Pulled the trigger, Mutt is home!

[elkhtr]

Full fluids and maintenance are definitly on the list.
Pulled the plug on the rear diff, very slowly about a cup and a half of something resembling melted caramel came out.
No material to speak of on the magnets.
Flushed it out with diesel, recharged with gear oil and what do you know, much quieter now.
U joints are all tight, but I will be diving into them soon anyway.

 

[srodocker]

It was in parkland...holy moly...

 

[Jeepsinker]

If ujoints have no slack and don't bind, just grease them and run them. New joints are not as good as the old stuff, unless maybe you buy moog.

 

[Whiterabbit]

Folks run these things through high water and forget those vents will let water into the diffs and transmission. Your right, always do a total fluid change on new to you trucks. I drained some funky stuff out of mine! The trans needs 90wt but make sure it's not GL-5! You need GL-4 or GL-3 so it doesn't eat your syncros.

 

[elkhtr]

Folks run these things through high water and forget those vents will let water into the diffs and transmission. Your right, always do a total fluid change on new to you trucks. I drained some funky stuff out of mine! The trans needs 90wt but make sure it's not GL-5! You need GL-4 or GL-3 so it doesn't eat your syncros.

Thanks for the heads up!
I dont believe I have ever heard that designation.
Time to do some research.

 

[Whiterabbit]

I find that gear oil at Tractor Supply, I think it's Travelers brand and is for Ford tractors. GL-5 rated oil has some additives that are harmful to brass/bronze syncros and bushings so get any oil rated lower than GL-5. I've found Warren brand in the lower GL ratings too. I just buy alot of it and fill my diffs with it too so I don't have to have all different versions of gear oil laying around.

 

[FMJ]

Congrats, looks like a nice rig! Bet it's alot of fun to drive

 

[elkhtr]

Congrats, looks like a nice rig! Bet it's alot of fun to drive

You would have to ask my wife about the driving part.
I just get to work on it.

 

[steelypip]

There is an actual specification for gear oil being safe for yellow metal (brass/bronze synchronizers and bushings). Because it has hurt sales of GL5, more and more GL5 gear oils have been reformulated to remove the acids that preferentially eat yellow metal.

Be sure to check the label on the gear oil before you decide it's not appropriate for your vehicle. For example, the Wal-mart Supertech branded semi-synthetic GL5 is indeed yellow-metal compatible.

This is not a recommendation, as I have never run that particular lube in anything, although I have run other Supertech products with good success and might well try the ST stuff the next time I need to get some generic gear oil for something.

 

[nattieleather]

Yep old dinosaurs guts will get thick and cause some noise. Did anyone tell you about the bolt on the transmission? There is a fill plug and a bolt for the trans that look the same. Pull the wrong one and the trans breaks. I don't have a M151 any more so I don't remember how to tell the difference. Someone will speak up I'm sure.

 

[Flyingvan911]

All of the Mutts in the East Wind fleet have noisy differentials. They have a grinding, whining sound but they are solid. Also check the bushings in the control arms. They can rattle and clank if they are worn. It's usually accompanied by noticeable wandering or shimmying if you play with the steering while driving.

 

[Whiterabbit]

Yep, the trans oil fill plug looks like the big drain plugs on the bottom of the trans/xfer. Don't mess with the bolt higher up on the side of the trans above the fill plug. It'll drop parts inside the trans.
The wife and I love our A2 and she's going to make a 4 hr drive to the Ga. SS rally in it. I'll already be there in my truck!

 

[elkhtr]

Yep old dinosaurs guts will get thick and cause some noise. Did anyone tell you about the bolt on the transmission? There is a fill plug and a bolt for the trans that look the same. Pull the wrong one and the trans breaks. I don't have a M151 any more so I don't remember how to tell the difference. Someone will speak up I'm sure.

Thanks for the warning, I read about that one in another 151 thread.
Good things to know before you start.

 

[Lindsaym151]

OMG nice find!

 

[srodocker]

hey elk! Check out the PNW Thread....doing a lunch on sept 28th!

 

[elkhtr]

hey elk! Check out the PNW Thread....doing a lunch on sept 28th!

I saw that, but that is a bit of a haul from where i'm at.
My mom does live down by hawks prarie, maybe if I can combine a trip.
I'll have to let it get a little closer and see.
Would love to meet some of you guys.