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700r4 no forward gears just reversebtcamaro 12-25-2006, 12:09 AM I rebuilt my trans in my truck and everything seemed fine for the first 30-40 miles and then I lost all forward gears. It is like it is in nuetral except when it is in reverse. What do you guys think I did wrong or what should I look for. 12SCNDZ 12-25-2006, 10:46 AM It won't move forward in any manual ranges, either? Frank CPT btcamaro 12-26-2006, 02:22 PM nope. It is like it is in nuetral all the time except in reverse Performabuilt 12-26-2006, 09:52 PM With no forward gears in any position you aparently have a major failure in the input drum and would have to have damage to both the forward and overun clutches ,You will need to remove the trans and tear it back down to find out why if you need any thing just yell , 12SCNDZ 12-26-2006, 11:01 PM The splines in the front planetary are stripped or the splined section has broken off the front planet completely, could be one cause. bad stator bushings that have caused a problem in the sealing rings on the input shat, could be another. Neither the forward or over-run clutches are holding, or not tranferring power. Frank CPT Performabuilt 12-27-2006, 12:16 AM cool pretty close to what I said but with a bit more detail lol btcamaro 12-28-2006, 09:49 AM I found what went wrong. I rolled the lip seal on the 3-4 piston by accident causing the seal to tear and get no pressure. The seal that tore ended up getting jammed into the 3-4 clutch pack and burned them up. Thanks for the replies. It sucks that I had to start over but I guess you live and learn. Performabuilt 12-28-2006, 10:51 AM well good luck this time if you need any information please dont hesiate to give us a call or yahoo message us we are performabuilt on yahoo messenger 12SCNDZ 12-28-2006, 12:36 PM I found what went wrong. I rolled the lip seal on the 3-4 piston by accident causing the seal to tear and get no pressure. The seal that tore ended up getting jammed into the 3-4 clutch pack and burned them up. Thanks for the replies. It sucks that I had to start over but I guess you live and learn. A cut 3-4 piston lip seal won't cause a no forward condition. Are you sure it wasn't the forward or over-run piston? Frank CPT btcamaro 12-28-2006, 09:13 PM It was the overrun piston I wasn't thinking strait I was up late pulling the trans out and apart | ||