Posi carrier
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Senior User
Joined: Feb 2004
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From: Guayaquil
Posi carrier
Hi everyone,
I purchased a Ford Racing ring and pinion (Part: M-4209-K410M) for my 10.25 Sterling a long time ago.
I have also purchased a used factory (I assume) Posi unit (I know it's a chevy term, but I don't know the ford term to describe it sorry).
Anyway, the carrier has good clutches and is in great shape. However, the only ID number stamped on it is:73109 x07 31 87 and I don't know what it represents.
Question is: I am trying to seat the ring gear flush on the carrier but it doesn't sit all the way down to the carrier's surface! There are still 10mm before it reaches the carrier's surface. The ring bolt wholes and carrier's bolt holes (12 of them) all coincide but I am afraid the diameter is not correct or what? (as far as I know they SHOULD be compatible)
PLease enlighten me!
Abel
PS. The pictures show the Unit, the bolt pattern and diameter, the ring on the carrier, the space between carrier and ring.
I purchased a Ford Racing ring and pinion (Part: M-4209-K410M) for my 10.25 Sterling a long time ago.
I have also purchased a used factory (I assume) Posi unit (I know it's a chevy term, but I don't know the ford term to describe it sorry).
Anyway, the carrier has good clutches and is in great shape. However, the only ID number stamped on it is:73109 x07 31 87 and I don't know what it represents.
Question is: I am trying to seat the ring gear flush on the carrier but it doesn't sit all the way down to the carrier's surface! There are still 10mm before it reaches the carrier's surface. The ring bolt wholes and carrier's bolt holes (12 of them) all coincide but I am afraid the diameter is not correct or what? (as far as I know they SHOULD be compatible)
PLease enlighten me!
Abel
PS. The pictures show the Unit, the bolt pattern and diameter, the ring on the carrier, the space between carrier and ring.
Lead Driver
Joined: Aug 2006
Posts: 5,670
Likes: 13
From: Sand Lake, MI
It should be a snug fit but at the same time not take lots of pressure/force with the bolts to do it.
Helps to put the ring gear in the oven at 200 hundred deg for a half hour or so, then quickly drop it into place on the carrier while its in a slightly expanded condition. Can put the carrier in a deep freeze while the gear is in the oven to contract it slightly at the same time.
Be sure you have the correct gear first though.
Helps to put the ring gear in the oven at 200 hundred deg for a half hour or so, then quickly drop it into place on the carrier while its in a slightly expanded condition. Can put the carrier in a deep freeze while the gear is in the oven to contract it slightly at the same time.
Be sure you have the correct gear first though.
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Senior User
Joined: Feb 2004
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From: Guayaquil
Hah hah... Man I've had such a laugh... My brother has NO CLUE of this stuff but he was just telling me to do what you have told me. I was making fun of him as your message arrived... It is good to hear it from someone here though! I appreciate it.
By the way, I've just measured the circumference of the carrier at the point where the ring gear is supposed to seat and it measures 520mm which equals a diameter of 165.6mm. I also measured the inner diameter of the ring gear and it is: 165.3 mm or so.
Is this about right? In your opinion?
Thank u again!
Abel
By the way, I've just measured the circumference of the carrier at the point where the ring gear is supposed to seat and it measures 520mm which equals a diameter of 165.6mm. I also measured the inner diameter of the ring gear and it is: 165.3 mm or so.
Is this about right? In your opinion?
Thank u again!
Abel
Lead Driver
Joined: Aug 2006
Posts: 5,670
Likes: 13
From: Sand Lake, MI
I've just measured the circumference of the carrier at the point where the ring gear is supposed to seat and it measures 520mm which equals a diameter of 165.6mm. I also measured the inner diameter of the ring gear and it is: 165.3 mm or so.
Is this about right? In your opinion?
Yes sounds about right, its going to be an "interference" type of fit for sure, not so much as to need a press to do it but yea a good snug/tight fit. Wouldn't want it relying solely on the bolts to hold true center.
Heating the gear and cooling the carrier will help but you gotta work kinda fast, the two parts will quickly work to equal each other "temp wise" at the moment contact is made between them.
Have everything ready including a drift pin to ensure the bolts line up right, your not going to turn it if they are off a little.
Props for your brother!!! LOL!
Is this about right? In your opinion?
Yes sounds about right, its going to be an "interference" type of fit for sure, not so much as to need a press to do it but yea a good snug/tight fit. Wouldn't want it relying solely on the bolts to hold true center.
Heating the gear and cooling the carrier will help but you gotta work kinda fast, the two parts will quickly work to equal each other "temp wise" at the moment contact is made between them.
Have everything ready including a drift pin to ensure the bolts line up right, your not going to turn it if they are off a little.
Props for your brother!!! LOL!
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Senior User
Joined: Feb 2004
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From: Guayaquil
One more question.
-What is the order or set-up for the clutches in the carrier?
They appear to have been put randomly, some have the rugged side facing up others facing down.
I do see that the first clutch, which rugged side is facing the following clutch disc, appears to be cracked (Will this be a big of a deal?)
However, the first clutch disc on the other side, under the opposite spider has its rugged side facing towards the spider.
As you can see... They all look as if they have just been thrown in there randomly. Maybe I'm wrong. What do you think?
I also posted this question under a different topic name, but you seem to know quite a lot and have been very helpful, so I wanted to give it a try first.
Abel
-What is the order or set-up for the clutches in the carrier?
They appear to have been put randomly, some have the rugged side facing up others facing down.
I do see that the first clutch, which rugged side is facing the following clutch disc, appears to be cracked (Will this be a big of a deal?)
However, the first clutch disc on the other side, under the opposite spider has its rugged side facing towards the spider.
As you can see... They all look as if they have just been thrown in there randomly. Maybe I'm wrong. What do you think?
I also posted this question under a different topic name, but you seem to know quite a lot and have been very helpful, so I wanted to give it a try first.
Abel
Postmaster
Joined: Jun 2007
Posts: 3,856
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From: Lebanon
hope you get the problem figured out, my friend. sorry, i dont know much about them. all i know about mine, so far, is that it is a 3:55 gearing. i would like to install a Detroit Locker in the future, if possible. i have only owned one, but man, was it awesome! where are you located? i have a feeling that is not a small town in Arkansas! ha ha
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yeah don't use a cracked clutch in your carrier it will come apart there is an order to how you stack the clutches but i don't remember what it is, i had my trac lock rebuilt by a local guy and he stacked the clutches as tight as he could it's basically like a spool now
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Thread Starter
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Senior User
Joined: Feb 2004
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From: Guayaquil
Thanks,
Yes it's too bad one of them is cracked since the rest appear to be in great condition and not worn at all. I'll have to try and get only one.
I'm in Ecuador mate... not too easy to find someone knowledegeable of these things.
My 70 Boss Mustang has got a Detroit Locker... I totally know what you mean by awesome
Cheers!
Abel
Yes it's too bad one of them is cracked since the rest appear to be in great condition and not worn at all. I'll have to try and get only one.
I'm in Ecuador mate... not too easy to find someone knowledegeable of these things.
My 70 Boss Mustang has got a Detroit Locker... I totally know what you mean by awesome
Cheers!
Abel
Lead Driver
Joined: Aug 2006
Posts: 5,670
Likes: 13
From: Sand Lake, MI
Yea what the others said but would add a comment, you say the lining on one faces and rides right on the spider gear?
I wouldn't think it be good to have the lining of any of the friction disks riding against the back side of the spider gears or against the carrier housing itself. Should be on a steal plate in between there on each end as to protect those surfaces from wear?
I wouldn't think it be good to have the lining of any of the friction disks riding against the back side of the spider gears or against the carrier housing itself. Should be on a steal plate in between there on each end as to protect those surfaces from wear?
Thread Starter
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Senior User
Joined: Feb 2004
Posts: 236
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From: Guayaquil
Yea what the others said but would add a comment, you say the lining on one faces and rides right on the spider gear?
I wouldn't think it be good to have the lining of any of the friction disks riding against the back side of the spider gears or against the carrier housing itself. Should be on a steal plate in between there on each end as to protect those surfaces from wear?
I wouldn't think it be good to have the lining of any of the friction disks riding against the back side of the spider gears or against the carrier housing itself. Should be on a steal plate in between there on each end as to protect those surfaces from wear?
I'll have all that taken apart and see what's there to have replaced!
Thanks for the heads up!
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