Oshkosh|NNP Truck|NNP Corp|NNP .|. ,|, Oshkosh|NNP ,|, Wis|NNP .|. ,|, estimated|VBN earnings|NNS for|IN its|PRP$ fourth|JJ quarter|NN ended|VBN Sept|NNP .|. 30|CD fell|VBD 50|CD %|NN to|TO 75|CD %|NN below|IN the|DT year|NN -|- earlier|JJR $4.5|NN million|CD ,|, or|CC 51|CD cents|NNS a|DT share|NN .|. 

The|DT truck|NN maker|NN said|VBD the|DT significant|JJ drop|NN in|IN net|JJ income|NN will|MD result|VB in|IN lower|JJR earnings|NNS for|IN the|DT fiscal|JJ year|NN .|. 
In|IN fiscal|JJ 1988|CD ,|, the|DT company|NN earned|VBD $17.3|NN million|CD ,|, or|CC $1.92|NN a|DT share|NN ,|, on|IN revenue|NN of|IN $352.9|NN million|CD .|. 

Oshkosh|NNP Truck|NNP attributed|VBD the|DT downturn|NN in|IN its|PRP$ earnings|NNS to|TO higher|JJR start|VBG -|- up|RP costs|NNS of|IN its|PRP$ new|JJ chassis|NN division|NN ,|, a|DT softer|JJR motor|NN -|- home|NN market|NN and|CC higher|JJR administrative|JJ costs|NNS of|IN compliance|NN with|IN government|NN contractor|NN regulations|NNS .|. 

The|DT company|NN said|VBD it|PRP is|VBZ in|IN the|DT process|NN of|IN phasing|VBG out|RP John|NNP Deere|NNP ,|, its|PRP$ current|JJ source|NN of|IN production|NN for|IN midsized|JJ motor|NN home|NN chassis|NN .|. 
In|IN anticipation|NN of|IN the|DT start|VBG -|- up|RP of|IN its|PRP$ new|JJ factory|NN ,|, the|DT company|NN said|VBD a|DT larger|JJR -|- than|IN -|- normal|JJ chassis|NN supply|NN has|VBZ been|VBN built|VBN to|TO carry|VB it|PRP through|IN the|DT transition|NN period|NN .|. 

