Q's about input shaft 4l60e
 

Lets start out by saying the trans died no forward gears or reverse.So we take the trans out look for damage only thing we can find is the input shaft feels like it is stripped you can put the trans in drive and hold the tail shaft and the input shaft still turns but feels like it is stripped.If you turn the input shaft real slow it will turn the tail shaft but if you apply force to the tail shaft it starts to feel like it is stripped. I have limted trans knowledge so any help would be appriciated :bang:

Sounds like something broke the input shaft could have stripped inside the input drum but I havent seen that much but of course with the trans out of the car you just relying on drag to turn the shafts to really have any idea you will have to open it up

I am thinking it is stripped because it has very low drag when you try to turn it,and dose not feel like it is spinning anything inside i am goig to open it up in the morning thanks for the help.

Let me know what you find I will be curious

ok I will

Sounds normal to me. It doesn't need to be in drive, just out of park, it'll do the same thing in reverse on the bench. With no fluid pumping no clutches are going to engage.

Same theory with any A4 car thats together, put the rear up on jackstands and start it up, the wheels will move forward if you put it in neutral. It's just clutch drag.

but the input shaft feels like it is stripped.When you turn it real slow it spins smooth but as you turn it faster it makes a grinding feel like it stripped.

Oh, well thats something then. I'd have it apart by now, finding broken stuff is fun.

I guess i am going to have to order the torx plus 50 bit so i can get the bell housing off :confused:

Here are some pictures of the damage :D

Ok thats wasnt the input shaft breaking or stripping that was the drum not to much you can do to prevent that but its rare I have only seen two in 15 years.

I'm not sure if I agree with the above statement. I have seen this dozens of times in the years of building these units in high performance applications. I guess that is where we differ in experience. Vince

I can say that this calendar year we have seen at least 4 drums grenaded similar to the one in the pics! But we deal with a bunch of power added DD / Track cars too.

Be sure to install a "sleeved" input drum. That will dramatically reduce the odds of that happening again in the future! By the sounds of your powertrain package... low gears, nitrous etc... you owe it to yourself to do this upgrade if nothing else. ACE and FLT install those upgraded drums in our performance units. Remember, you get what you pay for!

Good Luck with the build!

g

If you look at the pictures that where posted in this thread, you can see where the spline area shattered. This is where the sleeve would be pressed on. I believe this failure happens when the shaft is loose in the drum. In this case a sleeved drum would of helped and this is a perfect example as to why we do it. Vince