65mechanic

Hey guys. I'm trying to find the thread sizes for the inlet and the outlet on my Rear ABS Valve so I can bypass (FOR TEST PURPOSES ONLY) it to see if it fixes a brake problem I'm having. One thread size looks bigger than the other and looked very similar to the master cylinder thread sizes, so I was able to find the master cylinder thread sizes. That might be somewhere to start.

Here is Oreilly's Auto Description on the Master cylinder:
Primary Port Thread Size: M18X1.50
Secondary Port Thread Size: 9/16-18 Inch

Does it make since for one to be metric and the other standard? I've got some brake line, a flare tool, and a brake line tubing bender, so I'm just needing the thread sizes so I can go buy some fittings. Thanks guys.

Chris_1

iTrader: (1)

On a 95 the one going to the back from the rabs is standard 3/16 brake line

Chris_1

iTrader: (1)

If you're planning what I think you're planning, A short piece of gas line with double clamps will hold enough pressure just to see if it makes a difference

Just call me Sean

iTrader: (1)

You said flare tool, you need a double flare tool. Brake lines are double flared.

That RABS unit is mostly for decoration anyways. I've never felt one work.

65mechanic

Thanks, but I need the thread sizes for the abs valve. I've already got some 3/16 brake line at the shop.

That sounds kinda jank. I'd rather have fittings that connect. It's a big truck, I dont wanna lose my brakes.

Yeah, thanks for the double clarification

Chris_1

iTrader: (1)

No you wouldn't want to lose brakes. I was thinking a parking lot test to see if it makes a difference.
If both lines are 3/16, the back one should screw into a union as is, cut the flare off the front one, put a different fitting on and reflare to screw into the union. Have to do it again in reverse to hook it back up, but the front line has plenty of extra in the coil-up

65mechanic

Put a junkyard Rear ABS valve on the truck. Fixed!

Vette117

I agree, my truck will lock the rear wheels even with the slightest brake pedal on ice.. I believe the only thing it was there for was to add another selling point to the truck when they were new.

65mechanic

Haha. Yes. I actually locked up my brakes last night to test it (couldn't do that beforehand). I've never felt 35s jump like that before. Geez. Talk about brake hop.

Vette117

It just snowed here yesterday actually, and it was slick as hell under the snow, so I got to have some fun with that. Crappy radials with like 4% tread + RWD = Fun In The Snow.

Actually found myself driving through part of someones yard going downhill. Too slick for full brakes, so I was pumping like crazy at first, but gave up on them and just let the clutch back out and had the engine brake a bit and just coasted down the hill.


Throughout my whole day and night of wreaking havoc throughout my town, I never once felt, or heard the ABS.


On another note, I saw at least 6 or 7 near-accidents, and 2 actual accidents. Most of them were due to people holding their brakes. I don't understand how people don't realize that locked up tires have less traction than rolling tires, even on ice/snow. I know it's just reaction sometimes, but holding them ALL the way down a hill... Stumps me.