Rear locker engagement

[Paycheck]

How do I engage the rear locker on the M1009
Searched threads but can't find any info thanks


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[Jeeperjoe]

It's locked full time so long as it is the stock Locker

 

[Paycheck]

Yes original locker thank you for the information


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[patracy]

It's locked full time so long as it is the stock Locker

Not on a M1009. The M1009 uses a gov-locker. Which is a diff that has a limited slip pack in it, then once up to speed can lock the diff with a flyweight. They aren't the strongest locker/traction unit, as they're commonly referred to as a gov-bomb.

 

[Jeeperjoe]

Not on a M1009. The M1009 uses a gov-locker. Which is a diff that has a limited slip pack in it, then once up to speed can lock the diff with a flyweight. They aren't the strongest locker/traction unit, as they're commonly referred to as a gov-bomb.

Thanks for the information, so it is not a selectable locker but it is not full time locked then?

 

[patracy]

There's not really a way to select it. (Unless you intentionally increase wheelspeed to cause it to lock, but doing so brings the risk of failure from shock loading) Normal operation, it's just a open diff with a limited slip pack in it. (AKA Posi-track)

 

[Paycheck]

So it engages during wheel spin not a true locker? Does transmission need to be in 4L to engage or does it work in 4H and 2wd
Thanks


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[patracy]

It has a flyweight on it, so it will work in 2wd, 4wd, 4L.

This is a newer unit, so it's a little different between what's in the 1009. But the function is the same.

https://www.youtube.com/watch?v=MCxqUJCZGNU

 

[cucvrus]

IMHO the M1009 rear axle will hold up pretty decent. That is in stock form and driving it smarter not harder. If you put bigger tires on it and spin them every time you can you will have trouble. I have used the same rear in several on my M1009's as plow tucks and had few failures. I have the stock rear and tire size on my off road M1009 Terminus and I tend to be hard on it. I am well aware of the weak link and the breaking point so I tend to use low range and spin at a minimum. Time will tell but thus far I have had great success with the 10 bolt M1009 stock Gov-lok rear. I use them hard and service and maintain them harder. Don't let people talk you into them being trash. They have been in just about every new 1/2 ton Chevy 4 X 4 I bought up to the 2015 and they have been great. Face it you can break an anvil if you hit it hard enough. Nothing is infallible. Good Luck. Change the fluid and check the magnet. I still have few new ones in the crate,. Hopefully that day never comes. But maybe.

 

[patracy]

I'd like to interject a bit. I've blown a gov-bomb with a clapped out 6.2. Stock tires. Just happened to be in the wrong place/wrong time. Was pulling back onto concrete from mud turning uphill. Truck started fishtailing on me before I knew it and the outside tire caught concrete at the same time it decided to lock. Boom.

I know of other members here that have stock trucks that have blown them. Even last year at the Ga Rally, not even off road. Phil ended up driving his in 4wd back home to FL.

It's hard to argue that they're underrated in construction just due to the physical size of the parts. It's a novel design giving the best of both world. But certainly could be improved.

Ditto on the magnet! I've blown one in a 14 bolt as well. Probably wouldn't have toasted the R&P if all the "kibbles and bits" from the diff had been caught by a magnet.

 

[Paycheck]

Do you know of a maintenance procedure to extend the life of the unit


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[doghead]

Let me start with, I have broken an anvil. (seriously)

I have had dozens of gov bomb difs which I've put over 200000 miles on several of them in trucks I bought new.

While I'd like to give the impression I've maintained them well and not abused them, the fact is I have used my trucks as trucks and have been pretty tough on them at times(clench your butt moments).

The only complete failure I've had on them was not even with the diff. I have broken a couple of pinion shafts, and a few axle shafts. Both times the trucks were making much more power than stock. Also have grenaded a few professionally built 400 transmissions. And of course have blown a few transfer cases. Some times with stock sized tires and some with tires that were up to 36".

I'm not scared of those axles at all. There are much better(stronger) units out there for sure though.

 

[patracy]

Do you know of a maintenance procedure to extend the life of the unit


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Change the oil routinely. Don't get into situations we mentioned about high wheel speed/sudden traction. Stay stock in tire size.

Outside of that, it is what it is. The last two I mentioned are the biggest causes.

 

[Paycheck]

Peeve owner installed 35's


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[glaser06]

Let me start with, I have broken an anvil. (seriously).... Also have grenaded a few professionally built 400 transmissions. ....

That right there (assuming proper setup and maintenance) says you're seriously special.

I was in a truck that the gov-bomb went off in. An '83 short bed chevy with a 400 motor, blew as we transitioned from a pasture to highway. Scary as ****.

 

[The FLU farm]

As I recall, the housing, right side shaft, diff cover, and a few other things took offense when the bomb went off. No wheel speed to speak of, mud tires in mud. Guess it had an unusually short fuse.
And I must admit that I never fully understood the idea behind a limited slip that doesn't do anything until the wheel speed is high enough to engage the clutch pack - at which point it puts big shock loads through the system. Kinda like revving the engine and dumping the clutch in an effort to get more traction.

 

[Paycheck]

Any recommendations for a better option for a rear locker with what I'm reading I'm concerned about damaging in my rear end


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[rustystud]

This was one of the most common units rebuilt out there (due to failure) . I cannot remember how many I did myself. This unit can last a long time if treated right though. That means no reving around corners and other things that will "shock" the differential. Eaton had one for years on large trucks but it too had a bad history and was replaced with a "air-shift" unit. For me personally I would just rather have an "open" differential instead of the "gov-bomb" . At least I could "depend" on it to get me home.

 

[cucvrus]

Weirdly enough I had a guy try and tell me that they were called Gov Locks because only the Government could buy them and he said if I still had it in my M1009 it was illegal for state inspection. WOW. I had people tell me the same thing about police cars I bought over the years. They said the state removes the cams and detunes the engine. The rumors are wild and never ending. Did you know that you could put and intake,distributer and carburetor on a 6.2 diesel engine and convert it to gasoline and it has over 500HP? I didn't either but a guy at a truck stop told me all this stuff. I just smile and waved as he left. Also I had guys look at my engine in my M1009 and tell his friend when he was in the Army he changed the spark plugs in these trucks and the spark plug wires were in the metal tubes and he had to pull new wires thru each tube and get the threads restarted. WOW. I was glad he was driving a Subaru. I exercised my right to remain silent each time. I did not want to ruin the fantasy. Have a great day.

 

[Csm Davis]

Weirdly enough I had a guy try and tell me that they were called Gov Locks because only the Government could buy them and he said if I still had it in my M1009 it was illegal for state inspection. WOW. I had people tell me the same thing about police cars I bought over the years. They said the state removes the cams and detunes the engine. The rumors are wild and never ending.

You have no idea how bad that actually affects the hobby, there is a judge in Memphis that has said in court that civilians are not allowed to own any military surplus and has made a ruling based on that.

Did you know that you could put and intake,distributer and carburetor on a 6.2 diesel engine and convert it to gasoline and it has over 500HP? I didn't either but a guy at a truck stop told me all this stuff. I just smile and waved as he left.

He was almost right that was the 5.7L GM conversion diesel made with a Olds race block pretty sure you also had to change heads and pistons.

Also I had guys look at my engine in my M1009 and tell his friend when he was in the Army he changed the spark plugs in these trucks and the spark plug wires were in the metal tubes and he had to pull new wires thru each tube and get the threads restarted. WOW. I was glad he was driving a Subaru. I exercised my right to remain silent each time. I did not want to ruin the fantasy. Have a great day.

He was also just slightly confused some of the older gas burner jeeps had a metal tube if you can believe it on the sparkplug wires. Mind you not like the ridgid fuel lines on a diesel.
My point in this is to politely tell people that they are mistaken that it was a different model or that someone misinformed them about a hobby that many of us enjoy every day and invite them to come to a rally and see lots of beautiful green history on wheels.

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