locker noise

[REDWOLF]

This is probably a stupid question, but how much noise should the locker in my M1009 make when I am in mud or with poor traction?

 

[Cucvnut]

You have a gov lock not a locker in your rear axle.

 

[REDWOLF]

Ok what is a gov locker and is that why it is noisy when you are on pore traction.

 

[rickf]

I hate to tell you this but you should not hear a gov-loc at all! What are you hearing? What kind of sound? Those Gov-loc's tended to hand grenade if you spun one wheel to fast before they had a chance to engage. I have seen a lot of them come right through the diff cover.

Rick

 

[REDWOLF]

I drive this truck ever day with no problems. The sound i here when using my short cut across the field when it is very wet is a clanking sound when one or the other wheel loses traction. I just had the truck jacked up the other day to swap to my big tires, one wheel at a time and there is not a lot of play between the rear wheels. Still not shure what/how a gov lock works.

 

[Keith_J]

The 1009s have a limited slip differential which uses standard spider/side gear type of differential, the limited slip is handled with clutches.

The Detroit Locker on the 1 tons is a sprag clutch system which eschews with the side and spider gears to differentiate axle velocities. It can make noise when differentiating.

If the Gov Lok is making noise, you have problems.

 

[flighht2k5]

The 1009s have a limited slip differential which uses standard spider/side gear type of differential, the limited slip is handled with clutches.

The Detroit Locker on the 1 tons is a sprag clutch system which eschews with the side and spider gears to differentiate axle velocities. It can make noise when differentiating.

If the Gov Lok is making noise, you have problems.

No offense but you have no idea what you are talking about.
The 1009 is not a LSD. It is a gov bomb.

A Detroit locker is locked until you turn. Then it unlocks.

 

[REDWOLF]

Now now boys trying to figure out what is going on here with my rear before it goes south. Lol, now thats funny. Hopfuly nothing is going on, been out of work for over a year just started a new job about 6 mounths ago. Still playing catchup on bills no money for truck.

 

[rickf]

OK, Let's figure out what you have in there first. Did you buy this truck from G/L or private? If it is jacked up both rear wheels in the air and in neutral, turn one wheel fairly quickly which way does the other one go? If you hold one wheel and turn the other does the driveshaft turn or is it trying to turn the other tire? If it seems that both tires are tied together then you have either a limited slip or a locker. If they go opposite directions then it is an open differential or a gov-loc. It will be a gov-loc if it has not been changed in that scenario. Now, IF both wheels turn together here is what you do. take one tire and roll it backwards just until you feel the slightest resistance and hold it there. Have someone else turn the other tire forward and IF it is a locker the tire will turn and you will here ratcheting noise from the rear. That would be the ONLY noise you should ever hear from any differential and most of the time you will not be able to hear it anyway. The sound you describe COULD come from a gov-loc that is very low on oil, has no oil, or is about to come apart.

Rick

 

[Keith_J]

No offense but you have no idea what you are talking about.
The 1009 is not a LSD. It is a gov bomb.

A Detroit locker is locked until you turn. Then it unlocks.

Go take a look at Figure 113 in the -34P and tell us what you see. The governor is an axle velocity governor. Specifically look at items 6, 8, 14 and 15. Those are the CLUTCH PACKS.

 

[rickf]

I would suggest you pull the diff cover and see what is there. Dirty oil is a given but any metal filings or chunks means you caught it before it let you down on the highway. 10 bolt rears are a dime a dozen so if it is bad you should be able to find another for 100.00 or less. Look for one with an open rear and then put in a Lock-Rite locker. You could run the open rear until you get the funds for the locker.

Rick

 

[flighht2k5]

Go take a look at Figure 113 in the -34P and tell us what you see. The governor is an axle velocity governor. Specifically look at items 6, 8, 14 and 15. Those are the CLUTCH PACKS.

It's loosely classified as a locker. Not a LSD.

 

[REDWOLF]

It is the stock rear never been changed will try to get it jacked up this coming week and see what i can figure out. I do have a gm 3/4 ton full floater rear waiting to go in, no locker and not the same gear as the front axel. Was waiting untill i could get a 1 ton dana 60 front axel and matching gear sets with a true rear locker and swap both in at the same time.

 

[Keith_J]

It's loosely classified as a locker. Not a LSD.

Where are the LOCKING surfaces? Compare and contrast Figures 111 (Detroit Locker) to Figure 113 (Gov-Lok). Specifically, on Figure 111, items 24 and 25 are the locking elements with dogs that positively engage.

On Figure 113, the multiple plates and washers are friction surfaces, much like a wet clutch on a motorcycle.

I know what I am talking about.

 

[rickf]

Fact of the matter is this, they act like an open rear until one wheel spins up and then the governor applies pressure to engage the teeth on the side clutch plates. The big problem is when someone stomps the pedal and one tire immediately spins up to 40 or 50 mph and then the governor kicks in the clutches. If you are on soft dire, gravel of mud you may get away with it but most of the time it is someone pulling off of the shoulder of the road onto the road surface. Now the right tire is going 50 mph and the left is going 5 mph and it is now on asphalt. Clutches kick in and BANG! It sends shrapnel right through the rear cover. It is no more of a locker than Chryslers Power-Loc. The Lock part is just in the name, there is no mechanical locking there.

 

[Keith_J]

Yes, rickf, the clamping force on the clutch packs IS non-linear. The side-spider interaction acts to boost the velocity of the spinning side, due to non-linear application of clutch clamping force, things can come apart.

 

[REDWOLF]

What fluid do you use in these gov lock rears? Regular gear oil? Is there a way to check the oil level ?

 

[DriverSideImpact1008]

I have heard the gov-locks make a prety loud clunk when it engages. Not a lot of clanking and stuff like that. Look on youtube, a lot of people put videos of noises on there. That might help you figure out whether it's a normal clunk or time for a new axle.

 

[cpf240]

What fluid do you use in these gov lock rears? Regular gear oil? Is there a way to check the oil level ?

Per the Lube Order, the M1009 just uses gear oil, no additives.

 

[tankie88]

My Gov loc lost a lot of teeth.Someone posted on the site that they are trash anyway.I put a normal same ratio diff back in mine.