jeepman 87 Posted January 6, 2012 Share Posted January 6, 2012 I have an 87 mj 4.0 4x4 danna 44 metric ton, just wanted to know what gear would be in it no plate Link to comment Share on other sites More sharing options...
mvusse Posted January 6, 2012 Share Posted January 6, 2012 I have an 87 mj 4.0 4x4 danna 44 metric ton, just wanted to know what gear would be in it no plate 4.0/5 speed stick should have 3.07. 4.0/4 speed automatic should have 3.55. But to be sure you'd have to remove the diff cover and read the stampings in the edge of the ring gear. Link to comment Share on other sites More sharing options...
jeepman 87 Posted January 6, 2012 Author Share Posted January 6, 2012 Forgot, it's also an auto tranny Link to comment Share on other sites More sharing options...
carnuck Posted January 13, 2012 Share Posted January 13, 2012 Is the tag missing from the front diff? Link to comment Share on other sites More sharing options...
mvusse Posted January 13, 2012 Share Posted January 13, 2012 If the tag is there, it may not help much. It may be too rusted to read, and even if you can read it chances are the axle was regeared and the original tag put back on. Link to comment Share on other sites More sharing options...
adam518 Posted January 14, 2012 Share Posted January 14, 2012 Do you know if your rear diff is open or has a limited slip? If it is limited slip, jack the rear end up...both tires...and shift trans into neutral. Put a grease mark on driveshaft and also one on the inside of either rear tire at the 6 o'clock position. Now, spin the driveshaft and count the number of driveshaft turns it requires to turn the tire one full revolution. Stock gearing will be far enough apart that it should be easy to tell. A tad over 3 turns would be 3.07, right past 3 1/2 turns will be 3.55, slightly past 4 turns would be 4.10, etc. If your diff is open, jack up one rear tire. Do the same thing but you will have to multiply the number of driveshaft revolutions by two to get the gearing. In an open diff, the ring gear spins at he average of the two wheels. In a straight line, both rear tires are turning at the same speed as the ring gear...lh tire spinning at 100 prm plus rh tire spinning at 100 rpm equals average speed of ring gear at 100 rpm. If you force one tire to stop, the turning tire will spin at twice the speed of the ring gear. So, one tire on the ground with the ring gear still tuning 100 rpm would force the tire in the air to turn 200 rpm. So the average of zero rpm plus 200 rpm would still equal a ring gear speed of 100 rpm. Therefore, right at 1.5 turns would be a 3.07 and 1.75 turns would be a 5.55, as long as one tire was completely stationary. Link to comment Share on other sites More sharing options...
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