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engine or tranny?

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lately my blazer has been actin up like crazy...when i slow to a stop or start to take off (so between 0-20 mph) it will sometimes shake like crazy, and sometimes its fine...i know i need a new engine due to the fact that my #8 and #6 cylinders are both bad...today after making my paycheck run, i was on my way home and it felt like it had no power all the way home...then when i turned on to a road 2 miles from my house, i lost all power to my rear wheels, i have NO idea what the hecks up with it /forums/images/graemlins/dunno.gif...ive only been doing stuff with trucks for about 2 years, so im completely clueless, so any help or ideas will be greatly appreciated
 

heavy4x4

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Sounds like tranny to me...more specifically, sounds like the torque converter is going bad. /forums/images/graemlins/dunno.gif
 

spac30dyss3y

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i agree with the torque converter problem as well. my blazer would shift into 2nd gear and then vibrate badly, like "letting the clutch in after shifting from 2 to 5 in a standard tranny"... found out today that a microswitch in my 700r4 burned out and it was causing the problem... luckily it's not the torque converter itself for me, just the switch, everythings mechanically okay... so check that out...
 
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ive been paying more attention to when it starts shaking to try to give you guys some more feedback to find out whats up with it...and it starts doing that when i drive it for more than 30 minutes at a time, like it gets heated up and then starts doing that...but when i drive it from home to school, its fine (10 minute drive)...still think its the torque converter? TH350 for a reminder...and if it is the torque converter, should i lay down some extra cash for a higher rpm stall or just go with the cheapest replacement?
 

DieselBurb

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It could also be the clutch plates chattering when the oil gets hot. FWIW, if it's the torque converter going bad, you don't really want to just replace the converter...you'll want to have the tranny rebuilt (personal experience and things that go boom /forums/images/graemlins/yikes.gif /forums/images/graemlins/angryfire.gif). When the converter goes bad, it sends millions of tiny metal pieces through the arteries of your tranny and they can clog the valve body causing a multitude of problems.
 
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