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I bought some cheap gear oil to do some fills and flushes on my differential.
Cleaning the inside with brake cleaner would eat the seals. (according to forum members)
Once filled with oil, I can also check for leaks (maybe the seals are leaky...).
The diff. is off the car. Where should I pour the fluid in?
Here are two pictures. 1. Can the vent hole on top be used? It is higher and because of that I can add to max level. If yes, how can I remove the plastic cap? 2. Should I use the 'pipe plug' on the RH side to fill it? 3. Should I use 'bolt plug' on the bottom side to fill it?
Pipe plug on the right side
Final level is when it just starts to run out of that hole (car/ diff level of course)
The bolt on the bottom shouldn't go into the housing...
M
PS I would think that varsol would be ok to wash down the insides with, might dislodge some stuff from the sludge that's better left alone but shouldn't hurt any seals. Gary R. should be along and might have better solutions. For the sake of a gasket I'd pull the cover and have alook
M
The square head plug on the right side of the rear cover is the ONLY access you need to have. Some who rebuild the differentials will put a drain plug in the main housing but you need to know what you are doing for that to avoid drill shavings being trapped inside.
I would recommend you heat up the flush lubricant before use.
Back in the day we drained out the old oil and filled the piping plug hole level with automatic transmission fluid to "scrub" the gears and friction discs clean for about 10 minutes...then we thoroughly drained the A/TAX fluid and refilled with the correct differential oil.
Since the diff. Is out of the car, you can use a 1/2" drive electric drill to spin the input yoke I forward and reverse for 10 minutes.(PLEASE CORRECT ME IF THIS IS NO LONGER A GOOD METHOD)
I bought some cheap gear oil to do some fills and flushes on my differential.
Cleaning the inside with brake cleaner would eat the seals. (according to forum members)
Once filled with oil, I can also check for leaks (maybe the seals are leaky...).
The diff. is off the car. Where should I pour the fluid in?
Here are two pictures. 1. Can the vent hole on top be used? It is higher and because of that I can add to max level. If yes, how can I remove the plastic cap? 2. Should I use the 'pipe plug' on the RH side to fill it? 3. Should I use 'bolt plug' on the bottom side to fill it?
2 3
I may be confused by the picture, but this doesn’t look like the bottom of the diff. Looking like the top to me. Please help me, AND Novusuhu with this pic. ???
remove the rear cover. drain gear oil. then fill then housing with diesel fuel and let it soak to remove all the crud. then clean it all out and inspect. put a new gasket on the cover. install and fill with new 80w90 gear oil with the additive and move on
I may be confused by the picture, but this doesn’t look like the bottom of the diff. Looking like the top to me. Please help me, AND Novusuhu with this pic. ???
The following bracket is added with the 4 bolts going into the diff.
remove the rear cover. drain gear oil. then fill then housing with diesel fuel and let it soak to remove all the crud. then clean it all out and inspect. put a new gasket on the cover. install and fill with new 80w90 gear oil with the additive and move on
I may be confused by the picture, but this doesn’t look like the bottom of the diff. Looking like the top to me. Please help me, AND Novusuhu with this pic. ???
Driving69 posted a pic of when the bolt breaks through the diff cover instead of where the 4 bolts that are on the actual diff housing, that might be what's throwing you off
M
warm the shop up for a few days.
lay diff atop a bucket, with Side fill hole at lowest point & perpendicular to floor.
let diff drain into a bucket for a couple days.
Refill diff with good gear oil and proper posi lube.
don't overthink this.
When diff's in vehicle, I've sucked gear oil out with a turkey baster & hose; dedicated manual suction pumps are sold as well.
There are plans on interweb to instruct how to install a bottom drain.
Differential fill & flush
but shouldn't hurt any seals. Gary R. should be along and might have better solutions. For the sake of a gasket I'd pull the cover and have alook
