I recently went from 2.73 to 3.42 gears in my 86 Firebird

Found out (afterward) that the original metal shaft/plastic gears are not available, but could be swapped over using TH350 bullet and plastic gears.

Well - I pulled the VSS off my 86 Today, and it looks like my assembly is all one unit - the bullet and the sensor don't look like the come apart. In fact, I can't see any way to disassemble it at all.

Anyone know if this is normal? Am I just missing something?

I need to get those gears changed because my speedo is way off!

Thanks!

https://www.thirdgen.org/forums/prof...do=editprofile

That's where you add what your vehicle is.

I'd have not provided info I did in you prior thread if you had 86 F-bird indicated.

You are talking about a VSS that has a plug on it .........not a cable drive unit ?

A VSS is completely different to a speedo drive ( TH350 style ) that uses the bullet and gears with a shaft on them .
On a VSS you just slide the gear off the shaft and replace it; no dis-assembly required
If you are swapping to a cable speedo then you use nothing from the VSS


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Correct. My car has a VSS not cable drive. My setup doesn't look exactly like that, but similar.

I'll fill that out.

I don't see how that gear comes off... mine slides up and down, but doesn't appear to actually come off?

So now what do I do? Where do I get a 20 tooth gear for this unit?

Correction looks like I need the 19 tooth white gear...

what tire size?

normal 26 inch (225 60 15)

If they're he same height as a 215/65R15 you're fine with a 20.
If they're more like the height of a 195/75R14 or 205/70R14, go with a 19.

Might have a 19 w/ steel shaft (remove it to use on a VSS) if you're looking for one.

The inner diameter of the gear has a ridge that holds it on the VSS and the flat side to prevent spin.

my 86 with 700r4, the stock plastic gear just slides of the sensor shaft.
I bought my gears off ebay as they were discontinued from gm.

If you do, I'd be happy to pay you for it! That will get me much closer!

Didn't find the 19, only a 21 and 22.