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--></style></head><body lang=EN-US link="#467886" vlink="#96607D" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:11.0pt'>The Squarebacks transmission was rebuilt again by an experienced local builder a couple years ago after the west coast builders job ground the input shafts bearing down to a nub.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'>Worked fine and was very happy with it for the first few thousand miles but now it occasionally pops out of 4<sup>th</sup> under moderate acceleration. This Tranny has the Bus 3<sup>rd</sup> and 4<sup>th</sup> gear in it<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'>For the Freeway flier as it did on the first build with no popping issues, but he did change out the 4<sup>th</sup> due to minor damage from the sloppy bearing.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'>Now I know that the old swing trannies would pop out when they wore out but this is IRS, and nothing in there should be worn with less than 10Kmi on it, <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'>So what could it possibly be? I have adjusted the linkage at the shifter (moved the plate forward to make sure its pushed in properly) to no avail, the rest of the linkage<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'>Is good although the guide bushing below the shifter is worn (as they usually are).<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'>One clue may be that if I make note to get it in firmly it hasn’t popped out, and if its in for a mile, its in for 300miles, never pops out after the first mile, so<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'>What is SUPPOSED to hold it in gear? Trannies are a black box for me so Im trying to get a feeling for what could be wrong by understanding how it should work in the first place.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'>Keith<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'><o:p> </o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>