I have a RTO 16909ALL trans in my 379 Pete triaxle dump with a MBN C15 rated at 475 and 4.30 gears that has started to leak pretty bad. I'm not really happy with the rpm drop between gears either and want to install a different trans, preferably an 18spd for the added torque capacity once I turn the motor up and I shouldn't have to spin the motor to 1800 rpm to keep it from lugging down into the next gear and have my egts skyrocket. I run close to 80k when loaded and don't do a lot of off-road driving. My question is are they all the same length so it will be a direct bolt in or would I need to shorten the driveshaft? Any thing else I should consider? Any help would be greatly appreciated thanks
Fuller 9spd same size as 13 or 18spd?
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by C15Mike, Jan 17, 2018.