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Re: 69 c50
My truck has a Detroit Diesel 4-53T which is governed at 2,500 rpm. The original 5.29 rear topped out at 59 mph. I was targeting gearing it so I could run 70 mph. At 65 mph I am guessing 2,300 (do not have a tach). I purchased the ring gear and pinion from LKQ heavy truck parts. I think it cost me around $500.00 plus shipping. I did the swap myself, not a hard job. I have not hauled much of a load on it yet, the heaviest load was a 1999 3/4 ton diesel Suburban. When it had the 5.29 rears we never had to shift. Drove it through the mountains of Colorado with no problem. It was just a cab and chassis. The 4-53T detroit diesel is only 170 hp, but appears to be very adequate for my plans. I will be hauling an antique tractor (8,200 lbs).
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