Transmission or Engine ?

[mrdoiron]

It did drive fine after initial seals were put it... but they cracked it open again when they put the new prop shaft in, so a little hard to totally isolate DOE syle ...

Is there a chance the prop shaft in wrong can be a contributor ? Tomorrow I'll see if I can adjust the throttle, and check heat oof drums after a ride...

thanks for the continued triage help...

mike

[mrdoiron]

I would block the front wheels and jack up one rear wheel. With the transfer case in neutral what happens when you try to rotate the one wheel off the ground by hand?? It should turn freely.

the left rear will rotate forward , but with resistance, and the rear far more resistance...

[mrdoiron]

the left rear will rotate forward , but with resistance, and the rear far more resistance...

I proceeded to remove the drum (new last year as well as shoes), I think the shoe may have been pressing on the drum a bit - not not sure how firm against it that it should be in normal state... so with the drum off I pumped the brake pedal, and the brake wheel cylinder will not go back enough now to get the drum back on - shouldn't this move freely in/out ? Any idea how to quickly have it release ?

I am heading back out to tinker - should likely pull out a manual however...

Here is a pic of the brake cylinder extended also

[artpeck]

If I am understanding your issue you over extended the piston in the brake cylinder. Assuming you didn't damage the seal you should be able to push it back in by loosening the bleed nipple and taking pressure out of the circuit. You will then have to bleed the brakes most likely. When you loosen it make sure you put some clear plastic tubing on it and have the other end in a cup with clean brake fluid. Am sure you know this but if not it will percent air from being sucked into the lines if there is any negative pressure. Also DON'T take the bleed nipple put. A quarter turn or so should relieve the pressure.
Hope that helps. Sorry if it was a tangent.

[Sputnicker]

Try opening the bleeder valve to see if that relieves hydraulic pressure and allows the shoes to return. Sometimes when the flexible hoses fail, they act like check valves and don't allow fluid to flow back to the master cylinder. I've also seen master cylinder failures and brake cylinder failures where the pistons get stuck in the bores - usually due to swollen seals. If the vehicle has been sitting a while, it could also be corrosion in the cylinder(s). If it's in the master, you will likely have pressure in all 4 wheel cylinders (until you open a bleeder and relieve the pressure). If it's the rear hose, you will likely have pressure in both rears. Also, make sure the adjuster is backed off.

[Sputnicker]

I took another look at the picture and don't see the upper return spring on the shoes.

[artpeck]

On your brakes sticking I also had to deal with this. Mine is an S3 but assuming the procedure is similar and surely the principle is. The green book details a specific procedure for adjusting the rear brake shoe clearance using the cam lobe adjuster and having another person pressing the brake pedal. At first I ignored this as I didn't have another warm body handy. After retracing the rear brake procedure I realized why it was different than the front which I am sure is obvious to everyone else but took me a moment to understand. You always want the rear brakes to engage before the front to avoid the rear end of the truck becoming a pendulum. Hence setting the rear brake shoe clearance tighter than the front. Worth paying attention to so the specifics of the procedure outlined in the GB are important. Apologize again if i have stated the obvious

[mrdoiron]

On your brakes sticking I also had to deal with this. Mine is an S3 but assuming the procedure is similar and surely the principle is. The green book details a specific procedure for adjusting the rear brake shoe clearance using the cam lobe adjuster and having another person pressing the brake pedal. At first I ignored this as I didn't have another warm body handy. After retracing the rear brake procedure I realized why it was different than the front which I am sure is obvious to everyone else but took me a moment to understand. You always want the rear brakes to engage before the front to avoid the rear end of the truck becoming a pendulum. Hence setting the rear brake shoe clearance tighter than the front. Worth paying attention to so the specifics of the procedure outlined in the GB are important. Apologize again if i have stated the obvious

I loosened the bleeder to see if that would relieve pressure for the cylinder and allow the shoe to close enough to get the drum back on - no luck, the cylinder seems frozen... not sure of what else to do.

Also not sure this has anything to to with the power issue really - potentially created a new issue who knows.

mike

[mrdoiron]

I took another look at the picture and don't see the upper return spring on the shoes.

there is a spring on the bottom, but none on the top shown in the picture... looks like it wasn't put back when I had the shoes put on. Still not sure how to relieve the cylinder to get the drum back on....

[mrdoiron]

there is a spring on the bottom, but none on the top shown in the picture... looks like it wasn't put back when I had the shoes put on. Still not sure how to relieve the cylinder to get the drum back on....

So the right side of the cylinder will not go back in , left side seems to move in out ok... (pic).
I then took the shoe off and popped the drum and wheel back on to see if the power issue was related to this, and it is not. Same lack of power. So much so, I can't even get enough rev/power to reverse out on a steep incline without getting a good run up first... so still stumped.

The brake cylinder issue could be caused by to having jump on the brake the other day when a car back out in front of me in a lot - so seems an unfortunate coincidence...and a new problem to solve. Suppose this needs a new cylinder as I can't figure out what is happening here...

mike

[mongoswede]

The things that come to mind:

Burned points if you are still running points

Bad tank of fuel



Did the shop have to set the preload on anything in the transmission? If so it might be set
too tight.

Tire pressure low

Transmisssion oil level low

[jac04]

Transmisssion oil level low

I was reading this thead and wondering if they forgot to re-fill the transmission or x-fer case.

Mike - Have you checked the oil levels?

[mrdoiron]

The things that come to mind:

Burned points if you are still running points

Bad tank of fuel



Did the shop have to set the preload on anything in the transmission? If so it might be set
too tight.

Tire pressure low

Transmisssion oil level low

Thanks - appreciate the help...

I'll drop off the truck Mon-Tues at the Trans shop I used...hate to bring it there, but since they know what they did, likely best to bring it there for now... and can answer question on preload, check trans fluid level etc.

Tire pressure is fine, and fuel is not old as was recently filled.

Points will need to be checked - would there be something more obvious to look for if caused by points ?

m

[mrdoiron]

I was reading this thead and wondering if they forgot to re-fill the transmission or x-fer case.

Mike - Have you checked the oil levels?

I hadn't actually as that was one of the things I asked them to verify - but suppose at this point anything is possible - since I need to remove plugs etc, I'll likely just wait til I drop it off... thanks Jeff.

[jimrr]

you have to peg the gas pedal then go to the carb. and see if it is all the way ''floored'' at the carburator.
I think everything got covered here, if you were dragging a brake you should smell it, and if it was a front brake it'd pull you left or right.
e brake, gas pedal throw, and points in that order, i think you'll figure it out tho one post here mentions preload on the lay or carrier shaft in which instance you will get a hot case on that end after about ..........25 miles? ...... well, someone mabey 'swapped' gas with you?,,, or stuffed a rag in your air cleaner?? what's left?