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Car Forum / Pontiac / Pontiac Firebird / February 2004Any tips for protecting yourself in tranny rebuilds ?
The overdrive on my '84 Z28 is gone and first gear is beginning to slip in automatic. So it's time to get it rebuilt. I know the tranny is a 700R4, and engine is a 5 liter, 305. Does anyone know what kind of torque converter comes with this ? I've heard of terms like "lock up", but I'm not sure what that means. Are there any markings that can be seen from underneath to make sure the installer puts in the right one ? Thanks. The installer will put the right one in, I don't think they would risk having to do the same job more than once.....free of charge. > The overdrive on my '84 Z28 is gone and first gear is beginning to slip in > automatic. So it's time to get it rebuilt. I know the tranny is a 700R4, [quoted text clipped - 3 lines] > underneath to make sure the installer puts in the right one ? > Thanks. There is really only one Torque Converter that can go in to a TH700R4 properly. That is a TH700R4 converter. They used those transmissions in Trucks, Vans, F-Bodies, and Corvettes. Most rebuilders will put in a rebuilt converter as well. Thus the factory external marking will do you no good. All TH700R4's have a Lock Up Torque Converter. This locks the Impeller at certain engine load conditions for more fuel economy. As for the External Transmission Case, if they put the wrong one in some how, it will not mount properly. I have yet to see this done. For protection, Go to a few local mechanics (atleast 6 or 7) and ask them who they have rebuild their transmissions. Then call those places and see what it will cost to have done. Avoid places like AMMCO. Charles > The overdrive on my '84 Z28 is gone and first gear is beginning to slip in > automatic. So it's time to get it rebuilt. I know the tranny is a 700R4, [quoted text clipped - 3 lines] > underneath to make sure the installer puts in the right one ? > Thanks. Guy, Check this out before you get your transmission rebuilt. I wish I had seen it before my tranny got rebuilt. http://www.transmissioncenter.net/700R4.htm -Bruce >Subject: Any tips for protecting yourself in tranny rebuilds ? >From: "Guy" Guys@accesstoledo.com [quoted text clipped - 8 lines] >underneath to make sure the installer puts in the right one ? >Thanks. If the numbers matching case isn't a concern, buy a Delco remanufactured unit and have it installed or do it yourself. Should be ready to go. In this fashion, you'll get all the upgrades that have been done to the 700R4 since its beginning. The early 700R4's (1988 and older) are prone to pump failure. 1989 and newer had revised, improved pumps. Joe--ASE Certified Parts Specialist & 10th Ann.Club Tech Director '80 Carousel Red Turbo T/A, 26k orig. '79 "Y89" 400/4 speed 10th Ann. T/A, 57k orig '84 Olds 88 Royale Bgm 2 dr, 307 "Rocket" (lol), 141k and still going.... '80 T/A project car... |
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