99 GMC K 1500 Transmission burning fluid and comeing out blow-by
I have a 99 GMC K1500 with 200k miles. When I bought the truck it had 125k miles on it. I replaced the trans filter and changed the fluid the 2nd day I had it just to make sure it was done. At 165K miles I had the trans flushed. They said the fluid was pretty burnt at that time, but no shifting problems. Now at 200k miles I noticed it sliping and fluid coming out the blow-by. Is it possible a flush and new filter would take care of this? I am wondering if a cooling line could be pluged. Or with this many miles, would I be better off sticking a new Transmission in? Please advise.
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Hey Frank... when was the last time you had the transmission fluid and filter changed?? this is classic GM transmission issues.. If the transmission fluid and filter are not changed every 50K-75K.... and they need a total fluid replacement about 100K - 125K.. they will start to act exactly like what you are describing...I had TWO 1996-2001 GM trucks do this..(I inherited both of them... they were NOT maintained)
the cost to "fix" each was $1200.00+.. after that.. they ran great...
Find a QUALIFIED Professional to do this...I went to the local drag strip.. asked around to see who was the best automatic transmission man.. (drag racers know this sort of thing!!) GLAD I DID!!!
CarGurusApr 7, 2013 - I need to find out what transmission is in a 1999 gmc sierra 1500 pick up 4x4 extended cab. ... Good luck. if the transmission is bad and you KNOW that for a fact, just go ahead and pull it ... My trans went out yesterday and I found one and wantto make sure it fits before I buy it. ... Used GMC Yukon Denali".
CarGurusAug 15, 2014 - Is the transmission in a 1999 gmc yukon and a 2000 Yukon Denali the same. ... Does anyone know where I can get a fairly cheap used motor from in or ...Need a good fairly cheap motor for my 99 Gmc Yukon Denali 5.7L V8.
You are correct to be concerned. Look and see if the transmission has any vacuum lines. If it does, check the lines by disconnecting them and see if transmission fluid is inside the lines. If there is transmission fluid present, the engine is drawing the fluid out of the transmission and burning it in the combustion chambers.
Radiator overflow- Check color of antifreeze in overflow tank. The radiator can have 2 chambers. If the chambers breach, the fluids can mix. Since the overflow can vent the excess fluids, it can provide an outlet for the trans fluid. Leaks, most common. There should be staining and presence of oily residue. Check for lower cooling coil assembly. Some Makers use a separate cooling unit similar to a steering cooler if a 2 chamber radiator is not equipped. You may be able to simply go to a quick change oil shop and drive over their service bay. They could check for leaks.
you should have it flushed only at 40k miles.some dealers will say every 30k miles....but it should not be changed until 125k miles....the fluid is very expensive...35 dollars a quart...but up to this point just flush the fluid which will clean it for reuse...
5 QUARTS FOR FLUID FILTER CHANGE. IF REPLACING TORQUE CONVERTER OR TRANSMISSION OVER HAUL. YOU NEED 13.8 QUARTS. WHEN YOU CHANGE FLUID AND FILTER.BESURE YOU HAVE TRANSMISSION FLUID LEVEL TO THE FULL MARK BEFORE DRIVING VECHICLE.LET ENGINE IDLE UNTIL GET WARM BUT CHECK TRANSMISSION FLUID WHILE ENGINE IDLING.IF FLUID LEVEL DROP A LITTLE ADD A LITTLE MORE TO GET FLUID LEVEL AT FULL MARK.ONCE ENGINE GET OPERATING TEMPERATURE.SHIFT TRANSMISSION THROUGH ALL GEARS TWICE ONE AT A TIME.CHECK TRANSMISSION FLUID LEVEL.SHOULD BE ON FULL MARK.DRIVE VECHICLE FEW MILES CHECK FLUID LEVEL.IF FLUID LEVEL.FULL YOU GOOD.IF STILL LOW ADD A PINT AT A TIME.ONCE FLUID LEVEL CORRECT. SHIFTING OKAY TIME PLAY.YOU GOOD TO GO.
rec check fluid first. If trans fluid hasn't been changed in last 30,000 miles change fluid, filter and pan gasket. At that time inspect for foreign materials in bottom of pan or on magnet if you have one. If truck has over 100K and fluid was never changed you may have more problems if changing the fluid.
sounds like the transmission might be low of fluid check it out if that does not help check transmission linkage is loose if not looks like the tranny burned out same thing happen to my suburban the tranny gave up completele
It sounds like your low on fluid, or your transmission filter is dirty and the front pump is not getting enough oil supply. Worst is your front pump is going bad.
Check the fluid level and see if it's burnt. Good luck
follow maintaince suggestions. it's over kill but you should never have a problem if you do. I have a 99 gmc truck with 156000 and i've only changed tranni fluid once about 30000 ago. runs like a top. i don't abuse my vechile, so as long as you don't abuse and follow suggestions, it should outlast you. what i do, is i look at the fluid, when it turns a dark red and or get's a burning odor to it, deffinatly time to change fluid. try to do it BEFORE it get's that bad.