Sierra transmission leak part 2

[Herz]

So my 4.3 sierra with the 5 speed transmission started leaking from the top. I thought at first it was just the fluid level over full but I checked and it was fine. I even drained all the gear oil and replaced it. The [censored] thing still leaks. It is leaking from the top of the transmission where it meets the rubber bushing deal that covers the shifter.



The model transmission is a nv3500. I am certain for a fact it is leaking from there, I checked the rear seal and all the sensors for leaks and they are good. I actully can see the fluid come from there down to the ground hehe.

what causes this and do I have to drop the transmission to fix it.

 

[FL_Rob]

http://docs.google.com/viewer?a=v&q=cache:lkqvugTb-TQJ:hurst-shifters.com/hurst-shifter/PDF%2520Files/instructionsheets/3910140.pdf+nv+3500+top+seal&hl=en&gl=us&pid=bl&srcid=ADGEEShPR8RcKCfukGwwEsvg1wwj0PPCUICVln_kmuHyggFoU0VqhqvjvZ_47roLEVmaZkUu_x2ougoU3nmiSxwAGqNXDdLKLC9uRjqJ62H21xYlneSBmiXjhGtD1qieIpmwREA64XYq&sig=AHIEtbTpL4tOjvjKj3sGlmoYTCCgEGD0OQ This is for a Wrangler I think but it might help

 

[FL_Rob]

http://hurst-shifters.com/hurst-shifter/PDF Files/instructionsheets/3910140.pdf
Or try this one ,,I need a tutorial on how to post links

 

[Herz]

thanks, taking a look now.

ahh, after reading it could be a simple fiber gasket that needs replacement. Looks easy enough thank you.