Rear Gearbox is crunchy

[moliver]

New 5iveBuggy, front gear box is smooth. Rear gear box is crunchy like something is wrong with the mesh. Is this a common problem, do I just have to pull it apart and shim it? Its brand new.

It feels too tight, right now I am sad.

 

[gat0zz]

try to disassemble and check if there is something damaged, or something dirty in some bearing .. I had a similar problem with a nitro buggy differential and it had been the satellites inside the differential

 

[moliver]

Diff is fine, its the ring gear and pinion that are not happy.

 

[Rep732]

Something is loose in the gears. Check pinion bearings and see if the ring gear is loose on the diff. Also check each tooth you may have something stuck in one

 

[Seandonato73]

And since it's new that means warranty. Call horizon and give them proof of purchase and tell them what's wrong. They will take care of you

 

[moliver]

And since it's new that means warranty. Call horizon and give them proof of purchase and tell them what's wrong. They will take care of you

Thanks, will do that. Are they e-mail kinda people, or do I need to talk to someone? I hate talking.

 

[Rep732]

I have a first hand experience with the 2.0 warranty and honestly you get farther faster with calling them.... if you make sense and atleast made an effort to see what the problem is they have no issue with handing out parts. If not they have no issue walking you through to find the issue as well. But remember not everyone you talk to is completely familiar with the 5ive t 2.0

 

[moliver]

I have a first hand experience with the 2.0 warranty and honestly you get farther faster with calling them.... if you make sense and atleast made an effort to see what the problem is they have no issue with handing out parts. If not they have no issue walking you through to find the issue as well. But remember not everyone you talk to is completely familiar with the 5ive t 2.0

Thanks, don't really want parts, just need my brand new 5ive to not feel like the rear gear box isn't meshing correctly.

 

[Seandonato73]

It's a part issue, it should be silky smooth. You can go through e mail, to resolve the issue, but rep is correct, calling is much more effective.

 

[moliver]

I called, talked to someone, they are sending out a new trans case that will hopefully resolve the issue.

It wasn't too scary to talk to someone.

Thanks guys.

 

[Rep732]

Perfect resolution and sorry I stand corrected you have the 5b ?‍

 

[moliver]

I don't have an engine for it yet...if anyone has a not totally clapped out engine to just get this thing running, I would be interested. I have a DDM pipe that I picked up. Ideally it would just be a newish takeout motor from something. Servos too, I have a couple radios, ooops won ebay auctions.

Thanks guys.

 

[niz55]

Yep my front and rear on my 5ive b are little crunchy but I am pretty sure is because is new. Once is built snd driven it should break in just fine. You will get the same exact part and is still going to be the same. But hey you'll have an extra part.

 

[niz55]

I took the diff out and everything is good and I found the problem to the crunchy gear box. In order to fix the problem you have to use 1 shim inside just like the manual tells you and also use 2 more of the same size shim on the out side. Now it is butter smooth.

 

[moliver]

I worked with Losi a bit, seems like my ring gear on the diff got a little out of shape during installation, they sent a boat load of parts after just the tranny case didn't solve the issue. I reassembled using the new ring gear and an alum diff housing from China and its smooth again.

NIZ55 did your gearbox ever get better with some run time?

I haven't got mine running yet, its winter,

 

[21bangbang]

Thanks, don't really want parts, just need my brand new 5ive to not feel like the rear gear box isn't meshing correctly.

Welcome to 1/5 scale RC. Best to strip new RC's down before use and reasemble properly. Most companies suck at it. Once done right they're fairly reliable.

 

[niz55]

I worked with Losi a bit, seems like my ring gear on the diff got a little out of shape during installation, they sent a boat load of parts after just the tranny case didn't solve the issue. I reassembled using the new ring gear and an alum diff housing from China and its smooth again.

NIZ55 did your gearbox ever get better with some run time?

I haven't got mine running yet, its winter,

No it did not. It was still making the crunchy sound. The gears were perfectly fine though but needed to be shimmed.

 

[jetter]

I took the diff out and everything is good and I found the problem to the crunchy gear box. In order to fix the problem you have to use 1 shim inside just like the manual tells you and also use 2 more of the same size shim on the out side. Now it is butter smooth.

I had the same problem building up front and rear cases with all brand new parts. I was able to get it super smooth by adding two shims to the outside shaft of the pinion. I'm all out of shims and can only find these included with the pinion gear. Where do you get these shims seprately?

 

[jetter]

I had the same problem building up front and rear cases with all brand new parts. I was able to get it super smooth by adding two shims to the outside shaft of the pinion. I'm all out of shims and can only find these included with the pinion gear. Where do you get these shims seprately?

Found these pinion shims included in washer pack LOSB6535. Only includes 2 so may need more than one pack.