VSS - keep or what...

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Mar 30, 2016 | 02:16 PM

jrodimus

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Senior User

Joined: Jan 2010

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VSS - keep or what...

Rebuilding a sterling 10.5. Doing a hydroboost brake swap. Disc brake swap on the sterling. Do i need the tone ring for anything other than ABS? I thought speedo gear is in t-case. I would like to not use the tone ring as the old one is damaged and I dont want to get another.

Mar 30, 2016 | 03:08 PM

subford

Fleet Owner

Joined: Aug 2005

Posts: 23,668

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From: Easton,Ks

In a 1991 the tone ring is only used for the RABS.
So I would say you do not need it.

Mar 30, 2016 | 08:01 PM

Conanski

FTE Legend

Joined: Jun 2006

Posts: 31,930

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From: Ottawa, Ontario

What transmission? If the truck has a manual or C6 you are clear but if it's got an E4OD then maybe not. I know the speedo is cable driven in a '91 but I'm not certain where the electrical speed signal for the PCM is derived from.. if it also comes from the trans or t-case or if it comes from the rear axle sensor as it does in the later trucks.