correctly
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  #20  
Old 25-09-2015
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Default TRF502 GEAR DIFF

hi guys

what is the best option Durango or team C Gear diff for TRF502?

or is there now a better option for TRF502

let me know if you use a gear diff

if so what gear diff u use

Thanks Marco
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