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Originally Posted by bluex
Mine was the same, I got right under 13 running mine right after the rebuild with the 3.08's. It was running about 1300 locked up at 60. It would downshift sometimes to 2nd for even a tiny hill. I've just got it back somewhat reliable so I dont have a number for switching to the 3.73, it does run right at 2k @ 60 (I think speedo is waaay off) so hopefully that takes care of all the downshifting and will result in better milage. This is with a 275/60/15 rear tire.
86--if you swap to the T350 make sure to get a 9" tailshaft version and you wont have to mod the DS. You will have to move the crossmember forward (towards the engine) about 2" or so. If your lucky the holes will already be in the frame.  |
I'm running 295/50/15 for rear tires on on my truck.