Speed sensor question

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Jan 28, 2021 | 09:08 PM

CurtLarson

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Speed sensor question

On an 88 f250, is the speed sensor on the rear axle for the ecm or the abs? I’m using the engine, trans, t case and wiring from one for a truck project and wondering if the ecm will miss that. Or can a just use the speed sensor for the cruise on the speedo output?

Jan 29, 2021 | 04:32 AM

EPNCSU2006

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From: Concord, NC

My understanding is the rear axle speed sensor is only used for RABS on a '88.

Jan 29, 2021 | 05:43 AM

CurtLarson

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That’s what I was hoping to hear!

Jan 30, 2021 | 06:25 AM

tjc transport

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88 used transmission/transfer case tailshaft speed sensors only.

Jan 30, 2021 | 08:47 AM

My4Fordtrucks

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Quote:

Originally Posted by EPNCSU2006

My understanding is the rear axle speed sensor is only used for RABS on a '88.

Correct. The sensor in the rear differential is only used by the ABS.

Quote:

Originally Posted by tjc transport

88 used transmission/transfer case tailshaft speed sensors only.

My ‘87 Bronco had a sensor in the 8.8 axle for the RABS. When the bearings failed I deleted it for a 9” with lower gears. The speedometer is driven off the transmission/ transfer case.

Jan 30, 2021 | 02:06 PM

rla2005

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From: Kentucky

Quote:

Originally Posted by tjc transport

88 used transmission/transfer case tailshaft speed sensors only.

I do not recall when RABS was a standard feature.....

Jan 30, 2021 | 02:12 PM

tjc transport

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From: Marlboro Mental Hospital.

load weight sensor RABS started in 85 or 86.
electronic RABS started in 87.,,, and was pretty much useless.
4 wheel ABS started in 99 on ford pickups.

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Jan 30, 2021 | 06:11 PM

My4Fordtrucks

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Quote:

Originally Posted by tjc transport

load weight sensor RABS started in 85 or 86.
electronic RABS started in 87.,,, and was pretty much useless.
4 wheel ABS started in 99 on ford pickups.

I have had it activate but no it doesn’t work like more modern systems.

Four wheel ABS was available on Broncos. The ‘94 had it.

Jan 30, 2021 | 06:43 PM

#10

CurtLarson

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Mountain Pass

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I appreciate the help!! Thank you!!!

Jan 30, 2021 | 07:08 PM

#11

Smokerr

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electronic RABS started in 87.,,, and was pretty much useless

Yep, never had it do anything on the 95

Four wheel ABS was available on Broncos. The ‘94 had it.

I finally got it to work on the 95 Bronco when we got Blizzak tires, even studded did not have enough grip to activate.