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Re: [GMCnet] Final Drive Intermediate Axle questions [message #322513 is a reply to message #322504] |
Tue, 22 August 2017 21:13 |
Richard Denney
Messages: 920 Registered: April 2010
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Senior Member |
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What strut? I don't have anything like what you are describing even on my
3.07. The axle assembly includes the axle (flange and shaft), bracket (what
I've been calling the hanger), the bolt-on retainer, the bearing sandwiched
between the bracket and the retainer, and the pressed-on slinger. The
bracket bolts to the side of the block with 7/16 screws and large, special
washers. One of them has an addition stud for the horse-collar bracket. I
don't see anything else connecting the bracket in the right with the final
drive on the left.
Rick "pictures?" Denney
On Tue, Aug 22, 2017 at 8:08 PM Ken Henderson
wrote:
> Rick,
>
> I have zero experience with the 3.21. But one idea popped into my mind:
> Do you have the strut that connects the final drive to the stub axle
> hanger? Or is one even used with the 3.21? Seems to me that the presence
> of that strut would help to position the hanger properly, at least against
> lateral movement which might result when you tighten the bolts into the
> engine.
>
> Ken H.
>
>
> On Tue, Aug 22, 2017 at 3:40 PM, Richard Denney
> wrote:
>
>> Sorry, I can't think of any way to present this briefly.
>>
>> After installing the new final drive, and reinstalling all the stuff I
> had
>> had to remove, my last step was installing the intermediate axle, which
>> extends from the final drive through a hanger that bolts to the starboard
>> side of the block, and provides the flange for the starboard half-shaft
> to
>> bolt to. This axle just inserts into the final drive, and the spline
>> engages the spider (or, in the case of this rebuilt 3.21, the planetary
>> gear). The manual says to adjust it around to find the middle of play,
> and
>> then tighten the two bolts that hold that hanger in place good'n'tight
> (50
>> foot-pounds). Those bolts have specially hardened and thick serrated
>> washers to hold the hanger in that position.
>>
>> I anticipated this would be easy, but, of course, it's the easy stuff
> that
>> surprises us.
>>
>> 1. I can't find the middle position--the play accommodated all extremes
> of
>> the holes in the hanger. I looked for a position that provided easiest
>> rotation (not easy to discern) and didn't seem to distort the seal (also
>> not easy to discern).
>>
>> 2. The real problem is that when I tighten those hanger bolts, I get a
> very
>> loud bearing noise in that hanger bearing when I spin the axle by hand.
> I'm
>> expecting some roughness provided by the rattling of the gears in the
> final
>> drive, but this sound was definitely coming from the hanger bearing. That
>> bearing is new, and smooth as butter when not bolted up to anything.
> When I
>> hold the hanger in what seems to be the best position but don't tighten
> it,
>> I get what I think is only final-drive noise when I spin the axle.
>>
>> Yes, I have filled the final drive with gear oil.
>>
>> Manny had never experienced this issue before, but these hangers come
> from
>> salvage yards and be slightly tweaked if the car was wrecked in a way
> that
>> affected the right front wheel.
>>
>> So, possibilities: A. The hanger isn't quite straight straight, and it's
>> not holding the bearing square with the axle. B. The hanger is too close
> to
>> the final drive (or the bearing isn't seated all the way in the hanger)
> and
>> it's binding axially. C. The slinger (inside dust cover) is rubbing on
>> something and ringing when the hanger is tightened.
>>
>> Questions:
>>
>> Has anybody experienced this issue?
>>
>> Does anybody know if there is a standard piece of pipe that I can use to
>> press against the slinger that covers the inside of the bearing? Or any
>> other advice on how to reseat the bearing? The manual calls for a special
>> tool, but it just looks like a piece of pipe that fits over the axle in a
>> press that bears on the recessed part of the slinger that pushes directly
>> on the bearing.
>>
>> Manny suggested that I could move the axle to the old hanger (they are
> all
>> the same), given that I have a press, but I can't see how to get the
>> slinger over the larger diameter of the seal race and spline on the
>> final-drive end, and I think that slinger is just sheet metal that is
>> crimped on the axle when the right pressing tool is used. Or, I'm missing
>> some obvious point about how it's attached. The slinger covers the
> retainer
>> to provide a dust shield for the bearing seal. I'm just not sure I won't
>> mess up what I have. He also suggested that I could "adjust" the hanger
> so
>> that it hangs at the right place, but my attempts to do that have not
>> solved the problem. I even wondered if I could put a thin washer under
> the
>> hanger, but I don't know what the axial tolerance is supposed to be.
>>
>> Alternative is to ask Manny to ship me a replacement 3.21 FD
> intermediate
>> axle if he has one available, and send this one back for his far more
>> expert inspection.
>>
>> Rick "advice welcome" Denney
>>
>> --
>> '73 X-Glacier 230 "Jaws"
>> Northern Virginia
>> Offlist email: rick at rickdenney dot com
>> _______________________________________________
>> GMCnet mailing list
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> _______________________________________________
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--
Rick Denney
73 x-Glacier 230 "Jaws"
Off-list email to rick at rickdenney dot com
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[GMCnet] Final Drive Intermediate Axle questions
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Re: [GMCnet] Final Drive Intermediate Axle questions
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Re: [GMCnet] Final Drive Intermediate Axle questions
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Re: [GMCnet] Final Drive Intermediate Axle questions
By: jhb1 on Tue, 22 August 2017 17:20
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Re: [GMCnet] Final Drive Intermediate Axle questions
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Re: [GMCnet] Final Drive Intermediate Axle questions
By: USAussie on Tue, 22 August 2017 16:03
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Re: [GMCnet] Final Drive Intermediate Axle questions
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Re: [GMCnet] Final Drive Intermediate Axle questions
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Re: [GMCnet] Final Drive Intermediate Axle questions
By: Kosier on Tue, 22 August 2017 22:07
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Re: [GMCnet] Final Drive Intermediate Axle questions
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Re: [GMCnet] Final Drive Intermediate Axle questions
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Re: [GMCnet] Final Drive Intermediate Axle questions
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Re: [GMCnet] Final Drive Intermediate Axle questions
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Re: [GMCnet] Final Drive Intermediate Axle questions
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Re: [GMCnet] Final Drive Intermediate Axle questions
By: Kosier on Wed, 23 August 2017 09:59
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Re: [GMCnet] Final Drive Intermediate Axle questions
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Re: [GMCnet] Final Drive Intermediate Axle questions
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Re: [GMCnet] Final Drive Intermediate Axle questions
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Re: [GMCnet] Final Drive Intermediate Axle questions
By: USAussie on Wed, 23 August 2017 14:59
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Re: [GMCnet] Final Drive Intermediate Axle questions
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Re: [GMCnet] Final Drive Intermediate Axle questions
By: jimk on Wed, 23 August 2017 11:16
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Re: [GMCnet] Final Drive Intermediate Axle questions
By: USAussie on Wed, 23 August 2017 08:33
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Re: [GMCnet] Final Drive Intermediate Axle questions
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Re: [GMCnet] Final Drive Intermediate Axle questions
By: GMC.LES on Wed, 23 August 2017 11:34
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Re: [GMCnet] Final Drive Intermediate Axle questions
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Re: [GMCnet] Final Drive Intermediate Axle questions
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Re: [GMCnet] Final Drive Intermediate Axle questions
By: Kosier on Wed, 23 August 2017 15:20
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Re: [GMCnet] Final Drive Intermediate Axle questions
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Re: [GMCnet] Final Drive Intermediate Axle questions
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Re: [GMCnet] Final Drive Intermediate Axle questions
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Re: [GMCnet] Final Drive Intermediate Axle questions
By: JohnL455 on Wed, 23 August 2017 09:37
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