Rear end oil checked

[Rodney Bullock]

How many of you have checked the oil in your rear pumkin. I have not had a problem however we drive these cars hard and that needs to be a concern. What weight oil? Do we use an oil additive?

[Don Coatney]

Rodney;

I check my differential oil everytime I move my car out of the garage. If there is no oil on the floor then the oil level is OK. I also check my engine oil level, radiator level, and master cylinder level the same way. My engine does not use oil. I think I pulled the dipstick only once when I drove to Sulley last summer.

I use GO-90 (smells like fish) in my differential.

[greg g]

Had mine checked before a little trip to Virginia. I have it checked each year during the state mandated saftey inspection. One thig to check is the vent bolt on top of the piffy. It is the one that holds the brake line splitter on. The top if it should wobble freely. It allows heat pressure to escape so as not to push lube past the seal when it up to operaing temp.

SAE 90 is the recommended lubricant.

[oldmopar]

I usually check mine about once a year. and use 85-90 weight GL-4 there is a GL-5 but it is for limited slip rears so not sure if it is correct for our cars. The manual recommends drain and replace every 20,000 miles. I do not drive enough to worry about 20,000 miles. I do replace the rear and trans fluids when I get a vehicle. If yours has never been changed you may want to replace it with some fresh fluid

The manual says to loosen the bottom cover bolts to drain I use a suction pump

[oldmopar]

Looks like it was do for a change. I think the older plymouths like the P15 did not have a drain I think my 52 has a drain plug

[Don Coatney]

Here is my differential oil check after the car sat idle for a month.

Here is my engine fluid check after my car sat idle for a month.

[Rodney Bullock]

I was running my car like a idiot, 115 miles an hour last nite. i heard some strange noises upon my arrival home last nite. This morning I got some lucus 90 weight (3 bottles) and went to Jiffy lube. It took 2 1/2 bottles, I then found out that it was the rear brakes that I was hearing:mad: I am glad that I changed it, it was 45 years old. It was like water. I had a great time this afternoon. I took the car over to the machinist that built my motor. He was very pleased with what I did with the car. I felt pretty good:D I finally got this guy's approval.

[steveplym]

The rear diff in my car has been leaking a bit. I try to check it several times a year. Always leaves a drop or two on the concrete each time it enters and leaves the garage.

[oldmopar]

The rear diff in my car has been leaking a bit. I try to check it several times a year. Always leaves a drop or two on the concrete each time it enters and leaves the garage.

That could be the pinon seal if it is in the center of the car.

Also check the rear vent as greg mentioned .

"greg g One thig to check is the vent bolt on top of the piffy. It is the one that holds the brake line splitter on. The top if it should wobble freely. It allows heat pressure to escape so as not to push lube past the seal when it up to operaing temp."

[Normspeed]

I had a couple old rear end housings that I scrapped after removing everything usable. I love the materials and workmanship in these old cars. I cleaned up the vent assemblies and kept them for a rainy day. Beautiful stuff, no plastic here.

[Rodney Bullock]

I'm I to understand that all rears have this vent? Where would I look for it? This is why questions must be asked:) thanks Normspeed!

PS what happens when it's clogged?

[Plymouthy Adams]

this is two function device..axle vent an the "T" where the rubber brake line connects and steel lines go to each backing plate...

[Don Coatney]

I'm I to understand that all rears have this vent? Where would I look for it? This is why questions must be asked:) thanks Normspeed!

PS what happens when it's clogged?

Rodney;

I do know where the vent on my rear end is located. And I know what to do when it is clogged. I dont always know what to do when it is not clogged but I do know to do it in a hurry. As I age it does sometimes get confused between the three states of matter (solid, liquid, and gas).

However the differential vent on my car is located above where the brake lines connect. May be different on your car but look there first.

[Rodney Bullock]

Don, I think maybe your checking the wrong rear:eek:

[Tim Frank]

I had a great time this afternoon. I took the car over to the machinist that built my motor. He was very pleased with what I did with the car. I felt pretty good:D I finally got this guy's approval.

Rodney,

Not to be a contrarian, but shouldn't he be trying to get your approval?

[Rodney Bullock]

Rodney,

Not to be a contrarian, but shouldn't he be trying to get your approval?

Tim you need to meet this guy. I took Joe Flanagan there and I find myself trying to get "his" approval:eek: