Grasshopper re-re different from original

[Tamiyastef 2875]

The threaded part of the re-re rear axles is remarkably shorter compared to the original ones. (Original is on the right, re-re on the left)

Not an issue using the kit wheels but as I'm building the re-re specifically for speed runs ( I don't want to put this kind of stress on my original) I want to use wheels with 12mm hexes. I used the aluminium 2015 Frog hex adapter for this on my original without any issues but on the re-re it seems not enough thread is left on the axle poking through the wheel to reach the locking part of the lock nuts 😪

Has anyone of you guys ran into this issue and how did you solve it?

 

 

 

[KEV THE REV 2437]

I had noticed on the vintage models that the shafts varied slightly , old Pajero to Lunchbox etc , basically the same but small differences . I've not come across this on re-re yet , but you can obtain 4mm ny-loc nuts that are thinner than Tamiya ones and that might work out for you . I have used these on different applications , but not on GH re-re - yet .

[Tamiyastef 2875]

I measured not more than 3mm thread is protruding from the mounted wheels. I might try to drill out the aluminium hex adapter as it seems it's hung up on this part.

[KEV THE REV 2437]

Can you see if the rear of the adapter sits on the drive pin ? there might be a too larger gap between the rear of the adapter and the axle bearing than normal . If there is a large gap then what you are saying could work . If the pin is located already then it can't move any further back . Also check that the drive pin is not binding inside the adapter before you drill anything .

The GH2 rear axles have a different part number to the GH1 and look very similar at the thread end to your old GH axles . Not sure of the o/a dimensions of the axles in comparison to each other but maybe someone could check , it could be a solution at a push

[Tamiyastef 2875]

It sits on the drive pin but not completely. First picture is the original the second one the rere. It's hard to get a good picture of this but as far as I can see the space for the drive pin in the adapter is deeper than the pin actually sits on the rere that is, on the original the drive pin can't go any further. 

Hope this makes sense.  

I have a pair of GH2 rear axles but they are exactly the same as the rere ones so maybe ( I can't remember if rere's were already around when I bought these) they're from a rere GH or GH2, and not from an original. 

I'll check my LHS for another pair of aluminium hex adapters, so when I ruin them I still have a useful pair left 😁

[KEV THE REV 2437]

If you take out the drive pin , does the pin drop into the adapter ? . I've got an adapter here and the pin drops in freely to about 3mm or so inside the adapter , more than your picture shows , so it does look like it is binding at the front , unless your pin doesn't drop into the adapter , then it's a pin problem

GH2 re-re axles :-

[Tamiyastef 2875]

The pin does drop in freely in the adapter and I took another (and better) look at my spare GH2 rear axles and they are not at all the same as the rere ones. 🤪 They have even longer treads on them than the original ones...So I presume I compared 2 rere axles before thinking one was a rere and the other one was the GH2 one as they are obviously different.  

Problem solved by taking the rear gear case apart (again) and changing the axles for GH2 ones. Thanks for Your help 👍 

[Frog Jumper 3916]

2 hours ago, Tamiyastef said:

I measured not more than 3mm thread is protruding from the mounted wheels. I might try to drill out the aluminium hex adapter as it seems it's hung up on this part.

I had this issue with the Frog adapters. I got a set of generic Chinese hex adapters without the shoulder in the Tamiya version. 

[KEV THE REV 2437]

4 minutes ago, Frog Jumper said:

I had this issue with the Frog adapters. I got a set of generic Chinese hex adapters without the shoulder in the Tamiya version. 

Nice one . I was going to suggest this if the previous suggestions didn't work out . I've got some here that I used for some LB mods,  but needed to find them first to have checked the fitment .  

[El Gecko 1556]

2 hours ago, Tamiyastef said:

I might try to drill out the aluminium hex adapter as it seems it's hung up on this part.

I didn't have spare axles so I had to drill a few of my hex adapters like that. A lot of them have 4mm holes, but our axles are all 5mm.

[Tamiyastef 2875]

I've got me some spare adapters so will drill the adapter instead of changing the axles I think 😁

[Tamiyastef 2875]

Non drilled adapter

[Tamiyastef 2875]

Drilled adapter

[Tamiyastef 2875]

Drilled one on the right. Thanks guys for your responses!

Now a normal size locknut works perfectly. LHS had "low profile" locknuts in M3 only. 

[Frog Jumper 3916]