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Re: Allen/ 4L80E problem, kind of long-winded
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Posted by Allan In NE on June 16, 2006 at 09:30:32 from (148.78.243.26):
In Reply to: Re: Allen/ 4L80E problem, kind of long-winded posted by buickanddeere on June 16, 2006 at 08:09:45:
Your "Bright Lights" doesn't know what he's talking about. All GM transmissions run a line pressure of roughly 63 lbs in neutral, park and all forward gears with 120 lbs being applied in reverse because of the double reduction of that gear. No exceptions. Oil pressure of electronic versions of any given transmission are computer controlled with a stepping motor. Change that pressure any substantial amount and it upsets the whole apple cart as far as shifting/feel is concerned. If the line pressure was reading low, the transmission either had a plugged filter, a bad pump (which I doubt) or more than likely a blown seal, plain and simple, which is typical of GM lip-seal design. Further, pull-thru on a clutch pack is very, very easy with high output engines even tho the build is correct. They just were not designed to tow, period. Ever. I don't care what the salesman says. GM finally realized this and went to the Allison. Now that, boys and girls, is a transmission. :>) Allan
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