Weakest link theory proven correct... again

[blufie]

I broke the car... again...

I have been working on getting my new 360/727 dialed in on my 68 cuda and had a driveshaft issue and rear trans leak. Today I recieved my new Spicer 1350 shaft and pinion and got it installed, ran it for a shakedown test and on a very robust "roast the tires through first gear" run :toothy10:... the rear end let go. It's a well worn original 8 3/4 3.23 pumpkin so was on the list to be redone anyway but I was hoping it would give me some more cruzin time before the big boom. Still was a fun pull 8)...

I probably screwed up the pinion preload when I changed the pinion over to 1350 but it could also be just time to replace.

 

[GoFish]

That sucks. I'm getting ready to order the driveshaft for my Scamp with the same motor/tranny combination and that's my worry...Hope I have better luck than you!

 

[oldkimmer]

.............Dont 4get 2 pull ur tranny as u probably broke the sprag..........kim.......better 2 b safe than sorry.........

 

[blufie]

Just for those who troll this later...

My issue was I used Yukon Axles that were a bit too short because I had the split-spline style sure-grip and was only engaging 1/4 inch in the spiders. I spun the top 1/4 of teeth off my axle.

Trans was OK but am still beefing it up with new super sprag and billet drums.

Yukon makes an axle that is a bit longer for this issue but I forgot I had switched my sure grip out a while back. The sure grips can be rebuiilt with solid style spline gears and the axles are still useable (Thanks to Dr. Diff aka Cass who is a wealth of info and help!).