Question about 1999 GMC Suburban

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I HAVE A 99 CHEVY SUBURBAN. IM TRYING TO CHANGE OUT THE TRANNY WITH A REBUILT ONE. HOW DO I GET THE TOP 4 BOLTS OFF. IF U HAVE ANY IDEA I WOULD LIKE TO KNOW IM NOT HAVING MUCH LUCK. IM ALSO DOING THIS ON THE FLOOR OF MY GARAGE. THANKS IF ANYONE CAN HELP ME.

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Either, from in the engine well using a 14mm wrench box end on the bolt, with another wrench on the 14mm wrench, to get more leverage to break it loose, or from underneath, using a very long extension and a 14mm swivel socket, I would wrap some electrical tape around the swivel socket to keep it from flopping around.

Posted on May 09, 2010

Testimonial: "I WAS WONDERING IF I NEEDED TO LOWER THE TRANMISSION AND PULL THE CROSSMEMBER. I DIDNT WANT TRY IT AND BE WRONG SO THANKS FOR THE HELP. "

  • James Milzheimer
    James Milzheimer May 09, 2010

    What I was trying to explain with the wrenches is putting the box end of a wrench on the bolt, then taking the box end of another wrench and putting it on the one part of the open end wrench that's on the bolt to give you more leverage to get those bolts loose. I just did a motor in a 98 Suburban and those bolts are socked in there tight. Not much room, and alot of stuff in the way. You might try putting a jack under the transmission and removing the transmission crossmember and lowering the transmission down some, to those bolts from underneath. Becareful not to lower it too far, because of the distributor and oil pressure sending unit at the back of the motor.

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