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Thread: b15 speedo sensor in b14 trans

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2016-02-07 00:33:13
b15 speedo sensor in b14 trans
Hey Everyone,

I have been looking high and low for a damn electronic speedo sensor. I found a b15 with a rr sr20 and a manual lsd tranny at the junker today. I pulled the sensor and got it home to find out the gear has 34 teeth vs the 36 on my cable b13 sensor that I had in the b14 tranny...I am no gear expert but the gear outer diameter is the same on both, so I assumed it wouldn't mesh with the plastic diff gear. I test fit the b15 sensor in and the axle still spins by hand...has anyone done this with no issues? Doesn't quite make sense to me but it has been a long day. Thanks for any help.

2016-02-07 02:03:40
Well going by the theory that a b14 or b13 sensor swaps into a b15 trans, I see no problem other than maybe the harness connector or possibly reading the wrong speed (maybe that's the difference in the teeth count?).
2016-02-07 02:07:13
Also I have a brand new OEM electric speed sensor for sale if you're interested.
2016-02-07 14:11:16
Thanks allot for your input Dave, I think you might be correct and I follow your logic. Could be an adjustment for different wheel sizes? I guess as long as the gear angle is the same it will not ruin itself. I read a few horror stories of sensors from auto trannys getting torn up inside the tranny...I just finished rebuilding it, not really looking to take it apart again.

I will definitely let you know when I find out if this thing will work our not...should be soon.

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