915 Limited Slip in a 914/901 transaxle? Options

[Eddie914]

I have found a 915 transaxle with Limited Slip.

Can the 915 Limited Slip differential be used in 914/901 Transaxle?

I believe I will have to use the six bolt output flanges.

Will 944 axles need to be used? Will they work with the redrilled 914/4 hubs currently on the ' 71 914/4 six cylinder conversion?

Thanks

Eddie

[Eddie914]

Aaron,

Wow! Great diagram.

What mods are required to the 914 axle?

What are the specifications on the custom spacer?

Thanks a bunch.

Eddie

[Aaron Cox]

a quick search for 944 axle should bring up mods....

axle has a lip that needs to be turned off....
the custom spacer resides where the 944 dust seal would go......

sorry for big pic... shiny part is where spacer needs to go
(IMG:http://www.914world.com/bbs2/uploads/blog-1126656519.jpg)

[brant]

QUOTE (KenH @ Dec 7 2005, 02:49 PM)

The ZF is a friction disk unit.  The amout of slip is the same for accel or decel. Gaurd makes both types of LSDs, Torque Bias & ZF type, which sometimes confuses the discussion. Ken

Ken,

I spoke with Paul Guard.
his clutch type unit Does have different percentages of lock up under acceleration versus decel. You can chose the rates that you want when you buy it or obtain necessary hardware to change it later.

this is what got me to thinking about the ZF brand, possibly free wheeling in decel .....?

but having the ability to set for each characteristic is a good thing. You could get the stability in braking and lessen the parasitic loss when accelerating. When I was researching which type of diff to go with (ZF, GT-clutch, torq-bias) I was considering a GT-clutch with 80% under decel and only 50% under accel in order to "save" horse power in my underpowered car.

After talking with Paul Guard about the torq bias -vs- clutch type.... (and after getting hard data from a 914 on the track with each type) I'm convinced that I'm going to use the Torq bias kind right now for racing. I've personally run a locked diff in 2 different 914's now and am convinced that I'm giving up a lot of horse power. I have it under great authority that the 80% or spools are faster on cars with 350hp, but on my measly little 146hp I'm sure I'm giving up something.

Even Paul himself admitted that the "general rule about Torque bias in autox and clutch type on a race track" was more applicable for a 911 based car and that the TB could work in a mid engined car on a race track.

Still the deciding factor for me what a trustworthy side by side test that was run by a reputable source with a 914, on the same track.

brant

[Eddie914]

Thanks for all the help.

Question:

Are all 944/951 stub axles the same?

Which ones can be used to convert a '71 914 1.7 to six bolt CV joints.

I'm planning on using

914/901 sideshift transaxle
1986 915 LSD and output shafts
1986 951 inner CV joint
1971 914 1.7 axle shaft (modified)
??? 944/951 stub axle with custom spacer
Pre-1974 911 hubs

Thanks

Eddie

'71 914/6 3.2 conversion