Recent posts

#11

Chevy - GMC Chassis / Re: 1984 CHIEFTAIN P-30, REAR ...

Last post by johnfrederick - April 22, 2024, 06:19 AM

Thanks, Eyez. That makes sense.

I installed the new master cylinder about a year ago. It was bench bled and installed.

#12

Chevy - GMC Chassis / Re: TH 475 Takedown & Inspecti...

Last post by RockwoodMike - April 22, 2024, 01:04 AM

this 475 I have shifts like a sledge hammer now I really like that needless to say

That is something that is nice about automatic transmissions..You can make it shift like a soft pillow or like the hammer of Thor..

That is what kills transmissions..the soft shift..it is done with slippage of the clutch packs and bands..

I went full Thor's Hammer with the A-727 and I am really wanting to know how it does..Soon enough..

I have a pickup with a Ford 460 and the C-6 and did the same hammer and what is nice is the fluid is like it is new..pink red..That is because of the solid no slippage shifting..

#13

Chevy - GMC Chassis / Re: 1984 CHIEFTAIN P-30, REAR ...

Last post by Eyez Open - April 21, 2024, 09:40 PM

There really is no tourqe method.

I'll try to make this simple,spin the tire and lock down the nut, quite tight some say 70ftlbs.. Then loosen the nut to almost fingertight just a smidge more than finger tight.

Then rotate the tire a very firmly give it a kick, look closely feel closely for any wobble/oscillation.


The big picture here is your pressing the hub/bearings into the race for a nice tight fit. Don't forget your Carter key...lol

#14

Chevy - GMC Chassis / Re: TH 475 Takedown & Inspecti...

Last post by Eyez Open - April 21, 2024, 09:11 PM

I'm all over that mod as soon as I get things in order. Right now I'm just tinkering around with small stuff. Getting ready for the big first drive moment..This I can tell you disciplined thought is first and foremost, getting out of control can get really easy such as curtains. They really are costly.

Actually it's a tough deal, this 475 I have shifts like a sledge hammer now I really like that needless to say

#15

Chevy - GMC Chassis / Re: BRAKE PROBLEMS

Last post by Eyez Open - April 21, 2024, 08:58 PM

New cylinder that makes it much easier...ok how did you bleed the master cylinder would be the first question. Asking for a friend of course.

https://youtu.be/DsH807ht1tA?feature=shared

#16

Chevy - GMC Chassis / Re: BRAKE PROBLEMS

Last post by RockwoodMike - April 21, 2024, 08:22 PM

Fluid would not flow thru the bleeder. 

If this valve is shifted to the rear brakes or the front, this is exactly what you will get...No flow from the bleeder..because this valve blocks the flow..

Get a DVOM (Digital Volt Ohm Meter) and see if this electrical contact is grounded or open (red arrow)..If it is grounded, then the valve has shifted..This is the ground for the light on the dash..

The problem with these valves is they are full of rusted mud brake fluid..causing them to jam up and not return to the neutral position..

#17

Chevy - GMC Chassis / Re: TH 475 Takedown & Inspecti...

Last post by Potatochip P30 - April 21, 2024, 08:22 PM

Hey there - how is your project going??
Something to throw out there and in the grand scheme of things is not a huge job - look into doing the 4L80 trans swap. That overdrive and lockup converter is a "come to jesus" moment once you get on the highway.... 2450 @ 70 mph
Your frame probably has the holes drilled already for the crossmember, just have to shorten the driveshaft a couple inches, use a stand alone controller and a $99 LS swap trans mount.

#18

Chevy - GMC Chassis / 1984 CHIEFTAIN P-30, REAR WHEE...

Last post by johnfrederick - April 21, 2024, 06:04 PM

After bleeding rear brakes on my 23RG Chieftain, I am putting things back together. I have not been able to find a clear specification for torque on drum/spindle nut.

This inquiry is further complicated by the fact that you'll likely have to tighten or loosen the nut to align the key after torquing. Seems to me this will either increase or reduce the specified torque. Best I can figure is whatever you have to do is close enough?

Any thoughts appreciated.

Thanks, John

#19

Chevy - GMC Chassis / Re: BRAKE PROBLEMS

Last post by johnfrederick - April 21, 2024, 05:44 PM

Eyes, thanks for responding. Master cylinder is new so for now I'm thinking that is not the problem.

The master cylinder was completely full when bleeding began on the front disc brakes. Fluid would not flow thru the bleeder.  Fluid or air back fed thru the master cylinder when the pedal was pressed. This back feeding splashed fluid out of the reservoir.... I'm not sure whether air or fluid was back fed. 

The engine was started off and on during this process to position front tires. I am thinking that may be part of the problem as the valves you mentioned did their thing.

What think you ?

Thanks, again!

Johnm

#20

Chevy - GMC Chassis / Re: BRAKE PROBLEMS

Last post by Eyez Open - April 21, 2024, 04:34 PM

GM brakes are extremely simple. Loosen the brake line attached to the master cylinder, pressurize the brake. If no fluid leaks/sprays out you have a bad master.

Gotta ask..was that brake fluid squirting out of the master or airbubles?

If fluid does flow next stop the brake line..drum/caliper...etc etc.

Master cylinder

Brake line

Portional valving........nasty little thing. Should be laying on top of cross member oil pan right above it. Could also be like a Easter egg hunt trying to find it.

Brake line

Caliper.

The above are all potential speed bumps, check one at a time starting with the master cylinder.

https://www.carparts.com/blog/brake-proportioning-valve-problems/amp/