Hi Al, I didn't not know that the 674 came without difflock. We had 674 in the 1980s and it had diff lock. My brother has 454,495,684,3230 all from the same IH series and they all have diff lock. So does it have hole in the side of trans/diff case for diff lock control rod to go thru? I don't know the answer but looking at CaseIH parts you probably have to remove the whole hydraulic housing off the top of diff to install diff lock.
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Today's Featured Article - Women and Tractors - More Views From the Farmer's Wife - by Teri Burkholder. The top ten reasons why the judges wouldn't let you participate in the stock antique tractor pull: Hey, this is stock! It came with that V8 in it! That "R" on my tires stands for "really old" not radial! Blue gas? We thought it was a pretty color! What wire hooked to my throttle?
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