View Full Version : Leaky Muncie- From Trans mount bolts???


jsouthco68camaro
Aug 24th, 07, 06:22 PM
I am trying to find a leak on my muncie. We just installed it about 2 weeks ago and we have a steady leak. From what i can see the most evidence of fluid is right at the trans mount / shifter bolts...

Is this possible that it could be leaking from these bolts???

Please help- This is driving me nuts!!!:confused:

X33D80
Aug 24th, 07, 06:42 PM
A lot of them leak from a shaft that can be seen on the front of the tranny under the input shaft, mine included. I too wish to know how to stop the leak.

gn69z28
Aug 24th, 07, 06:59 PM
concerning the leak at the front of trans at cluster gear shaft,this is what I did.clean front of trans and bellhousing with brakeclean and put RTV silicon on the trans at the cluster shaft then install trans before silicon hardens.when it hardens,it seals the area and no more leak at front of trans.worked great for me on my Muncie.as for the leak near the rear mount,look at the speedometer gear.hope this helps.

hereitis67
Aug 24th, 07, 07:02 PM
for x33. dont park the front car downward. it may be coming from the front hole. the muncies dont have a front seal so you park it on a incline towards the front fluid goes there and comes out of hole on bearing retainer.

dbx1969
Aug 24th, 07, 07:07 PM
for x33. dont park the front car downward. it may be coming from the front hole. the muncies dont have a front seal so you park it on a incline towards the front fluid goes there and comes out of hole on bearing retainer.

It never ceases to amaze me....all these idiosyncrasies these cars have. I wouldn't have that ^ BS. The car? yeah:)....the tranny? No.:mad:

hereitis67
Aug 24th, 07, 07:09 PM
for jsouth. do you got a tranny mounted or cross member mounted shifter. if it is cross member mounted. back hole goes into tail housing.if tranny mounted shifter clean it up and also may be reverse linkage seal. or between the case halves. is it after sitting or running car. got to pinpoint leak. clean it up with brakeclean and try to see where leaking.

X33D80
Aug 24th, 07, 07:19 PM
My car is parked on the level floor of the garage and probably drips a drop or two per week. I think it is only after I drive it and if it sits for a few weeks the dripping stops. The next time I have the tranny out I'll try the silicone trick.

rod67ss
Aug 24th, 07, 09:17 PM
Even if all gaskets seals etc. are perfect Muncies may still leak through the metal case. Something to do with the quality of the casting metal will allow sepage.
I read that some rebuilders paint the inside of the case to fix the issue.

jsouthco68camaro
Aug 24th, 07, 09:59 PM
My shifter attaches to trans from the bottom, bolts run up through the piece between the tranny and cross member.I pulled it apart and ran silicone in the threads, but now when I went back to put the cross member back in it doesnt want to line up right.. (It never stops:noway:)... And now the bolts that connect the cross member to the fixture (What is this thing called? between the trans and cross member,) are stripped or cage nuts have broken loose....

So...2 new questions,,
1) what is this Piece called so i can get a new one??
2) could I have put it on backward,(Or does it even matter) causing the holes to not line up right when the cross member was put back on?

Farm Boy
Aug 25th, 07, 01:09 AM
jsouthco68camaro - Your leak could be coming from the reverse shift shaft boss on the side of the tailhousing. The reverse shift shaft is held in place by a tapered pin that installs from the top down. If someone has tried to drive the pin down to remove it, or just used to much force to install it, the tailhousing can crack and leak. It can also leak from the lower pin hole.

X33D80 – The counter gear shaft will only leak when there is too much clearance between the shaft and the hole in the front of the case. The front of the shaft is slightly tapered and should fit (and seal) really tight in the hole. Years of hard first gear take offs will cause the hole in the front of the case to deform allowing the shaft to get slightly loose.

The input gear is constantly trying to push the counter gear out the bottom of the case. If the shaft has any movement it will egg shape the counter shaft hole in the aluminum case. Using sealant on a loose shaft will only provide a temporary solution to the problem. For a permanent fix you will need to either replace the case or have a Muncie specialist repair your case by drilling the hole in the front of the case oversize, and install a bushing to restore the hole to the correct dimensions. This will fix the leak and keep your gears in proper alignment.

X33D80
Aug 25th, 07, 03:52 AM
Thanks Farm Boy. Since my leak really is minimal I am not going to rip everything apart now. But the next time the tranny is out I can get that front hole repaired.