Subject: Re: 700R4-4L60 Build Up Part 2 by T-mo on 2011/4/25 21:13:13
Quote:
PeteK wrote:
Thanks JD. When I am done, they really are remanufactured, rather than rebuilt. Every piece I use must be new, equal to new, or restored to new. It is critical to do all bushings to maintain oil pressure and volume throughout the box. As you get closer to the center of the trans, they wear less. If the bore guage indicates less than .001 of new, I will make an exception and reuse it. Unlike an engine, the trans bushings are not manufactured to the same tight standards. Occasionally, a new bushing will come in slightly looser than a used bushing. Anyhow, blueprinting is key.
One thing I have noticed in the ATSG manual is a lack of specs for some of things you have mentioned above. I use to work in the helicopter indistry and what I mean by this is there is not a lot of given measurments for when something is servicable (range and/or recommended/target measurment) or when it should be discarded/shimmed/etc. I've noticed you have supplied some (eg; total servo cover movement, range: .080"-.100", target: .090"). Where can I find specs for bushings, bores, shaft diameters, etc? This is done on engines but is it necessary for transmissions aswell, am I getting too carried away? I've also noticed with clutch stack ups (for example) there is a range given .040"-.063", do you try to go on the tight side, loose side, right in the middle or if it's in the range it's "good enough".
