I know from being on here for 5 years that there are some transmission experts out there and I need your help please . My S10 has an 700R4 thats got a lot of miles on her . When putting it into drive and reverse it is making a " clank " sound but not every time and the truck has a low speed vibration as well . I'm thinking the vibration is transmission related . I change the fluid once a year . I've replaced the motor mounts , trans mount and recently had the front end checked out , so the vibrations not coming from there . What are your thoughts guys ? Thanks
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700R4 problems
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one more try. I've seen this once. The ring and pinion so worn that there is alot of slop or play in it. Take the shaft loose from the axle and run a pipe through the u-bolts, then have someone turn the axles back and forth. If not that then I think your right, it[s the trans. You'll need one of those experts to pipe up. Good luck.Previously HoosierL98GTA
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I would set the parking brake, put trans in neutral, grab the driveshaft and see how much it turns just to double check. Sounds like that can travel right up the driveshaft and sound like they're coming from the trans. I've had the spider gear cross shaft wear the hole in the carrier into a slot on those rearends and it makes a hell of a clank when you put it in gear.
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