Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

2 Pages V  1 2 >  
 Reply to this topicStart new topic
> Loose bearing race in the 915 trans....any fixes?
Joe Bob
post Feb 4 2006, 06:16 PM
Post #1


Retired admin, banned a few times
***************

Group: Members
Posts: 17,427
Joined: 24-December 02
From: Boulder CO
Member No.: 5
Region Association: None
The bottom race in the differential housing is loose....not a good thing. Has anyone come up with a succesfull fix short of replacing the differential housing?

For those unaware as to WHY this is an issue, it spins, it makes a bigger path, it allows slop in the shaft and things get cocked and things then explode.....

Typical weak spot in the 915, especially when a 3.6 is driving it.


(IMG:http://forums.pelicanparts.com/uploads7/trans+0181139098196.jpg)
User is online!Profile CardPM
Go to the top of the page
+Quote Post
Allan
post Feb 4 2006, 06:17 PM
Post #2


Teenerless Weenie
*****

Group: Members
Posts: 8,373
Joined: 5-July 04
From: Western Mesopotamia
Member No.: 2,304
Region Association: Southern California
QUOTE ("*" @ Feb 4 2006, 04:16 PM)
The bottom race in the differential housing is loose....not a good thing. Has anyone come up with a succesfull fix short of replacing the differential housing?

For those unaware as to WHY this is an issue, it spins, it makes a bigger path, it allows slop in the shaft and things get cocked and things then explode.....

Typical weak spot in the 915, especially when a 3.6 is driving it.


(IMG:http://forums.pelicanparts.com/uploads7/trans+0181139098196.jpg)

Is this the tranny outta the 911?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
brp914
post Feb 4 2006, 06:23 PM
Post #3


Unregistered
cases are big $$$ - check out wevo, they'll install a new retainer. around 1500 for both housings, iirc.
Go to the top of the page
+Quote Post
ArtechnikA
post Feb 4 2006, 06:27 PM
Post #4


rich herzog
*****

Group: Members
Posts: 7,390
Joined: 4-April 03
From: Salted Roads, PA
Member No.: 513
Region Association: None
there's always Porsche's solution :-) ...
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Aaron Cox
post Feb 4 2006, 06:35 PM
Post #5


Professional Lawn Dart
***************

Group: Retired Admin
Posts: 24,541
Joined: 1-February 03
From: OC
Member No.: 219
Region Association: Southern California
as said above, wevo has a bearing retainer thing
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Joe Bob
post Feb 4 2006, 06:38 PM
Post #6


Retired admin, banned a few times
***************

Group: Members
Posts: 17,427
Joined: 24-December 02
From: Boulder CO
Member No.: 5
Region Association: None
Yes Alan...the 911 trans decided to give up second gear on a downshift.....there's another thread floating around on the tear down and clean up....

I've been looking at Wevo's site. Spoke with Hayden on the phone....nice guy...answers on a Saturday.....

I'm trying to avoid the 1500 dollar fix....obviously.

OK (IMG:http://www.914world.com/bbs2/html/emoticons/dry.gif) I'll bite.....

What's "porsche's fix"

(IMG:http://www.wevo.com/xt032.jpg)

On the retainer from WEVO....I don't believe that this is a total fix for one that is already loose.....
User is online!Profile CardPM
Go to the top of the page
+Quote Post
Aaron Cox
post Feb 4 2006, 06:39 PM
Post #7


Professional Lawn Dart
***************

Group: Retired Admin
Posts: 24,541
Joined: 1-February 03
From: OC
Member No.: 219
Region Association: Southern California
a new case (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
sixnotfour
post Feb 4 2006, 06:53 PM
Post #8


914 Wizard
**********

Group: Members
Posts: 10,432
Joined: 12-September 04
From: Life Elevated..planet UT.
Member No.: 2,744
Region Association: Rocky Mountains
goose2 has a tranny in the classifieds 80 SC
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Joe Bob
post Feb 4 2006, 06:58 PM
Post #9


Retired admin, banned a few times
***************

Group: Members
Posts: 17,427
Joined: 24-December 02
From: Boulder CO
Member No.: 5
Region Association: None
YEAH...SAW THAT, Thanks...
User is online!Profile CardPM
Go to the top of the page
+Quote Post
Allan
post Feb 4 2006, 07:18 PM
Post #10


Teenerless Weenie
*****

Group: Members
Posts: 8,373
Joined: 5-July 04
From: Western Mesopotamia
Member No.: 2,304
Region Association: Southern California
QUOTE (Aaron Cox @ Feb 4 2006, 04:39 PM)
a new case (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif)

From what I've heard... (IMG:http://www.914world.com/bbs2/html/emoticons/sad.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Joe Bob
post Feb 4 2006, 07:36 PM
Post #11


Retired admin, banned a few times
***************

Group: Members
Posts: 17,427
Joined: 24-December 02
From: Boulder CO
Member No.: 5
Region Association: None
Yep....looks like what I'm leaning towards....
User is online!Profile CardPM
Go to the top of the page
+Quote Post
Dr. Roger
post Feb 4 2006, 07:54 PM
Post #12


A bat out of hell.
****

Group: Members
Posts: 3,944
Joined: 31-January 05
From: Hercules, California
Member No.: 3,533
Region Association: Northern California
I realize that I'm probably one of the most "Primitive Pete" guys around here but...

If your going to replace the case anyways, couldn't you scuff the outer area of the bearing race and the inside of the case and use some JB Weld around the contact area? You wouldnt be able to remove it once hardened but that's what you want... Once that race is gone, tha case would be gone...

Don't laugh, that stuff works minor miracles in high pressure situations.... =-))
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Joe Bob
post Feb 4 2006, 08:02 PM
Post #13


Retired admin, banned a few times
***************

Group: Members
Posts: 17,427
Joined: 24-December 02
From: Boulder CO
Member No.: 5
Region Association: None
When you look at how these transmissions have lasted....how they were originally built and the fact that the NEW parts are BEND OVER here they come.....you might want to consider the long term.

I've known of the race problem for years.....matter of fact Assholio (Brad) mentioned it a few years back....most shops will ball peen hammer the sides, or cut a keyway and set a check key in it....but they all fail.

I plan on keeping this ride for a LONG time and to do so, is to do it right.....CH from Renegade sent me a PM on a guy that MAY have an alternative.....will see what he says....but it's looking like a new upgraded/refurbished differential case from WEVO may be the right thing to do.....

HEY Roger...want those 3 inch spacers????

(IMG:http://www.914world.com/bbs2/html/emoticons/cool_shades.gif)
User is online!Profile CardPM
Go to the top of the page
+Quote Post
J P Stein
post Feb 4 2006, 08:03 PM
Post #14


Irrelevant old fart
*****

Group: Members
Posts: 8,797
Joined: 30-December 02
From: Vancouver, WA
Member No.: 45
Region Association: None
Find a good machinist. Bore the hole .06 OS....on location.
Have em' make an OS new bushing.....shrink to fit.....2-3 thou interference... out of similar hardness material. WAG at about 500 bucks.
"New" case is at least 18 years old, eh?

Brad had another solution in a thread here.....a before "the troubles". Do a search.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Joe Bob
post Feb 4 2006, 08:04 PM
Post #15


Retired admin, banned a few times
***************

Group: Members
Posts: 17,427
Joined: 24-December 02
From: Boulder CO
Member No.: 5
Region Association: None
WEVO's fix
User is online!Profile CardPM
Go to the top of the page
+Quote Post
r_towle
post Feb 4 2006, 08:12 PM
Post #16


Custom Member
***************

Group: Members
Posts: 24,574
Joined: 9-January 03
From: Taxachusetts
Member No.: 124
Region Association: North East States
I was gonna say get it machined round and press in a new oversized race.

They are obtainable...

BUT, I would go for the Wevo solution.

It seems alot more stable and alot less likely to wear out...Stainless bridle looks like the way to go.

Your in there, just do it once.

I like 914's, I just keep opening them till I found one that was tight...

But, with that one, its cheaper to fix what you got.

Rich
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
rick 918-S
post Feb 4 2006, 08:23 PM
Post #17


Hey nice rack! -Celette
***************

Group: Members
Posts: 20,462
Joined: 30-December 02
From: Now in Superior WI
Member No.: 43
Region Association: Northstar Region
I would Grind a slot in the back of the race, install it with JB, then drill a keyway in the case using the slot you ground in the race as a guide. maybe 1/8", then install a 1/8" round key made from a drill bit shank to pin both pieces from moving. Use JB on the pin too. Sounds crude, but we used to do that to Aluminum case Muncie 4 speeds back in the day. They used to stretch the main shaft bearing hole causing the bearing to spin in the housing.

edit: BTW: By grinding the slot in the back of the race, installing it in the case, Then drill it inplace you aviod distorting the race.

Again, sound a little crude, but I've done it and drag raced with a case fixed like this.

Let the flames begin (IMG:http://www.914world.com/bbs2/html/emoticons/Yack.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/laugh.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Joe Bob
post Feb 4 2006, 08:25 PM
Post #18


Retired admin, banned a few times
***************

Group: Members
Posts: 17,427
Joined: 24-December 02
From: Boulder CO
Member No.: 5
Region Association: None
http://tds.loctite.com/tds5/docs/660-EN.PDF
User is online!Profile CardPM
Go to the top of the page
+Quote Post
Britain Smith
post Feb 4 2006, 09:53 PM
Post #19


Nano Member
****

Group: Members
Posts: 2,354
Joined: 27-February 03
From: Hillsboro, OR
Member No.: 364
Please, whatever you do...do it correctly the first time. Instead of ruining the case with all your makeshift solutions, either sell the case with the knowledge that it needs fixing, get it fixed by WEVO, or brake down and find a good one. IMHO, there are less and less good cases around so don't screw up another one and get this one fixed.

-Britain
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Joe Bob
post Feb 4 2006, 10:06 PM
Post #20


Retired admin, banned a few times
***************

Group: Members
Posts: 17,427
Joined: 24-December 02
From: Boulder CO
Member No.: 5
Region Association: None
Downside....3 week turnaround on the WEVO upgrade....

I have to send the trans to him as it's cut/notched for the 3.6.....
User is online!Profile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

2 Pages V  1 2 >
Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 

Display Mode: Standard · Switch to: Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 19th May 2024 - 07:40 PM
Invision Power Board v9.1.4 © 2024  IPS, Inc.
All rights reserved 914World.com © since 2002
914World.com is the fastest growing online 914 community!
We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ...