Question about 1996 Chevrolet Blazer

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Hello, on my Blazer '96: Oil from the gearbox is leaking from the top of the engine (from a kind of pressure release valve close to the dipstick )

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  • Chevrolet Master
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If its the front or rear carriar thats not that unusely. These use 80 90 weight oil and it tends to expand a lot usely when the weather is hot this is why they have vents in the cases to prevent the seals from leaking if the pressure were to build up to high. The transfer case is differant thats behind the automatic transmission and that uses ATF fluid that is also vented but normaly dosn't leak fluid. I guess it depends on how much its leaking and if it has been services lately it may have been over filled its better that its leaking at the vent then the seals. If its close to the dipstick its the front carriar witch is the 80 90 oil its cool where i am how hot is it where you are. If its not giveing you a problem or makeing noise just keep an eye on it for now.

Posted on Dec 30, 2010

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1 Answer

Oil dipstick pops out


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When ever i first start my blazer up i can hear tapping on my motor then it fades away do you know what it can be?


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May 29, 2010 | 2000 Chevrolet Blazer

1 Answer

Leaking from the back seal may be overfilled top of the dipstick


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Jan 12, 2010 | 2002 Audi A4

1 Answer

Change transmision oil


You don't say if it's auto or stick shift. So-

Auto. Start the engine until warm. Drive vehicle onto ramps, SECURE IT! front up, turn engine off. With engine warm, at the back of the gearbox is a drain plug (we'll deal with that first) Remove the plug and drain all oil out of the gearbox. On the bottom of an auto box there is a plate, if it is easily accessable remove the plate, taking care not to split the seal, Wipe off as much of the reidue as possible, then using a releasing oil, somthing like WD40, spray the inside of the plate and it disolves the final bit of gunk. Replace the plate, the plug, Wipe some clean oil on ALL surfaces that are touching, seals etc, and tighten. Under the hood is a dipstick, by the bulkhead, for the gearbox. Remove the dipstick, and with a funnel through the dipstick pipe, top up the gearbox with the CORRECT OIL until it touches the bottom of the stick, Start the engine and slowly, let the car run off the ramps. With the engine running, wait until up to temp, check your level again, it will have dropped, don't panic, then top up the same way until the oil is between the two marks on the dipstick.

NOW

Stick shift. the same as above up until I mention the plate. There isn't one! Remove all the oil, refit the plug. On the top of the gearbox, just off centre, is the re-fil nut. With the car on the ramp, refill with oil. The oil should have come with a flexi tube on top of the bottle, if not, use a funnel on a tube that fits into the nut hole on top of the gearbox, making sure you can access it though the engine bay to fill. Get someone to lie under the car so they can see when the oil comes out of the fill hole, that means it's full. Refit the filler plug, and reverse off ramps. There is no dipstick to check on a stick shift, you don't need it.

It sounds like a long job, but it'll take an hour tops!

Let me know how you get on, any further problembs let my know. Dave

Jul 23, 2009 | 2003 Saturn ION

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