I will be replacing my speed sensor pinion, but I'm gonna ask for help first. . .

First let me ask for a favor, then i'll explain. I need anyone who has a speed sensor laying around to look at it for me and help me answer these questions.

THANK YOU!

Second of all let me tell you guys whats going on. I installed a lower gear VLSD. The new ratio is 4.36, verified. 48:11. I now need to correct my speedometer readings.

I have a M/T 93 coupe w/ a KA24DE. According to Courtesy parts The pinion has either 20 or 21 teeth on the pinion:

[32703] PINION-SPEEDOMETER
240SX (S13) 32743-S13003 20T F/SPORT PAK

or

[32703] PINION-SPEEDOMETER
240SX (S13) 32743-S13004 21T


I am guessing i have the sport pack, anyone can correct me if I am wrong.


Now what i plan on doing is replacing my speed sensor pinion with one with 21 teeth.

If anyone has one laying around please snap a picture and count the teeth on it for me and please let me know which year it came out from.

You don't know how much this will help me figure out my problem.

Please ask any question.

And don't diss me for trying.

Thanks guys,
RickY

 

Hey man, sorry i couldn't make it over there to help you swap that out. We'll have to get together sometime again. I got my car legal again. INSURANCE, REGISTRATION AND INPECTION YEAAAAAAH! anyways......


Someone help this guy out. Doesn't anyone have any input, Come on guys. He needs some help.

 

I changed the little gear on the speed sensor because the red car has an LSD with the 4.36 gear ratio for faster acceleration.
With the orginal gear from KA diff, the car showed the speedometer 3-5 miles higher than the real speed.
So I did some research, and the TT 300zx guys who swap a N/A differential have a similar problem.

They fix the problem by just changing the gears. I found Courtesy nissan to sell two gears, one with 20 teeth, and one with 21 teeth for the s13.


[32703] PINION-SPEEDOMETER
240SX (S13) 32743-S13003 20T F/SPORT PAK

or

[32703] PINION-SPEEDOMETER
240SX (S13) 32743-S13004 21T

So I bought the one with 21 teeth ^

After swaping in the engine it reads the correct speed.

So if anyone swaps in a differential with lower gears, like the 4.36, (i thinkg from some of the JDM 180s) you can do this so you don't have to send out your gauge cluster to have it adjusted/reprogrammed.

 

so was is reading fast before? mine has been reading 15mph fast ever since i bought it but have never bothered looking into the problem.

 

Jesus, It was reading high but not that drastically. It would read higher the faster you travel. For example, at low speeds (10 - 30) it would only be 1-2 mphs, and at higher speeds (60-80) 5-6 mphs.

 

i see.

 

lol i really dont care 1-2mph or 5-6 mph range would be accurate enough for me atm i have no idea if im accurate dosnt bother me much