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 )

> Model Specific Information

914/4: 70 71 72 73 74 75 76 914/6: 70 71 72

> LSD transmission question
Gustl
post May 7 2009, 11:05 AM
Post #1


914 enthusiast & historian
**********

Group: Members
Posts: 11,699
Joined: 16-June 04
From: TIROL / Austria
Member No.: 2,212
Region Association: Austria
o.k. folks, here's my question:

could an original 914-6 transmission with the factory option M220 (limited slip differential) be identified by the transmission number ???

I know the difference at the 914-4 transmission:
HAxxxxx ... 5 speed standard
HBxxxxx ... 5 speed LSD

any input is highly appreceated

(IMG:style_emoticons/default/bye1.gif) Gustl

User is offlineProfile CardPM
Go to the top of the page
+Quote Post
 
 Reply to this topicStart new topic
Replies(1 - 13)
IronHillRestorations
post May 9 2009, 12:43 PM
Post #2


I. I. R. C.
*****

Group: Members
Posts: 6,792
Joined: 18-March 03
From: West TN
Member No.: 439
Region Association: None
I don't know if it applies to 6's, but 4's with LSD had an aluminum tag on one of the side cover nuts.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Katmanken
post May 10 2009, 09:33 AM
Post #3


You haven't seen me if anybody asks...
****

Group: Members
Posts: 4,738
Joined: 14-June 03
From: USA
Member No.: 819
Region Association: Upper MidWest
According to the factory parts manual, the answer is maybe....

1. A 914-6 tranny has a part number of 914.300.012.03 with the -6 gear ratios inside. All trannys for a 914-6 would be drawn from that supply during a factory build. For some reason, the parts book has a column called denomination which has another number for a 914-6 "transmission complete" of 914.300/01

2. The LSD was an option. The parts book has a series of columns labeled "Stuck pro Typ" and it says that the LSD was for "Alle" except the sportomatic.

3. To the left of the "Stuck pro Typ" columns is a column called "Symbol" and under that collumn is the symbol "M". That must be how the factory differentiated "alle" transmissions with the LSD. Now why the Symbol "M" is used by the factory to identify the LSD, and why the factory used the stamped HBxxxxx designation for the change is a mystery.

Has anyone checked a factory built LSD transmission for the symbol "M"????

Ken
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
davep
post May 10 2009, 10:13 AM
Post #4


914 Historian
*****

Group: Benefactors
Posts: 5,220
Joined: 13-October 03
From: Burford, ON, N0E 1A0
Member No.: 1,244
Region Association: Canada
At least by the 1980's the 915 transmissions had a "12" between the transmission type # and the serial # to indicate an LSD. Still trying to find the correct answer for you.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Gustl
post May 10 2009, 11:30 AM
Post #5


914 enthusiast & historian
**********

Group: Members
Posts: 11,699
Joined: 16-June 04
From: TIROL / Austria
Member No.: 2,212
Region Association: Austria
QUOTE(kwales @ May 10 2009, 04:33 PM) *

Has anyone checked a factory built LSD transmission for the symbol "M"????

thanks Ken

this would lead me to the question - is there anybody with a factory original 914-6 LSD transmission (M220) ??

if so, could we get photos of the transmission number - or / and this symbol "M"
would also like to where this symbol "M" is located?

sounds interesting ...

User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Katmanken
post May 12 2009, 12:21 PM
Post #6


You haven't seen me if anybody asks...
****

Group: Members
Posts: 4,738
Joined: 14-June 03
From: USA
Member No.: 819
Region Association: Upper MidWest
What's on the aluminum tag????

The symbol "M"????

Ken
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
HaraldD
post May 13 2009, 12:09 PM
Post #7


Member
**

Group: Members
Posts: 90
Joined: 23-November 08
From: Germany
Member No.: 9,781
Region Association: Germany
Hi!
Here is one of a original 914-6 Tranny with LSD (from the Factory)
Harald

Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Gustl
post May 13 2009, 02:38 PM
Post #8


914 enthusiast & historian
**********

Group: Members
Posts: 11,699
Joined: 16-June 04
From: TIROL / Austria
Member No.: 2,212
Region Association: Austria
thanks Harald (IMG:style_emoticons/default/pray.gif) (IMG:style_emoticons/default/pray.gif) (IMG:style_emoticons/default/pray.gif)
this is exactly what I'm looking for

would be nice if there are more photos to show that this isn't a one off

(IMG:style_emoticons/default/bye1.gif) Gustl
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
davep
post May 18 2009, 06:23 PM
Post #9


914 Historian
*****

Group: Benefactors
Posts: 5,220
Joined: 13-October 03
From: Burford, ON, N0E 1A0
Member No.: 1,244
Region Association: Canada
Since the later 911 transmissions used a 12 to designate an LSD, the practice earlier must have been to use the "10".
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Richard Casto
post May 18 2009, 07:15 PM
Post #10


Blue Sky Motorsports, LLC
***

Group: Members
Posts: 1,465
Joined: 2-August 05
From: Durham, NC
Member No.: 4,523
Region Association: South East States
I have put together a wiki page about the 914 transmission. It is located here...

http://www.roadglue.com/wiki/index.php?tit...14_transmission

As with any wiki, please feel free to jump in an contribute. Particularly those of you who have years of special 914 knowledge hidden away in your brain!

With help from Harald and Gustl, I have added a number of photos of serial numbers. I also have some additional photos that Gustl has sent that I still need to add to the article.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Gustl
post May 18 2009, 11:22 PM
Post #11


914 enthusiast & historian
**********

Group: Members
Posts: 11,699
Joined: 16-June 04
From: TIROL / Austria
Member No.: 2,212
Region Association: Austria
QUOTE(davep @ May 19 2009, 01:23 AM) *

Since the later 911 transmissions used a 12 to designate an LSD, the practice earlier must have been to use the "10".

from what I found out yet, I believe that the "10" indicates the 80/20 LSD (like used at the 914) while the "12" indicates the later used 60/40 LSD tranny

(IMG:style_emoticons/default/bye1.gif) Gustl
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
davep
post May 21 2009, 09:12 AM
Post #12


914 Historian
*****

Group: Benefactors
Posts: 5,220
Joined: 13-October 03
From: Burford, ON, N0E 1A0
Member No.: 1,244
Region Association: Canada
Ah, excellent information. I wonder what '11' would represent then; something intermediate perhaps?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Gustl
post May 21 2009, 03:13 PM
Post #13


914 enthusiast & historian
**********

Group: Members
Posts: 11,699
Joined: 16-June 04
From: TIROL / Austria
Member No.: 2,212
Region Association: Austria
the logical consequence would be 70/30 ... but I didn't find anything about an odd number
in fact, I hardly find anything at all ...
I even don't know if Porsche ever used a 70/30 LSD at all
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Tom_T
post May 26 2009, 07:06 PM
Post #14


TMI....
*****

Group: Members
Posts: 8,320
Joined: 19-March 09
From: Orange, CA
Member No.: 10,181
Region Association: Southern California
QUOTE(Richard Casto @ May 18 2009, 06:15 PM) *

I have put together a wiki page about the 914 transmission. It is located here...

http://www.roadglue.com/wiki/index.php?tit...14_transmission

As with any wiki, please feel free to jump in an contribute. Particularly those of you who have years of special 914 knowledge hidden away in your brain!

With help from Harald and Gustl, I have added a number of photos of serial numbers. I also have some additional photos that Gustl has sent that I still need to add to the article.


According to the charts at the web link above, the /11 & /12 on 914-4 tranny's refers to the tail or side shift configuration respectively - although that info may not be completely correct -
unless the basic case was interchangeable for tail or side shifter setups? (IMG:style_emoticons/default/confused24.gif)

I say this because my mechanic - Hans of Hans Imports - had used a "used replacement case" to rebuild my early 73 2L side-shifter back in 12/83, when it's original case was too worn-out inside to use - see the pic of my current used case # below:

"HA" transaxle # used in rebuild for my 1973 914-2.0 (VIN 4732901954 & Engine GA000424 & still matching nos. from 9/72 build date):

Attached Image


Sorry to add to the confusion here, as I was only drawn to this post to figure out what LSD stood for, after seeing it in the parts forum! (IMG:style_emoticons/default/wacko.gif)

...but hopefully it adds to the forum, & feel free to use it on the tranny article - but please leave off my VIN & Engine numbers there!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · Originality and History · Next Newest »
 

Reply to this topicStart new topic
3 User(s) are reading this topic (3 Guests and 0 Anonymous Users)
0 Members:

 

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

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

- Lo-Fi Version Time is now: 26th December 2024 - 06:13 AM
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 ...