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Old 12-28-2003, 06:44 PM
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Red face Transmission 700R4

I have a 89 Suburban 1500 that the tranny was rebuilt by aamco about 2 years ago. The other day I was driving and heard a big boom like the rear blew, but the forward gears act as if vehicle is in neutral and reverse works fine. No other odd noises. Anybody have clue as to what it could be?

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Old 12-28-2003, 09:52 PM
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700 question

broken gear train components , first guess here(front ring gear)

clutch plates fail most likely wont happen suddenly
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Old 12-29-2003, 06:46 AM
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Gotta agree with airworld.

broken ring gear, shaft , major failure of the forward drum area.

Transfer of Reverse power goes around the drum where the forward drum is located.
Dont worry how old you are... it is the mileage on your body that adds up.
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