Input shaft drawings

[Ted Idlof]

I lost drive completely and suddenly at the track. I've gotten far enough into the box and thought about it enough to be pretty sure it's the input shaft. I'm about to open the diff next because I recall Todd Cook saying it could be replaced from inside.

Can someone point me to the diff drawings and whatnot that will give me a clue what I'm looking at when I find the culprit. And how to replace it and whatever collatoral damage there may be.

But mostly, to not sound entirely stupid if I need to call Scotty. <Which I will, but that's another story.>

TIA.

[SCOTTY81]

Ted..... Call me anytime...There are no stupid questions.......

Start by pulling the left side plate , and then pull the diff out.
It will most likely be the input shaft...or the lack of splines in the clutch disc..

[glenn cooper]

onea the CV's did not STB and come completely apart, with all the ejected balls rolling around inside das CV boot?

Same result - bag O' neutrals...

[Ted Idlof]

Hey Glenn, I did check the CV's first off and they're all good. Took the gear box off, the diff out and did find the input shaft sheared at the circlip groove.

Got a bit sidetracked with an old post from Todd Cook who said I could R&R the shaft from inside the diff. Not sure what he was talking about since the shaft is 11" long and the inside clearance in the diff is only 7-8". Even if the shaft was broken in the middle and removed from inside, you can't get a new one inserted from inside. Duh. Took a couple of shots of Patron after a six pack for that light to go on. I mean, who am I to question Todd.

For anyone wondering or reading this in the future; I pulled the tranny and the shaft comes out cleanly. Per Scotty's recommendation, do not attempt to pull the input shaft out by removing the layshaft needle bearing unless you've done it before and you're really a brain surgeon. Pulling the tranny is the way to go for us clumsy common folk.

For anyone chasing down a suspected input shaft failure, pull the gear stack completely out and look or stick your finger in the layshaft hole to the diff. If there's no coupler (female splined receiver) firmly in place to receive the layshaft splines, it's laying on the bottom of the diff along with part of the input shaft. Take the left side diff cover off, the diff out and hopefully retrieve the coupler, circlip and a cleanly broken input shaft end. Order up the parts and remove/replace the shaft thru the seal in the clutch side of the tranny.

Also, as Scotty suggests, inspect the gears and do a thorough gear box maintenance, as some problem in the gear stack may have caused the input shaft failure.