HELP!!! 915 tranny question
02-24-2002, 10:08 PM
#1
Racer
Thread Starter
HELP!!! 915 tranny question
Went to change the gear oil this weekend in my 81 SC (915 tranny) and could not get the bottom drain plug off (17mm allen). Had a couple of guys much stronger than me give it a try - using extension bars on wrench etc etc - and still no movement.Called it quits because concerned about rounding off the plug. Other than welding an allen wrench into the drain plug, does anyone have any suggestions as to how to break this plug loose? Thanks in advance!
02-24-2002, 11:45 PM
#2
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I'm not a pro but here goes...
You might try the following: 1. Spray some penetrating oil onto the lug. Do this a few times and give it time to do it's thing. 2. Try heating the tranny case around the plug and not the plug itself. Heating with open flame is probably a bad idea so maybe a wallpaper heating gun or one of those shrink wrap guns which direct heat well. 3. Cool the plug itself with an ice cube or spraying with aresol coolant. Hopefully this combination will free the plug. Sounds like alot of work. I'm sure someone else has a better idea. Good luck!
You might try the following: 1. Spray some penetrating oil onto the lug. Do this a few times and give it time to do it's thing. 2. Try heating the tranny case around the plug and not the plug itself. Heating with open flame is probably a bad idea so maybe a wallpaper heating gun or one of those shrink wrap guns which direct heat well. 3. Cool the plug itself with an ice cube or spraying with aresol coolant. Hopefully this combination will free the plug. Sounds like alot of work. I'm sure someone else has a better idea. Good luck!
02-24-2002, 11:49 PM
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Another thought is to evacuate the tranny oil out of the fill hole. I am assuming you have tried to remove this already. If you have not, forget the project until you've loosened the fill plug located half way up the side. Anyway, I don't think it is a big deal to draw the oil tranny oil out from the fill hole. A drill pump or good syphon should do it. Then refill conventionally. I did my '86 tranny last fall and will warn you in advance that this is one messy and stinky job. Make sure you have the right syphoning, pumping and collection products.
<img src="graemlins/c.gif" border="0" alt="[ouch]" />
<img src="graemlins/c.gif" border="0" alt="[ouch]" />
02-25-2002, 12:03 AM
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I just changed mine. I'll put a "plug" in for SWEPCO. My 915 tranny shifs remarkably better. Most notable, the ever present problem of getting it into first on a roll.
02-25-2002, 03:00 AM
#5
Race Car
As a motherly side note: be sure you can open the fill plug before you finally get the drain one open. You'd hate to discover you can empty the box just moments before you learn you can't refill it.
