Th400 speed sensor
Th400 speed sensor Does anyone know where to get a electronic speed sensor for a th400. Really having trouble finding one.
Gm part # 8655291
Standard part # sc191
Gm part # 8655291
Standard part # sc191
AC DELCO SPEED SENSOR PART # 24232618
AC DELCO ROTOR PART # 8655315
AC DELCO PLUG 12085498
CK PERFORMANCE SENSOR PART # 400-SP/VSS
CK PERFORMANCE ROTOR PART # 400-SP/VSSR
CK PERFORMANCE PLUG PART # 400-SP/VSSC
AC DELCO ROTOR PART # 8655315
AC DELCO PLUG 12085498
CK PERFORMANCE SENSOR PART # 400-SP/VSS
CK PERFORMANCE ROTOR PART # 400-SP/VSSR
CK PERFORMANCE PLUG PART # 400-SP/VSSC
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Ill be doing this soon, I have the abs delete already. Anyone know how I will be doing the speed sensor? TIA
I'll put this here also since they go hand in hand. https://ls1tech.com/forums/gears-axl...-end-swap.html
Last edited by tug686spd; Apr 4, 2017 at 09:02 AM.
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Teching In
Joined: Oct 2019
Posts: 44
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From: Phantombullet
I found a unicorn out in the wild...
I wonder why nobody makes these 8655291 / 24232618 new anymore? The older 4l60 ones are everywhere new.
Compared to early 4l60 sensor here... the 60 sensor is a little shorter, and the OD is larger. If the 60s OD was milled down and it was pushed in a little further it seems like it would be about in the right place to perhaps pickup a signal. Of course the bracket is wrong too so that would need some work.
I wonder why nobody makes these 8655291 / 24232618 new anymore? The older 4l60 ones are everywhere new.
Compared to early 4l60 sensor here... the 60 sensor is a little shorter, and the OD is larger. If the 60s OD was milled down and it was pushed in a little further it seems like it would be about in the right place to perhaps pickup a signal. Of course the bracket is wrong too so that would need some work.
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I ran across this thread doing a search. Does anyone have in their possession the GM 24232618 VSS sensor? It can be a broken one.
I am going to see about designing the sensor body and 3D printing it and using an alternate VSS, like for a T56. Some thing like this:
Thanks!
Andrew
I am going to see about designing the sensor body and 3D printing it and using an alternate VSS, like for a T56. Some thing like this:
Thanks!
Andrew
TECH Addict
Joined: Dec 2004
Posts: 2,178
Likes: 627
From: Florida
It wouldnt be too hard to just design one if you had a th400 in front of you. i actually have this exact project on my list to make next time i have the wagon in the air.
problem i see is i only have a 3 axis machine so its going to be a bunch of ops or two pieces?
anyway, if i ever make them ill let you know. the plan would be to sell them.
problem i see is i only have a 3 axis machine so its going to be a bunch of ops or two pieces?
anyway, if i ever make them ill let you know. the plan would be to sell them.
TECH Junkie
Joined: Dec 2012
Posts: 3,621
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From: Iowa
ABS 3d print with Acetone layer smoothing as post-process would be fluid-tight
Could use stock O ring
and would be capable of temps needed for that area of the trans.
Most ABS filament has a glass transition temp of 220 ish F
And a true melting temp of 400+
It would certainly be worth a try!
I may draw up 2 varieties. One with a VR sensor which would work with stock pcm's
then another with a Hall effect sensor which is better suited to work with aftermarket (holley/haltech/etc) ecu's
Could use stock O ring
and would be capable of temps needed for that area of the trans.
Most ABS filament has a glass transition temp of 220 ish F
And a true melting temp of 400+
It would certainly be worth a try!
I may draw up 2 varieties. One with a VR sensor which would work with stock pcm's
then another with a Hall effect sensor which is better suited to work with aftermarket (holley/haltech/etc) ecu's
TECH Addict
Joined: Dec 2004
Posts: 2,178
Likes: 627
From: Florida
ive never successfully FDM 3d printed a watertight model, even experimenting with different post processes. maybe its better now but when i was doing it, we were using a legit $250k fortus printer and expensive material. i work in maritime though so the standards may be higher than whats needed for a transmission.
TECH Junkie
Joined: Dec 2012
Posts: 3,621
Likes: 1,335
From: Iowa
Only one way to find out 
Alternatively, an easier solution (especially for aftermarket ECU's) is to use a driveshaft ring and sensor setup. They're super common and reliable.
If you must use the OEM wheel for tooth count on a stock ECU, you can get a 3/8 threaded VR sensor, and cleverly drill/tap the case to align that sensor with the ring. Not as pretty, but much more affordable than tracking down a 20 year old sensor that may be a crap shoot.
Alternatively, an easier solution (especially for aftermarket ECU's) is to use a driveshaft ring and sensor setup. They're super common and reliable.
If you must use the OEM wheel for tooth count on a stock ECU, you can get a 3/8 threaded VR sensor, and cleverly drill/tap the case to align that sensor with the ring. Not as pretty, but much more affordable than tracking down a 20 year old sensor that may be a crap shoot.
Registered User
Joined: Jun 2024
Posts: 1
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From: Orlando FL
Thanks!