BW-1356 oil ?

[roundhouse]

A friend of mine inherited his grandfathers 88 F150. It’s been sitting for 12-15 years .
I got it running with a new fuel pump
, filter and regulator .

New master cylinder booster calipers and hoses.

Working on Changing all The fluids

The t case drain plug will not come out
Stripped out the socket plug and then I tried using a chisel to turn it and it ain’t moving

I pumped out the oil and it’s clearly not ATF which the internet tells me the 1356 should have
It looks like a thinner version of the oil that’s in the axles . It looks like regular motor oil .

Where to go from here ?

Drill out the drain plug ?

Replace the oil with rear oil ?

Replace it with ATF ?

 

[TrikeKid]

Might be some kind of manual transmission fluid like syncromesh. Some people like to make shit harder than it is and dump the "wrong" fluid in transmissions/transfer cases because they think it's somehow better. I've never put anything but ATF in them and that's all I've ever known to be spec'd for them. If you have a way to stuff a hose in and extract the fluid that is there I'd fill it back up with ATF and forget about it.

 

[Clb]

Ever seen 300 gagillion mile atf?

 

[roundhouse]

Was concerned there might be some issue with combining ATF with whatever residual oil was still left inside .

It’s a nice truck
Has one small bit of rust in the floor.
The 302 has a skip, and I found one cylinder with low compression ,
7 were 125 psi or higher but the drivers side rear was 65 psi , which didn’t improve when I squirted some oil in the cylinder ,

I assume that’s low enough to keep it from firing ?

And the compression not improving with oil means a burnt valve ?

 

[roundhouse]

Ever seen 300 gagillion mile atf?

Yep, what’s in the trans doesn’t look terrific but I haven’t changed it yet , since changing the fluid on an old auto trans usually kills the trans .

 

[u2slow]

Oil viscosity has to be friendly for the internal pump. ATF is usually spec'ed for cross-contamination reasons.

ATF, engine oil, syncromesh, etc. should all do the trick.

 

[TTMotorsports]

On my manual ford trans that spec ATF, I always ran Mobil 1 5w30 Full Synthetic motor oil. I ran them in the desert and never had a problem with them. Also ran that in the BW1356 as well without issue.

 

[TrikeKid]

Was concerned there might be some issue with combining ATF with whatever residual oil was still left inside .

It’s a nice truck
Has one small bit of rust in the floor.
The 302 has a skip, and I found one cylinder with low compression ,
7 were 125 psi or higher but the drivers side rear was 65 psi , which didn’t improve when I squirted some oil in the cylinder ,

I assume that’s low enough to keep it from firing ?

And the compression not improving with oil means a burnt valve ?

ATF is still oil, it'll be fine long as the viscosity is low enough for the pump to work. General rule of thumb on a gas engine is 90-100psi minimum to run so yeah, 65 ain't gonna do it. Could be burnt valve and that's why it's been parked or it could be a sticky valve from being parked so long.

 

[roundhouse]

The pcv on them is routed to the intake runner for the #8 cylinder. Burnt valves/pistons and fucked rings are pretty common on that hole when the motor gets some mileage on it.

Are you getting a bunch of blow by?

And whatever you do, after you fix the compression issue, throw a catch can on there to help prevent the problem in the future. I know there’s a bulletin out there about moving the pcv fitting on the intake, but it’s best if you prevent it from burning any oil if possible.

Found that from broncolinks

I miss that miesk5 mother fucker from fsb/broncolinks. He was like a robot, always pulling up the most obscure documents and shit from Ford whenever you had a question.

The 5.0 in my bronco from a 1990 mustang also has a low cylinder and I’m pretty sure it’s the last cylinder on the drivers side .

Thought it might be a stuck Valve

I can pull the cover and see
Probabaly a burnt valve though since that requires removing the head to fix