Tamiya TRF help

[AQUABATH 9]

I bought myself a Tamiya TRF 419xr as a lock down build and enjoyed the build and the quality. Since driving it around a car park next to my house, I have had the short drive belt come off and jam next to the gear once, and then flip upside down and basically sand all the teeth off the rear diff, what parts do I need to order to rectify, and are there any upgraded versions that may last longer than three days, or should I only be driving this inside on carpet ?

[svenb 3778]

I'm no expert but I'd stick to carpet or squeeky clean tarmac, you might have got a small stone stuck between the teeth and belt😳

[qatmix 794]

You need this part for the rear diff 

Tamiya 51566 RC TRF419 Gear Diff Differential Case

Secondly, I would check your build. You really should not have this happen. You probably have one of the following issues with the build.

Rear belt too loose / tight. Both are an issue. You want to press your finger down on the belt and for it to be able to move 2-3mm down 

Diff cams - The TRF cars all have eccentric diff cams so you can adjust the tension. Each side has to be in the same position. So for example, if you are back one on the left rear, it needs to be back one on the right rear. Lots of times people do not get these aligned and that can cause issues with the drive train. 

If you are on carparks, you will be fine with the open belt system. Even prepped race tracks have the odd thing on them. I've raced TRF's for many years and never had a belt come off or stripped a gear because of a stone etc. I've even rallied one before and not had an issue.

I have several TRF build articles here where I mention tips etc.. 

https://www.thercracer.com/2013/06/tamiya-trf417v5-build-thread.html

https://www.thercracer.com/2014/01/tamiya-trf418-build-and-review.html
https://www.thercracer.com/2015/02/42285-trf419-build-and-review.html

https://www.thercracer.com/2016/07/42301-tamiya-trf419x-build-review-and.html

https://www.thercracer.com/2018/06/42316-tamiya-trf419xr-build-review-and.html

https://www.thercracer.com/2019/12/42345-tamiya-trf420-build-review-and.html

Have fun, TRF's are great

 

 

[AQUABATH 9]

43 minutes ago, qatmix said:

You need this part for the rear diff 

Tamiya 51566 RC TRF419 Gear Diff Differential Case

Secondly, I would check your build. You really should not have this happen. You probably have one of the following issues with the build.

Rear belt too loose / tight. Both are an issue. You want to press your finger down on the belt and for it to be able to move 2-3mm down 

Diff cams - The TRF cars all have eccentric diff cams so you can adjust the tension. Each side has to be in the same position. So for example, if you are back one on the left rear, it needs to be back one on the right rear. Lots of times people do not get these aligned and that can cause issues with the drive train. 

If you are on carparks, you will be fine with the open belt system. Even prepped race tracks have the odd thing on them. I've raced TRF's for many years and never had a belt come off or stripped a gear because of a stone etc. I've even rallied one before and not had an issue.

I have several TRF build articles here where I mention tips etc.. 

https://www.thercracer.com/2013/06/tamiya-trf417v5-build-thread.html

https://www.thercracer.com/2014/01/tamiya-trf418-build-and-review.html
https://www.thercracer.com/2015/02/42285-trf419-build-and-review.html

https://www.thercracer.com/2016/07/42301-tamiya-trf419x-build-review-and.html

https://www.thercracer.com/2018/06/42316-tamiya-trf419xr-build-review-and.html

https://www.thercracer.com/2019/12/42345-tamiya-trf420-build-review-and.html

Have fun, TRF's are great

 

 

Fantastic, thank you, i'll work my way through your links, its my second build ford 35 years so a lot has changed, really appreciate your reply

 

[qatmix 794]

No problem, have fun

[AQUABATH 9]

14 hours ago, qatmix said:

No problem, have fun

I’ve ordered a replacement belt and a 42310 Aluminium dif pulley, will in need a new housing too?

[Raman36 1656]

Aquabath, you don't need the 42310 Alum diff pulley, its over kill since you are just running it outside. Stick with the plastic one and you will be fine.  Just place close attention to diff position as Qatmix said.  

On the diff cam, I usually put a drop of red tamiya paint on the dot so that I can better view its position as light.  Make sure they are in same position on both sides.