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Getrag axle wobble by donuteater306
Started on: 10-05-2020 10:33 AM
Replies: 15 (221 views)
Last post by: Larryinkc on 10-15-2020 09:34 AM
donuteater306
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Report this Post10-05-2020 10:33 AM Click Here to See the Profile for donuteater306Click Here to Email donuteater306Send a Private Message to donuteater306Edit/Delete MessageReply w/QuoteDirect Link to This Post
Saw a drip coming from the right axle seal, grabbed the axle and shook it up and down..discovered what I believe is excessive play. I’m assuming the output bearing is bad, but I don’t have a lot of experience with this transmission. Am I lookin at a rebuild, or is this normal for these? It’s not making any noise, yet.
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Raydar
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Report this Post10-05-2020 11:43 AM Click Here to See the Profile for RaydarClick Here to Email RaydarSend a Private Message to RaydarEdit/Delete MessageReply w/QuoteDirect Link to This Post
A little bit of play is to be expected. (Nobody, to my knowledge, has ever specified *how much*, but a little...)
What you don't want to see, when you shake it up and down, is up and down movement of the axle on the other side. If that's the case, then your bearings are worn.
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donuteater306
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Report this Post10-05-2020 12:41 PM Click Here to See the Profile for donuteater306Click Here to Email donuteater306Send a Private Message to donuteater306Edit/Delete MessageReply w/QuoteDirect Link to This Post
Good to know, thanks for the tip. I’ll have to crawl back under there and see what happens. Has anyone used those stabilizing bearings from the Fiero store?
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Larryinkc
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Report this Post10-05-2020 04:59 PM Click Here to See the Profile for LarryinkcSend a Private Message to LarryinkcEdit/Delete MessageReply w/QuoteDirect Link to This Post
I used these on my Getrag. Did this several years and several thousand miles ago, so far all is good.

http://www.fiero.nl/forum/Forum2/HTML/140014.html
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donuteater306
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Report this Post10-06-2020 02:15 PM Click Here to See the Profile for donuteater306Click Here to Email donuteater306Send a Private Message to donuteater306Edit/Delete MessageReply w/QuoteDirect Link to This Post
Thank you, I’ve never seen those...but I also didn’t know that some wobble is normal. I’m really curious about those Fiero Store support bearings. Looks like a simple (But expensive) solution.
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jonnyp
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Report this Post10-06-2020 02:40 PM Click Here to See the Profile for jonnypClick Here to Email jonnypSend a Private Message to jonnypEdit/Delete MessageReply w/QuoteDirect Link to This Post
When I purchased my 88 GT 5 speed two years ago, the driver's side seal leaked while driving. The previous owner said he had the seal replaced twice, but it did not stop the leak.

See Rodney Dickman's article describing how to check for wear of the differential output bearings: http://my.execpc.com/~rodney1/getraginfo.htm

After I bought the car, I checked the differential play by rocking the CV tripod housing on the driver's side, and sure enough there was a decent amount of movement of the passenger side tripod housing. There was a bit of "hum" while driving in 2nd and 3rd gears, but not overly excessive.

Heeding Rodney's advice, I ended up dropping the cradle and sending the transmission in for a partial rebuild. Luckily, my guy was able to find a full bearing kit for the 282. When I went to pick it up, he said the output bearings fell apart as soon as he cracked open the case.

My car only has 47k miles, so think Rodney's assessment of the 282's weaknesses is on point.

JP
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Larryinkc
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Report this Post10-06-2020 08:02 PM Click Here to See the Profile for LarryinkcSend a Private Message to LarryinkcEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by donuteater306:

Thank you, I’ve never seen those...but I also didn’t know that some wobble is normal. I’m really curious about those Fiero Store support bearings. Looks like a simple (But expensive) solution.



My thoughts are that the Fiero Store support bearings look like the needle bearing runs directly on the axle shaft surface which was was not intended to use as a bearing surface. The GM support bearing kits have a sleeve that goes over the axle shaft that is a bearing surface which should be better.
The GM bearings show up on ebay in the $30 to $50 range but take a bit of effort to make them work. Part numbers to search are 8643931 or K75125.
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donuteater306
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Report this Post10-07-2020 09:32 PM Click Here to See the Profile for donuteater306Click Here to Email donuteater306Send a Private Message to donuteater306Edit/Delete MessageReply w/QuoteDirect Link to This Post
Good catch Larry. I wonder if anyone has had issued with them.

Great info. Jonny, thanks you guys for your help. I really appreciate your experience.

[This message has been edited by donuteater306 (edited 10-07-2020).]

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Larryinkc
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Report this Post10-07-2020 10:59 PM Click Here to See the Profile for LarryinkcSend a Private Message to LarryinkcEdit/Delete MessageReply w/QuoteDirect Link to This Post
My car is a Series III 3800 swap, I have several thousand miles on the GM axle stabilizers and no leaks.
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donuteater306
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Report this Post10-09-2020 10:48 AM Click Here to See the Profile for donuteater306Click Here to Email donuteater306Send a Private Message to donuteater306Edit/Delete MessageReply w/QuoteDirect Link to This Post
Silly question. Do I need one or two of those kits?
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Larryinkc
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Report this Post10-09-2020 12:43 PM Click Here to See the Profile for LarryinkcSend a Private Message to LarryinkcEdit/Delete MessageReply w/QuoteDirect Link to This Post
One kit per side. It takes a little modification to use them. I show what I did in this thread.


http://www.fiero.nl/forum/Forum2/HTML/140014.html
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donuteater306
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Report this Post10-09-2020 02:03 PM Click Here to See the Profile for donuteater306Click Here to Email donuteater306Send a Private Message to donuteater306Edit/Delete MessageReply w/QuoteDirect Link to This Post
Thank you, I’ve never seen those...but I also didn’t know that some wobble is normal. I’m really curious about those Fiero Store support bearings. Looks like a simple (But expensive) solution.
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donuteater306
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Report this Post10-09-2020 02:10 PM Click Here to See the Profile for donuteater306Click Here to Email donuteater306Send a Private Message to donuteater306Edit/Delete MessageReply w/QuoteDirect Link to This Post
Some how I duplicated a reply. Disregard my previous post. I assumed it was one kit per side, so I had ordered two. Looking at your like the other day, it looks like you only had to modify the one side by cutting notches but the other side was perfect fit. Any idea what size the bolts were that you used in place of the factory ones?
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Larryinkc
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Report this Post10-11-2020 07:30 PM Click Here to See the Profile for LarryinkcSend a Private Message to LarryinkcEdit/Delete MessageReply w/QuoteDirect Link to This Post
The bolt holes in my Getrag did not have any bolts in them, I don;t remember what size I used.

I had to grind two areas on the driver side bearing carrier to clear two raised tabs on the transmission. They are the areas outlined in red.

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donuteater306
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Report this Post10-15-2020 12:53 AM Click Here to See the Profile for donuteater306Click Here to Email donuteater306Send a Private Message to donuteater306Edit/Delete MessageReply w/QuoteDirect Link to This Post
Both kits arrived. Looks like for the driver's side, you welded two brackets together?
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Report this Post10-15-2020 09:34 AM Click Here to See the Profile for LarryinkcSend a Private Message to LarryinkcEdit/Delete MessageReply w/QuoteDirect Link to This Post
I did use both brackets welded together on the drivers side to make a more rigid retainer for the stabilizer.
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