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WTB: 19-tooth 3.63 White Speedo Gear

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Old Apr 1, 2026 | 06:41 PM
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18tyweslow's Avatar
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Default WTB: 19-tooth 3.63 White Speedo Gear

Hey all, I recently picked up a Torsen 3.63 to put into my car.

Anyone got a hookup for a 3.63 speedo gear? PN# M502-17-441, 19 tooth, white.
Old Apr 1, 2026 | 10:20 PM
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The 19T speed sensor for the 3.63 diff should have a blue gear, the white gear is 20T meant for the 3.909 diff. I have a blue gear VSS if you're interested.
Old Apr 1, 2026 | 10:36 PM
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Originally Posted by TheMiataOwner
The 19T speed sensor for the 3.63 diff should have a blue gear, the white gear is 20T meant for the 3.909 diff. I have a blue gear VSS if you're interested.
Thanks for commenting! I was under the impression the 19T gear designed for the NA mechanical speedo sending unit was white, where as the NB electric speedo sender designed 19T gear was blue.

I was also under the impression that the NB senders could not have their gears removed to be placed in the NA sender housing, which is what I'd be doing.

Any idea?
Old Apr 1, 2026 | 11:01 PM
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Originally Posted by 18tyweslow
Thanks for commenting! I was under the impression the 19T gear designed for the NA mechanical speedo sending unit was white, where as the NB electric speedo sender designed 19T gear was blue.

I was also under the impression that the NB senders could not have their gears removed to be placed in the NA sender housing, which is what I'd be doing.

Any idea?
Ah, mine is for an NB so it won't be compatible with your cable driven system. I've heard conflicting accounts of whether the gear is swappable on the NB sensor, but it does look like it's held in with just a snap ring/clip. Best of luck.
Old Apr 2, 2026 | 08:57 AM
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Originally Posted by 18tyweslow
Hey all, I recently picked up a Torsen 3.63 to put into my car.

Anyone got a hookup for a 3.63 speedo gear? PN# M502-17-441, 19 tooth, white.
I put a 3.63 in my nb2 and my speedo was more accurate compared to GPS afterwards. I think not running 15" w/ 50 sidewalls made a difference.
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