Brakes

[tx_pwp5]

Hey everyone,

I have a semi-weird issue going on when I brake and I wanted to bounce it off you guys still running drums.

Brakes work fine under normal operating, but when in stop and go traffic, a weird thing happens.

You push the break to slowly come to a stop, and its like when you stop short at a stop sign, the vehicle continues forward slightly, then springs back into place kind of jarring you back and forth. Its not violent or anything, but I have noticed and now I can't un-notice.

I'm wondering if maybe this is happening because the spring kit in the rear drums is worn out. Would that allow everything to shift slightly as the breaks are used?

 

[ford4thot]

Could it be play in the drive train? And not related to the brakes?

 

[RonD]

Yes, if an automatic try shifting into neutral before coming to a stop and see if you notice a difference.
You have a computer controlled torque converter lock/unlock on that year, called TCC(torque converter control).

Rear brakes are not used much unless you really stomp down hard on the brakes.
In a pick up the proportioning valve is usually 70/30, front brakes get 70% of master cylinder pressure, rear 30%

Cars are 60/40

Could be a front caliper is sticky, applies pressure then sticks slightly and then releases applying extra force.

 

[Tedybear]

I'd also double check control arm bushings and associated parts.

If you have something worn, it could be spring loading itself and when the pressure releases-That can cause a slight jarring action.

It's rare, but sense you'll be looking over brake parts anyway? Might be worth checking.

S-

 

[adsm08]

My truck does this like 75% of stops. I never thought anything of it beyond "Hey, it's a 30 year old truck, they weren't designed to be luxury vehicles."

If I really watch the brakes I can stop it perfectly smooth, but it just isn't how I normally come to a stop.

 

[tx_pwp5]

My truck does this like 75% of stops. I never thought anything of it beyond "Hey, it's a 30 year old truck, they weren't designed to be luxury vehicles."

If I really watch the brakes I can stop it perfectly smooth, but it just isn't how I normally come to a stop.

This is exactly what I've been doing as well. It works, but just like anything else, after your notice it happening it starts bugging you.

 

[tx_pwp5]

Yes, if an automatic try shifting into neutral before coming to a stop and see if you notice a difference.
You have a computer controlled torque converter lock/unlock on that year, called TCC(torque converter control).

Rear brakes are not used much unless you really stomp down hard on the brakes.
In a pick up the proportioning valve is usually 70/30, front brakes get 70% of master cylinder pressure, rear 30%

Cars are 60/40

Could be a front caliper is sticky, applies pressure then sticks slightly and then releases applying extra force.

I'll do the neutral test on my way home today.

If that fixes the issue (I have wondered if it could be in the driveline, but didn't know where to start other than the U-joints or something) then would that mean I need a new torque converter?