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Old 12-23-2003, 08:05 AM
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strange 700r4

Help!! I'm not sure what I did wrong. I changed the transmission fluid in my suburban last night (what a mess!) and now my tranny refuses to shift gears. It is a 700r4. It worked fine before I changed the tranny fluid. All help is really appreciated.

Jgil

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Old 12-23-2003, 08:34 AM
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Sound like you didn't seat the tube from the oil filter properly in the front pump. This is easy to do and allows air to be sucked into the pump, thus no shifting. Did you make sure to dig out the old rubber tube seal when you removed the filter? Then did you install a new rubber seal and seat it carefully?
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Old 12-23-2003, 09:03 AM
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I followed the instructions. i pulled the old filter out, and put the new one in. the new filter had two orange bands (looked like o-rings) and it fit inside perfectly
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Old 12-23-2003, 09:14 AM
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Were the o-rings on the old filter too when you removed it? They often stay in the tranny and mess up the new filter seal.
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Old 12-23-2003, 09:44 AM
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Dangit, the old filter is missing it. Ill tear it down and fix it. Would it be ok for me to reuse the filter and/or gasket?
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Old 12-23-2003, 09:50 AM
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Sure. The gaskets are tough so when you dig out the old one, the new one should seal fine. It's just wadded up in there with the old one and allowing air to leak into the pump.
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Old 12-23-2003, 01:56 PM
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Yeah, make sure you check for the old o-rings... the same thing happened to me with my th-400. I was experiencing delayed 1-2 shifts, so I changed the tranny fluid and filter and discovered a split modulator hose, and replaced that too. Put it back together, and the car wouldn't bulge. What a bold feeling. I really had the doo-doo face after that. $1000 and a rebuilt tranny later, and I'm still not satisfied.
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Old 12-23-2003, 05:10 PM
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fluid change

t/v valve stuck in valve body typical try this with engine off, kick gas pedal 6 times fast and hard to the floor. this sometimes works to free up valve
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