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GT6 GT6 Diff Question

DaveGT6

Member
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I'm getting things ready to replace the pinion seal in my '70 GT6's differential. I get the back end up and get underneath to drain the diff --- no drain plug. Theres a fill plug on the side of the rear casing but not a thing on the bottom of the nose piece casing or the rear casing! Granted, at this point the whole diff is covered in crud and if there's a female threaded plug insted of a male threaded plug I could have over-looked it. (Cleaning is this mornings project.) But I just checked the shop manual before I fired up the 'puter; the pic in it does not show a drain plug. If there's no drain plug I really don't want to flip the chassis on it's side to drain the gear oil. Anybody have a tried & true solution?
 
Plews and other grease gun mfgrs. sell a product for sucking the gear lube out of housings of this design, Oddly enough they call it a suction gun.Plews Part # 30-118 or Lincoln # G150.
 
Dave, the best solution is to tap and drill a drain hole and fit a common sized plug in it. Easy to do, even if you have to go out and buy a tap & die set.

Gotta ensure that all the swarf comes out of the diff casing, can't leave any in there to muck up your gears.

I hope this helps, let us know . . . :thumbsup:
 
Be sure to use a seal puller... don't be tempted to use a screwdriver or you could be in danger of scoring the wall. It takes some work to get the seal out.
 
Thanks all. Completely forgot about suction guns. I think I'll go that route. If I ever need to remove the diff I'll drill it using the drill press & tap it for a drain plug.
I hope everyone had a great Christmas and wish all a happy (and SAFE) New Year!
 
I used an air compressor and rubber tube to get most of the oil out. I just shoved the tube in, angling it down, and they used a shop rag to create a seal between the remaining hole and the air gun. Worked well enough to get most of the oil out.
 
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