Question does anybody know why I would have a drilled hole in the bottom of the case?
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Describe it better.
Where? How big? Threaded and plugged?
PICTURE!
drain for a leaky seal?
Originally Posted by Gordon Nichols - Massachusetts 1993 CMC:
Describe it better.
Where? How big? Threaded and plugged?
PICTURE!
1/4" Dia., Threaded, bottom of Case.
I had a tapped hole in the bell housing of a Landrover Discovery. It was unplugged but was stated as requiring to be plugged if you went through mud/water (off-roading) It started to leak oil - a sign of the main crank stuffing box seal leaking - big job. I bought a plug and traded the car for a Mitsubishi 4x4.
Originally Posted by srblower:
I had a tapped hole in the bell housing of a Landrover Discovery. It was unplugged but was stated as requiring to be plugged if you went through mud/water (off-roading) It started to leak oil - a sign of the main crank stuffing box seal leaking - big job. I bought a plug and traded the car for a Mitsubishi 4x4.
srblower;
I have not noticed any oil leaking from this porthole in my trans. case, however I do think the thing to do for now is to plug the hole and check later by removing the plug to see if any fluid escapes through it.
Thanks for your response
Sully
Wonder if it held (supported) a trailer hitch or some sway bar? Post picture so we can see where it is.
Rick: I think I have a credible answer for you. I was under Al Gallo's car yesterday, and looking up at the transmission I found what looks like a 1/4" bolt at the front of the gear carrier, right at the bottom. The gear carrier is the mid-section of the transmission - there are three main sections starting from the rear: The largest being the differential housing, the next one going forward is the gear carrier housing and the last at the front is the gearshift housing (often called a nosecone). The bolt or hole I think you see should be at the front of the gear carrier, about an inch behind the seam where it meets the nosecone.
On pre-1973 transmissions, there was a dimple (positioning) hole on the side of the pinion shaft needle bearing. When the needle bearing was assembled to the gear carrier case, a pin-nosed bolt was inserted into that hole you see on the bottom of the case and, when tightened, protruded into the dimple on the needle bearing, holding it in place.
On 1973 and later transmissions, that dimple/bolt was eliminated and the needle bearing was held in place by a shoulder on the gear carrier and two projections in the gearshift housing. If your transmission was assembled with the later gearshift housing and gear carrier, that bolt would not be installed (and it shouldn't leak transmission oil, either).
Took a while of digging through a couple of service manuals, but I finally found this in my Bentley manual for 1970-1979.
If you wish, you could get a suitable metric bolt (I suspect that it's a 6mm X 1.25 pitch by 30mm long I would guess, but no way am I sure of that) and just screw it into the hole to make everything look "finished". My manual also shows a wavy lock washer on that bolt to hold it in place.
Hope this helps.
Gordon