One Amazing Story Options

[scotty b]

I had that happen. I bought a 915 off of Pelican Parts to temporarily replace the 915 in my 911 when it got stuck in second gear. $1000 it cost me and I thought that was a pretty good deal because I hadn't seen another for less than $1500 - $2000.

Then when McMark and I were putting the engine and transmission back in the 911, Mark says 'hey, did you know this is an LSD?' Ummm... no. (IMG:style_emoticons/default/blink.gif) Made a good deal much better!

Nice score Gerold (IMG:style_emoticons/default/smilie_pokal.gif)

(IMG:style_emoticons/default/idea.gif) Not sure I've checked my 915's

I got an early 944 tranny last year for the taller 5th gear in it, for 150.00 Looked inside the bellhousing and could faintly see a junkyard pen marking " LSD " . Turned the flanges and sure enough (IMG:style_emoticons/default/first.gif) They are out there.

[ConeDodger]

So would this have been a special order car then or added later? What was the cost way back then? Very interesting, thanks for sharing.

I don't know to be honest. I'm thinking of ordering a COA for just to see what Porsche says.

Transmission might be from an earlier 914-6?

[SirAndy]

I turned the output flanges and I could not believe it, this trans has and LSD!
A no option 4 cylinder with an LSD what are the chances. Garold you are a lucky man!

Schweet! (IMG:style_emoticons/default/first.gif)

[rnellums]

Buying every 914 in sight is bound to have some upsides! (IMG:style_emoticons/default/aktion035.gif)

[turk22]

Guys,

At the risk of sounding like a complete dufus, what are the advantages of the Limited Slip Diff, and how can I tell if I have it?

Since it was only a special order, is there any idea on how many are out there?
Did it become standard at some point on the later MY's or did it always remain an option?

How does it improve the 914 specifically

(man I know I'm gonna get bashed but I just hafta know...) (IMG:style_emoticons/default/chair.gif)

Turk

[scotty b]

Guys,

At the risk of sounding like a complete dufus, what are the advantages of the Limited Slip Diff, and how can I tell if I have it?

Since it was only a special order, is there any idea on how many are out there?
Did it become standard at some point on the later MY's or did it always remain an option?

How does it improve the 914 specifically

(man I know I'm gonna get bashed but I just hafta know...) (IMG:style_emoticons/default/chair.gif)

Turk

Put very simply:

an open ( standard ) diff only puts power to one wheel. A LSD puts power to both wheels, thus improving traction by keeping both wheels under load

to check, hold both output flanges and turn one. If it turns and the other doesn't you have a standard diff. If while trying to turn one side, the other side tries to turn in the same direction, CONGRATULATIONS you have a weener

[IronHillRestorations]

Well this confirms what Brad Mayeur told me about the transmissions with an aluminum tag.
(75 guys are now scrounging through all old transmissions to find one with an aluminum tag)

A limited slip does just that, it limits the slip and locks the diff so both wheels turn. A normal open diff will allow one wheel to be stationary, while the other one slips.

This is very good on a high HP car. A early 914-4 would probably have one for snow.

[turk22]

Guys,

At the risk of sounding like a complete dufus, what are the advantages of the Limited Slip Diff, and how can I tell if I have it?

Since it was only a special order, is there any idea on how many are out there?
Did it become standard at some point on the later MY's or did it always remain an option?

How does it improve the 914 specifically

(man I know I'm gonna get bashed but I just hafta know...) (IMG:style_emoticons/default/chair.gif)

Turk

Put very simply:

an open ( standard ) diff only puts power to one wheel. A LSD puts power to both wheels, thus improving traction by keeping both wheels under load

to check, hold both output flanges and turn one. If it turns and the other doesn't you have a standard diff. If while trying to turn one side, the other side tries to turn in the same direction, CONGRATULATIONS you have a weener

thanks Scotty, I guess that explains the valve adjustment process of keeping one wheel on the ground or otherwise immobile, and turning the other to get to TDC.

Would that mean if you had an LSD, then you couldn't do that?

[scotty b]

Guys,

At the risk of sounding like a complete dufus, what are the advantages of the Limited Slip Diff, and how can I tell if I have it?

Since it was only a special order, is there any idea on how many are out there?
Did it become standard at some point on the later MY's or did it always remain an option?

How does it improve the 914 specifically

(man I know I'm gonna get bashed but I just hafta know...) (IMG:style_emoticons/default/chair.gif)

Turk

Put very simply:

an open ( standard ) diff only puts power to one wheel. A LSD puts power to both wheels, thus improving traction by keeping both wheels under load

to check, hold both output flanges and turn one. If it turns and the other doesn't you have a standard diff. If while trying to turn one side, the other side tries to turn in the same direction, CONGRATULATIONS you have a weener

thanks Scotty, I guess that explains the valve adjustment process of keeping one wheel on the ground or otherwise immobile, and turning the other to get to TDC.

Would that mean if you had an LSD, then you couldn't do that?

It wouldn't make any difference with a LSD. You're just using the engaged trans to turn the engine over. It doesn't matter which wheel is or isn't engaged

[GaroldShaffer]

Glenn came over today and we wacked another parts car, very rusty with some very bad welding done to it. He also brought the trans with him (IMG:style_emoticons/default/smilie_pokal.gif) it is a way cool thing indeed.

[wingnut86]

Silly Germans, that's what happens when you put a tap in the lunchroom!!!

[SirAndy]

A early 914-4 would probably have one for snow.

(IMG:style_emoticons/default/agree.gif)

Back in the day this was relatively common in Europe in areas that see at lot of snow.
(IMG:style_emoticons/default/driving.gif)

[Middlefour]

Hello all, well that makes 2 four cylinder cars with an LSD that I know of, this one and mine. My car was a special order in 1970 for a customer in Washington City and not only did it have the LSD specified but tinted windows as well. I know my car is the only 4 in the UK with an LSD and possible the only 914 of any sort with the factory fitted option. Not only that but in all my meetings with 914 owners from across Europe I have yet to find anybody with an LSD in a 4 cylinder car!! Like this car mine had no appearance pack, also the heater blower was deleted and the engine tinware holes plated over. I have had the car for 18 years now and this is the first time I have found another 4 with an LSD, an exclusive 'club' indeed. Some years ago the box lost first gear and a fellow 914 owner who competed in hill climbs offered to replace my LSD with a standard box, all refurbished and redo any other bits and pieces like the gear change linkage if he could have my box, well it was with the car when it was new so it stayed with the car. I found a Porsche specialist to do a full rebuild, cost quite a lot, but never regretted it.
Cheers
Steve

[rgalla9146]

A early 914-4 would probably have one for snow.

(IMG:style_emoticons/default/agree.gif)

Back in the day this was relatively common in Europe in areas that see at lot of snow.
(IMG:style_emoticons/default/driving.gif)

Scored LSD's in two seperate deals.
One (a rear shifter) amazingly from a guy who claimed to have rebuilt the trans but didn't know of the tag or the trans code or the standard test of turning one flange.
The "rebuilt " consisted of painting the trans silver ! Still it was a good deal for the money.
The second (a side shifter) came with a "916" project.
The guy couldn't get anyone to come to see a project that included 4 NOS fenders, S cams ,1 911 trans, 2 914 transaxles (one a LSD )and a whole pile of other very good stuff.
He didn't know about the LSD until I discovered it when loading it on my truck.
Both have a home here.
Anyone have a source for ZF LSD rebuild parts ?

[gms]

Steve and Rory I would be interested in seeing the serial numbers on your cases!
I have been thru about 100 transmissions and never seen a factory equipped box.
My GT has a 904 LSD unit installed by Stoddard when they build the car.

[gms]

Transmission might be from an earlier 914-6?

Rob, the case is a 914/11/10 which is a tail shifter 4

[rgalla9146]

Transmission might be from an earlier 914-6?

Rob, the case is a 914/11/10 which is a tail shifter 4

Glenn
Some weather issues around here lately.
Type and serials to be supplied.
Rory

[Richard Casto]

Thanks for sharing Glenn. It is nice to see photos of the tag and the stamping on the case.

Richard

[rgalla9146]

Thanks for sharing Glenn. It is nice to see photos of the tag and the stamping on the case.

Richard

Glenn
The rear shifter has the Shell SD ( spurr diff ) tag at 11oclock on a diff cover stud.
On the bottom spline of the trans is 914 / 11 / 10 HB 001 7521 I don't know the VIN of the original car but the trans has the early intermediate plate drilled for the throttle bellcrank but does not have the cable loop on the diff cover. I guess it is possible that it could be a 6 trans with a 4 rear cover. It will soon have a 6 rear cover.
The side shifter has no distinguishing features but does have the Shell diff. lube. tag in the same location. The only identification on the bottom spline is HB 15 11 2
There is no evidence of tampering or grinding on either side of these characters.
I don't have any info on the VIN of the original car. I suspect it could be from a '73 2.0 that I purchased in parts. When time permits I'll look for casting date codes.
Hope this info is helpful.
Rory

[rgalla9146]

Thanks for sharing Glenn. It is nice to see photos of the tag and the stamping on the case.

Richard

Glenn
The rear shifter has the Shell SD ( spurr diff ) tag at 11oclock on a diff cover stud.
On the bottom spline of the trans is 914 / 11 / 10 HB 001 7521 I don't know the VIN of the original car but the trans has the early intermediate plate drilled for the throttle bellcrank but does not have the cable loop on the diff cover. I guess it is possible that it could be a 6 trans with a 4 rear cover. It will soon have a 6 rear cover.
The side shifter has no distinguishing features but does have the Shell diff. lube. tag in the same location. The only identification on the bottom spline is HB 15 11 2
There is no evidence of tampering or grinding on either side of these characters.
I don't have any info on the VIN of the original car. I suspect it could be from a '73 2.0 that I purchased in parts. When time permits I'll look for casting date codes.
Hope this info is helpful.
Rory

Glenn
I now realize that the 001 in my tag probably indicates 1971 production.
I haven't checked either trans for 904 mainshaft, special ratios or final drive ratio.
Rory