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3 and 4 channel help please

This is a discussion on 3 and 4 channel help please within the Drivetrain forums, part of the LSx Technical Help Section category; do i have this correct that a 3 channel is abs and 4 channel is abs and tcs? and if ...

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    3 and 4 channel help please

    do i have this correct that a 3 channel is abs and 4 channel is abs and tcs? and if i have no tcs and buy a 4 channel rear my abs works and the tcs capability of the rear is just not used?

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    Veteran 0rion's Avatar
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    3 channel has the reluctor in the pumpkin..... 4 channel has the reluctors on the axles. What I'm not sure of is if the reluctors being on the axles will effect how it fits out there. I'm not sure if the backing plates are different or not. I want to say they're different but I'm not positive. Hopefully someone that knows 100% for sure will chime in.

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    Quote Originally Posted by 0rion View Post
    3 channel has the reluctor in the pumpkin..... 4 channel has the reluctors on the axles. What I'm not sure of is if the reluctors being on the axles will effect how it fits out there. I'm not sure if the backing plates are different or not. I want to say they're different but I'm not positive. Hopefully someone that knows 100% for sure will chime in.
    ok are you saying its not tcs, rather 2 front wheels and 1 rear axle, as opposed to 2 front and 2 rear wheels? at least i know that you can tell by looking at it. [ i forgot to ask that] or is the abs sensing moved out to the wheels with tcs when equiped with it. maybe im making this more difficult than it is.
    Last edited by dklowrider; 04-15-2009 at 03:20 PM. Reason: new thought

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    Senior Member Orcus79's Avatar
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    The abs with TCS equiped cars is monitored by the two wheel speed sensors mounted to the backing plates on the rear axles. Non TCS cars the ABS is monitored by the single sensor mounted to the pumpkin. The two systems as far as I know are not interchangable unless you swap BCMs as well.

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    Quote Originally Posted by Orcus79 View Post
    The abs with TCS equiped cars is monitored by the two wheel speed sensors mounted to the backing plates on the rear axles. Non TCS cars the ABS is monitored by the single sensor mounted to the pumpkin. The two systems as far as I know are not interchangable unless you swap BCMs as well.
    i cant imagine there being any fitment issues, just if i put a 4 channel in a non tcs car i lose my rear abs, or the entire abs system. ?

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    Senior Member Orcus79's Avatar
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    Fitment will be the same as far as the axel goes and you may have to redo your brake lines but I am not certain on that if the rear brakes on a non TSC car have a shared line or independent lines.

    You will lose all your ABS, which isn't bad thing as having only from ABS can be more dangerous.

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    Quote Originally Posted by Orcus79 View Post
    Fitment will be the same as far as the axel goes and you may have to redo your brake lines but I am not certain on that if the rear brakes on a non TSC car have a shared line or independent lines.

    You will lose all your ABS, which isn't bad thing as having only from ABS can be more dangerous.
    ill have to check the lines, probably tee's off at the rear end unless they run the lines the same on all of them. losing abs wouldnt be a bad thing, i still dont have the hang of just standing on the pedal and letting the car do the thinking anyway.

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    autoconnectionllc.com 02transamce's Avatar
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    so i have a 02 ws6 with abs and tcs,does that mean i have 4 channel abs?

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    more than likley

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    11's "CLUB" SS SLP2's Avatar
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    Quote Originally Posted by 02transamce View Post
    so i have a 02 ws6 with abs and tcs,does that mean i have 4 channel abs?
    correct
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    Member Rk ws6's Avatar
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    i have a 2001 trans am with no tcs and im guessing its got abs lol so this is 3 channel...?

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    autoconnectionllc.com 02transamce's Avatar
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    Quote Originally Posted by SS SLP2 View Post
    correct
    Johnny
    thank you,this info will help when i order my strange s60 rear axle.

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    Quote Originally Posted by Rk ws6 View Post
    i have a 2001 trans am with no tcs and im guessing its got abs lol so this is 3 channel...?
    yes.

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