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Old 03-04-2019, 12:46 AM
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turbolover turbolover is offline
Currently: Working on the new/Old School Tow Rig.
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Things to look for on each of the Cummins model trucks.
93 - 97 2nd Gen trucks the mighty P-Pumped 12 valve. Most sought after motor. And the 5 speed manual is like buying gold. The 47rh then later 47 RE trans are alright at stock power levels but torque converters, clutches and input shafts fail with regularity at almost any added power levels.
98.5 - 02 24 valve motors with the vp44 injection pump. Still the same issues with the 47RE trans (you’ll find this issue with most trucks with any power adders, the trans is the weak link and WILL NEED TO BE UPGRADED )
Another issue with the VP 44 injection pumps is that the electronics are cooled by fuel flowing throw the pump. A weak lift pump will destroy the brain in a vp44 in short order. A dead lift pump is almost a certain death knell for them. (Hence the popularity of aftermarket Airdog and Fass lift pumps)
03-07 5.9 24 valve common rail. This is where you can make some real power. The 48RE is still the weak link.(torque converter, clutches and input/output shafts) (Do Not tow without the trans in tow/haul mode!! You can almost guarantee rebuilding due to over drive being destroyed)
The CP3 pump is a good reliable pump and very few issues. Use good clean fuel and keep it clean. A Baldwin BF7977 filter is cheaper than the OEM filter and far exceeds the micron rating. Dirty fuel can hang an injector open and you will wash a cylinder down and destroy that cylinder. Can’t stress this enough.
07.5 - 12 6.7 Cummins motors blue tech ( no DEF)
13 + 6.7 Cummins (DEF)


Up to I think it was 99 they used Dana 60 front axles and a hybrid Dana 70/80 rear. All of these axles use a unit bearing knuckle. Ball joints are an issue with all of these years as the weight of the motor causes them to wear prematurely compared to similar use in gas powered trucks.
00 - 01 they switched to AAM (American Axle) still use a unit bearing knuckle and a central axle disconnect to engage 4wd.

I can go Into more detail you need it.
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