speedo gear 6x18 vs 6x16

[EastCanFJ62]

My speedometer in my fj62 stopped working awhile ago and found it was my speedo gear, the cable is fine. Finally ordered new one and they told me since I was running 31" tires to use the 6x17 gear instead of the stock 6x18. I installed the 6x17 and it didnt work. They told me it their mistake and sent me 6x16, which doesnt work. I cant see any other way of putting it back together.. Does the plastic sleeve, that came with the new gear, fit somewhere in the equation? any thoughts on this?

thanks

 

[GLTHFJ60]

Where did you order these parts from? I was not aware that you could change the speedo driven gear.

 

[EastCanFJ62]

Where did you order these parts from? I was not aware that you could change the speedo driven gear.

cruiser parts http://shop.cruiserparts.net/index.php?main_page=index&cPath=4_3568_5726_3606

 

[GLTHFJ60]

I see what you mean. What do you mean that the 6x17 gear "didn't work"? Have pictures of what you've disassembled and attempted to put together?

I'd check myself but my only speedo drive is installed in my 60 right now.

 

[EastCanFJ62]

It didnt work meaning my speedometer didnt work. I have a pic of the 6x17 beside the stock chewed up one. and the link i sent is what was in with the gear.

 

[GLTHFJ60]

I don't understand how this would work. The speedo drive gear won't change diameter, and you cannot set the depth of the driven gear in the transfer case, so if you decrease the diameter of the driven gear then you'll decrease your gear mesh until they aren't touching at all.

Their site says it will work, but did they say that the drive gear had to be changed as well?

The Dana 300, and other cases, have interchangeable gears but the driven gear housing can rotate to restore the gear mesh between drive and driven gears. The LC speedo drive can't do that.

Are you sure that you assembled the drive assembly with the new gear correctly? Did the speedo move at all?

 

[EastCanFJ62]

It didnt make sense to me that if the gear was smaller it would still work. I asked them about this and even sent them a picture of the two side by side but he told me that the guys in service told him it would work...I'm fairly certain I assembled it correctly speedo didnt move, but will check again once my wife gets in with it. I've checked the fsm but its pretty vague on the speedo gear. I'll contact them on monday and see what they say.

thanks for your input, its appreciated.

mark

 

[GLTHFJ60]

No problem Mark!

Another thing I'd test if you can is that you take the cluster out and look at the speedo cable while driving. Do this during the day (hope that's obvious). You should see the square cable spinning inside the sheathing. If it's not, then either the speedo drive assembly isn't assembled correctly or the driven gear isn't in contact with the drive gear (if that makes sense).

Keep us posted!

 

[EastCanFJ62]

This morning before I put the 6x16 gear in I took a small cordless drill and attached it to the end of the cable and turned it on and the speedometer worked got video to prove it! Would like to get this working, tired of using the app on my phone.

mark

 

[GLTHFJ60]

If you just want it working, get a stock size speedo driven gear and put it in. Doesn't make sense to me that a different diameter driven gear would work without changing the drive gear.

 

[EastCanFJ62]

I agree, the thought was nice that it would work. Thanks man

 

[Slow Left]

I wonder if, when you are installing the gear drive, it's not seating all the way in. Notice how the gears are at an angle. So when you install it, when the gears on the gear drive will rotate as it mates with the teeth on the output shaft of the transfer case (just like when installing a distributor). You should notice whether or not the gears are meshing correctly because the slotted pin that the speedo cable connects to should also rotate slightly.
I also imagine that you'll feel a pop when the end of that plastic gear sits correctly in the other side of the transfer case housing...

I don't know if it is better to put pressure on the housing of the pin or maybe try with a single slot screw drive on the slot of the pin itself, but then you've got to be sure you are rotating in the right direction.
EDIT: or you could also try a hollow tube with an ID larger than the OD of the pin, but also with an OD (of the tube) smaller than the ID of the transfer case housing...slide it over the pin and push directly onto the face of the plastic gear until it rotates and seats itself...
Also, remember that the tolerance is going to be tighter than the old one you pulled out since the gears are made of plastic and the old one has probably worn down considerably.

Did you dip the plastic gear in gear oil first?

Just a thought...

 

[EastCanFJ62]

I remembered that the fj62 frame and motor I picked up last week has a transfer case and may have the stock gear in it. It was about a 45 min drive to where I have it stored and since I just got it I never thought about it. I went up this afternoon and sure enough there was a stock speedo gear in the transfer case. Got home, put it in, felt it seat properly, and I now have a working speedometer! (I even tried the 6x16 again just in case but it was a no go..)

thanks again for the advice johnny you were right about the size and slow left thanks for the advice, I took better care installing it this time around.

so long story short, using a different size speed gear besides stock to compensate for bigger tires did not work for me. Did it work for anyone else?

 

[Chester]

not sure I'm following this right. usually, the "count" refers to the number of teeth, the number of hill and dale pairings, diameter of the gear doesn't change. This isn't right in this case?

 

[EastCanFJ62]

not sure I'm following this right. usually, the "count" refers to the number of teeth, the number of hill and dale pairings, diameter of the gear doesn't change. This isn't right in this case?

I thought that this would be the case, but if you look at the stock gear on the right and the 6x17 on the left in post# 5 they definitely are not the same size. Not sure why that is.

 

[Godwin]

Did you receive a Toyota gear or an aftermarket one?

 

[EastCanFJ62]

I believe so, packaging said it was toyota

 

[GLTHFJ60]

not sure I'm following this right. usually, the "count" refers to the number of teeth, the number of hill and dale pairings, diameter of the gear doesn't change. This isn't right in this case?

If you're keeping the tooth pitch the same, then decreasing the number of teeth does decrease the diameter of the gear.

 

[Chester]

If you're keeping the tooth pitch the same, then decreasing the number of teeth does decrease the diameter of the gear.

Many years have passed, but I was able to buy a driven gear with a lower thread count, which was the same diameter, fit correctly, and it's been working ever since. And I think the Toyota parts guy suggested 17, but had 16 available as well.

 

[EastCanFJ62]

Many years have passed, but I was able to buy a driven gear with a lower thread count, which was the same diameter, fit correctly, and it's been working ever since. And I think the Toyota parts guy suggested 17, but had 16 available as well.

Okay, so the correct ones are out there..The one I have is maybe for different year? model? Just one more picture of the stock gear on left compared to the 6x16 I have..