 Help identifying this transmission |
|
|
|
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. |
|
|
  |
| mate914 |
 Jan 15 2021, 07:43 AM
Post
#1
|
|
Matt  Group: Members Posts: 737 Joined: 27-February 09 From: Eagles mere, PA Member No.: 10,102 Region Association: North East States 
 |
I am about to endeavor a few transmission rebuilts. As I was collecting my specimens I noticed one was different. Can someone please shed some light on this transmission. It is a side shift right now. Photo lower right shows flange on bell housing.
  |
   |
 
|
| rgalla9146 |
Jan 15 2021, 08:26 AM
Post
#2
|
|
Advanced Member Group: Members Posts: 4,545 Joined: 23-November 05 From: Paramus NJ Member No.: 5,176 Region Association: None
|
A trans with a 911 prefix is for a '70-'71 911.
Next came the 915 The '911' trans was the first to incorporate a 'pull' type pressure plate. It has cast in features that the clutch tube and cable are guided by/attached to. The one on the right (upside down) appears to be a 911 type.....that flange secures the end of the clutch cable. What rear cover is on that trans ? If it has a 914 rear cover it was probably mated to a later engine to use the pull type clutch. Don't forget this involves flipping the ring and pinion and FULL re-set of all tolerances. |
|
|
|
| 914Sixer |
Jan 15 2021, 10:57 AM
Post
#3
|
|
914 Guru Group: Members Posts: 8,870 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region
|
If the side shift conversion has been done, maybe the ring and pinion have been flipped.
|
|
|
|
| rgalla9146 |
Jan 15 2021, 11:24 AM
Post
#4
|
|
Advanced Member Group: Members Posts: 4,545 Joined: 23-November 05 From: Paramus NJ Member No.: 5,176 Region Association: None
|
QUOTE(914Sixer @ Jan 15 2021, 11:57 AM)  If the side shift conversion has been done, maybe the ring and pinion have been flipped. Mark is right, looks to be set up for side shift so probably flipped. Finger crossed for correct set up. |
|
|
|
| mate914 |
Jan 15 2021, 11:34 AM
Post
#5
|
|
Matt Group: Members Posts: 737 Joined: 27-February 09 From: Eagles mere, PA Member No.: 10,102 Region Association: North East States
|
It came with a parts car many years ago. It was Attached to a 2.0 /4 .
Tail is # 914.301.302.00 Matt |
|
|
|
| mate914 |
Jan 15 2021, 11:38 AM
Post
#6
|
|
Matt Group: Members Posts: 737 Joined: 27-February 09 From: Eagles mere, PA Member No.: 10,102 Region Association: North East States
|
The car that it was in looked like it had been driven for many years. The car just suffered from East Coast cancer a.k.a. rust.
|
|
|
|
| oldie914 |
Jan 15 2021, 12:38 PM
Post
#7
|
|
Member Group: Members Posts: 102 Joined: 2-May 10 From: Germany Member No.: 11,680 Region Association: None |
Looks like this case is a 1970/71 911 surplus casting that was used for a 914 transmission. I've seen a couple like this. The castings were machined with the vent in the 914 position and did not have the steel reinforcing plates inside the differential carrier housing needed for the pull clutch on the 911. Throwout bearing arm pivot location was also drilled in the right place for the 914.
|
|
|
|
| davep |
Jan 15 2021, 04:36 PM
Post
#8
|
|
914 Historian Group: Benefactors Posts: 5,137 Joined: 13-October 03 From: Burford, ON, N0E 1A0 Member No.: 1,244 Region Association: Canada  |
It would be very useful for me to know the serial #'s of all the transmissions you have. The odd case is certainly a 70/71 version, and of the later variant since it has the side pad for the serial # off of the central rib. This case was also used for the 914/6. Now the question is was it originally for a 911 or for a 914/6; the answer lies with the vent location and if both locations were drilled & tapped.
|
|
|
|
| rgalla9146 |
Jan 15 2021, 07:37 PM
Post
#9
|
|
Advanced Member Group: Members Posts: 4,545 Joined: 23-November 05 From: Paramus NJ Member No.: 5,176 Region Association: None
|
No guide loop on diff cover casting....as seen on '70-'71 911
|
|
|
|
| oldie914 |
Jan 16 2021, 04:12 AM
Post
#10
|
|
Member Group: Members Posts: 102 Joined: 2-May 10 From: Germany Member No.: 11,680 Region Association: None |
The throwout bearing arm pivot for the pull clutch on a 1970/71 911 transmission was in a different location than for the push clutch. Attached are pictures of a 1970 case converted for use in a 1969 911 including details of the reinforcing plate for the pull clutch pivot.
Also pictures of the bottom of the case showing the pad for the serial number was not included on the early cases.     |
|
|
|
| mate914 |
Jan 16 2021, 10:27 AM
Post
#11
|
|
Matt Group: Members Posts: 737 Joined: 27-February 09 From: Eagles mere, PA Member No.: 10,102 Region Association: North East States
|
Here are more pics....
  |
|
|
|
| mate914 |
Jan 16 2021, 10:28 AM
Post
#12
|
|
Matt Group: Members Posts: 737 Joined: 27-February 09 From: Eagles mere, PA Member No.: 10,102 Region Association: North East States
|
I cleaned it all up. I could not find any numbers on the transmission. I will know more when I pull it apart.
|
|
|
|
| mate914 |
Jan 16 2021, 01:47 PM
Post
#13
|
|
Matt Group: Members Posts: 737 Joined: 27-February 09 From: Eagles mere, PA Member No.: 10,102 Region Association: North East States
|
 |
|
|
|
| gms |
Jan 19 2021, 09:59 PM
Post
#14
|
|
Advanced Member Group: Members Posts: 2,694 Joined: 12-March 04 From: Chicagoland Member No.: 1,785 Region Association: Upper MidWest
|
This is an unstamped case used for 911s and 914/6s
the type and serial number would be stamped on the flat area  |
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 25th April 2024 - 07:44 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.