Is this normal??
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New User
Joined: Oct 2003
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Is this normal??
I have a 1998 F150 with rear anti-lock brakes. I had the rear end up on jack stands and I placed the unit in drive , now I spin the tires up to about 30 or 40 mph and when I apply the brakes at this speed it I have to apply a considerable amount of pressure to stop the wheels from turning and during this period the peddle has a slight pulsation. I am assuming that this is normal with antilock brakes, they appear to work fine during normal driving. Also the rear end is a limited slip differential.
Post Fiend
Joined: Jun 2002
Posts: 13,873
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From: Atlanta GA
> I had the rear end up on jack stands and I placed the unit in drive
> , now I spin the tires up to about 30 or 40 mph and when I apply
> the brakes at this speed it I have to apply a considerable amount
This is so wrong to do, I do not know where to start and I do not have enough time to reply in full. Just do not do it, you will end up destroying your truck and maybe even causing injury.
> , now I spin the tires up to about 30 or 40 mph and when I apply
> the brakes at this speed it I have to apply a considerable amount
This is so wrong to do, I do not know where to start and I do not have enough time to reply in full. Just do not do it, you will end up destroying your truck and maybe even causing injury.
The Pacifier
Joined: Jan 2003
Posts: 8,245
Likes: 7
From: Cloverdale, BC
There may be a sensor on the front wheels telling the ABS controller that the front is locked up, and trying to compensate for that.
As for the danger issues, Rebocardo is right on the money. I don't care if it is on jack stands and the front wheels are blocked. The truck can still rock itself off the stands and land on the ground just in time to wreck something or someone. If it did somehow rock itself off the jackstands with the wheels spinning at 30 - 40 mph, just remember the truck is "supposed" to be driving down the road at 30 - 40 mph, and will drive through a garage wall, or down the driveway into the road when (not if) it falls off the jack stands.
As for the danger issues, Rebocardo is right on the money. I don't care if it is on jack stands and the front wheels are blocked. The truck can still rock itself off the stands and land on the ground just in time to wreck something or someone. If it did somehow rock itself off the jackstands with the wheels spinning at 30 - 40 mph, just remember the truck is "supposed" to be driving down the road at 30 - 40 mph, and will drive through a garage wall, or down the driveway into the road when (not if) it falls off the jack stands.
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