i have a chance to 1990 250 with auto it is non intercooled can some on tell me the diff. between the intercooled and non intercooled motors beside the cooler.thanks anthony

 

non turbo? they always have been turbo. but the diff. is the cylinder head, injectors. (9mm vs 7mm) and diff rads,voltage regs... a few more thing im sure i missed

 

The non i/c motor has bigger injectors.

 

sorry meant non i/c been long day thanks for info

 

i can add i/c with no problems.ican get the truck for 2300.00 and it is clean

 

A non i/c auto motor will have no overdrive. The transmission is the TF727, your basic 3 speed. These trucks have a top to bottom flow radiator that is smaller then i/c trucks. They have a larger injector bore that makes them easier to turn up, but it makes the casting a bit thinner and more prone to cracking. Back to the transmission... Since diesels (the cummins) has a smaller RPM band then a gas motor, the rear end has to have very fast gears in it to get to highway speed. For example if your truck had 4.10 ratio in the rear it would top out at around 55mph with everything wound tight. All that to say that your truck should have a 3.07 ratio in the dana 70 rear axle. I would test drive it and make sure it gets up to 70MPH on the highway, just to make sure someone hasn't swapped axles. Also check the oil in the axle and look for leaks. The ring and pinion set are no longer in production, so it is an ordeal if you have a rear end failure in this rare ratio. You can change bearings, but if you need gears you can't get them. Hope this helps.