Question about 1996 GMC Sonoma

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I have a broken vacuum line coming from the transfer case, and it is leaking trans fluid, i actully didnt know i had a problem till i saw the smoke on the freeway, lol,,,and other than the obvious repair of the line, is there any thing else wrong, like maybe the switch on the t/c is bad? how to test it? the 4x4 worked great just a few wks ago, when i accidently bumped the button, anyways ,thanks 4 any input!!

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If you are sure it is a vacuum line, Any oil in that line indicate the controlled componant is defective. A vacuum diaphram etc.

Posted on Jul 14, 2009

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Whats happening is the modulator diaphram on the tranny is leaking and the tranny fluid is being siphoned into the engine, Replace the modulator and check the tranny level.

Posted on Jul 14, 2009

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1 Answer

97 GMC Jim 4x4 oil leak not noticeable from top for sides of eng can't c where its coming from underneath either u told me it could b r c gasket where is that located on eng v6 no knocking from eng


is it an oil leak or other fluid --under engine you have the oil filter - power steering lines-transmission pan ,lines -transfer case -front c/v axles and center ham -coolant-brake fluid-and gas all these lines are at the back of the trucks engine you need to look at whats wet and where to pin point a fluid leak best is by color trans-power steering usually redish --oil, transfer,axle,blackish ---coolant green or red --brake, tan

Aug 16, 2016 | GMC Cars & Trucks

1 Answer

4 Wheel drive (Manual trans) not engaging


First, IF your vehicle has a true manual-engage for the 4-wheel drive, then you either have a linkage that needs adjusted, or there is a problem inside the transfer-case (ie- broken shift-lever, broken chain, or loose gear, depending on which metod of drive it has (they WERE gear-to-gear, in my 1981 Isuzu, which means no chain to break...)
OR- if your vehicle has the same system of activation on the 4-wheel drive, as the Chevrolets of that era (Isuzu and Chevrolet were together and may still be), it's probably a vacuum problem. See, there is a vacuum-pot that pulls the cable to actuate (lock-in) the front-axle, using vacuum from a line on the transfer-case (vacuum that comes from the engine). IF there is a hole in any of the lines &/or if the vacuum-pot itself has a hole in it, then your 4-wheel drive linkage (on the front-axle) WON'T be pulled-in, so it won't engage, at all. This happened to me in my 2000 ZR2 during a snow-storm! It clicked, but wouldn't engage.
Go online or get a reference-manual from Oreilly's, Autozone, etc. to see how your system is actually actuated.
If it is manually actuated, then look for a linkage or a line that needs adjusted (HOPE it's not inside the case!) or IF it is vacuum actuated, then you can test it by starting the engine and spraying all the lines and the vacuum-pot with WD40 or other aerosol, to see if the engine revs- which will tell you where the problem (leak) is.
Either way, GOOD luck!

Dec 21, 2013 | 1997 Isuzu Rodeo

1 Answer

Bellhousing leak


did you just have the fluid replaced in the transfer case?? if the answer is no, the you may have a leak from the series of seals that are internal. you will have to have the transfer case removed and have the CVT seal replaced and other seals inside of the transfer case. lengthy repair and costly also. the transfer case has to be removed to replace the CVT side seal and while you are in there replace seals inside of the transfer case also. that what its sounds like to me. transfer case seal leak or the inside CVT seal leak. however if its leaking right from the bellhousing, it also could be the torque converter seal. this is when proper diagnosis comes to play. if its d converter seal, than the trans has to come out. have this one checked by someone that knows what they are doing. could be transfer case seal leak and it could be converter leak.

Jul 12, 2013 | 2003 Nissan Murano

2 Answers

Noise coming from the transfercase near the transmissionand leaking fluid between the both where they meet up


First I would check your fluid level. There are 2 plugs located on the rear of the transfer case. Remove the top one and verify fluid level. To repair the leak the transfer case will need to be removed and reinstalled with a new gasket.

Verify fluid level first, add if needed and verify that sound goes away. If sound fails to go away you will need to have the transfer case replaced or rebuilt. I think the fluid is Dextron III ATF. Double check with another source before adding fluid.

Jan 12, 2010 | 1999 GMC Suburban

3 Answers

My 1984 chev s10 blazer 4x4 2.8ltr is going thru up to 2-3 quarts of transmission fluid a day. I'm a single mom with little resources please tell me where to look for possible leaks


First, take a look underneath with the engine running (be careful as the exhaust pipe is very hot, and, don't reach up where the fan is). A leak that severe is usually a cooling line (there are two that go from the trans up to the radiator) or from the converter seal (inside the bellhousing where the trans meets the back of the engine) The first isn't too expensive to repair, the second means trans removal and costs a lot.
Also check the transmission itself as the pan gasket or the side linkage seal can also leak.
Once you find the leak, you can decide what to do about it. A leak that large should not be hard to locate. If you see a lot of smoke at the tailpipe, the other way you can loose that much fluid is if the vacuum control on the side of the transmission is bad. then, you won't see anything on the ground but will be burning it in the engine. Only other place you can loose fluid is into the radiator in which case you will need to replace the radiator.
In any case, you will destroy your transmission if you continue to drive it leaking that badly.
I'm hoping that the leak will be in one of the lines.
Good luck!!

Sep 16, 2009 | 1984 Chevrolet Blazer

4 Answers

Engine smokes and burns of oil or something else burning.


if it is the camaro in the pick , they usually leak by the valve cover gaskets, right to the manifolds , that way the smoke and you don;t find the leak because it burns the oil

Aug 02, 2009 | 1997 Pontiac Firebird

2 Answers

Transmission Isues. part 2


THE TAILSHAFT OF A 4x4 TRANS WILL HAVE A LARGE FLANGE THAT A TRANSFER CASE ATTACHES TO.

May 26, 2009 | 2002 Chevrolet TrailBlazer

1 Answer

Transmission fluid loss


The transmission is either going to leak out the front by the engine, or by the halfshafts, or possibly by the shift detent which is unlikely. Check the connections to the radiator - the small lines that go there as one of them can be broken. make sure everything is completely cleaned off and your transmission has fluid in it before you check it. If it is full, it should leak with the engine running in neutral or park. If not, you can always have your foot on the brake and shift into the gears to see if it will leak then. Smoked transmission when out of fluid may mean trans will not work any longer... Hope this helps you, Rick

Apr 29, 2009 | 2002 Dodge Neon

2 Answers

White smoke from tail pipe, Changed rings and head gasket still there.


White smoke or steam? If it's smoke, I bet you have an automatic transmission, trans fluid makes white smoke. There is a vacuum line from the trans to engine somewhere, there is probably a diaphragm that's broken. call your local trans shop it shouldn't be a huge expense to fix.
please leave a fixya rating if I'm correct

Apr 06, 2009 | 1984 Nissan Pickup

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