915 lsd ?

[70SC]

I have a 915 trans # 915/ 61/ 12 / 7770 . It should be a LSD . But when i turn the rear wheel the other wheel turns the opposite direction. This means open diff correct ?!?!

[930 slant nose]

yup

[70SC]

I guess i am part of the 40 % that doesn't have LSD with a 12 in the trans #

[Mitch Leland]

70SC,

Do you know if you have the original trans-axle in the car? In my case someone replaced my trans-axle with a non LSD rear end. I've been told that people will swap out the tans-axles to get the LSD...

[70SC]

Hi Mitch . as you can see from my name 70 SC . My car is a 70 with a 81 SC motor & trans.

[Mitch Leland]

Originally Posted by 70SC

Hi Mitch . as you can see from my name 70 SC . My car is a 70 with a 81 SC motor & trans.

The SC went right by me... What a great combination.

Thanks,

[Bill Verburg]

Originally Posted by 70SC

I have a 915 trans # 915/ 61/ 12 / 7770 . It should be a LSD . But when i turn the rear wheel the other wheel turns the opposite direction. This means open diff correct ?!?!

Not necessarily. It only means that the lsd, if present, isn't functioning as a lsd at light load.

There could be several reasons for this,

most likely, the lsd plates are so worn that there is little or no preload left and/or the worn friction plates are no longer grabbing as they should

the lsd could have intentionally been setup w/ little or no preload, which causes it to be less effective w/o a load relying instead on the ramps to force the plates together under load

[djcdmv]

Isn't it true that the trans should be in neutral for this test. If it is in gear, then the other wheel will turn in the opposite direction.

[70SC]

A+ Yes in neutral

[DRACO A5OG]

+1 in Neutral Both Wheels Spinning = LSD, just checked.