93 5.9 cummins rear main seal replacement

93 5.9 cummins rear main seal replacement install#
93 5.9 cummins rear main seal replacement manual#
93 5.9 cummins rear main seal replacement upgrade#

93 5.9 cummins rear main seal replacement manual#

speed compared to stock.īesides replacing the ring and pinion, we also offer numerous other upgrades, such as ARB Air Lockers, manual locking hub conversions, rebuild kits, ball joints, and so much more.

Or, you can also opt to go with a slightly lower ratio of 4.56 that would give you a higher RPM vs.

Unfortunately, in this scenario there is no such thing as a 4.23 ratio, but the closest would be a 4.10 that is readily available.

93 5.9 cummins rear main seal replacement install#

speed as with the factory tire size, you would want to install a 4.23 gear ratio (3.55/31*37). By using cross multiplication, we can determine that in order to have the same RPM vs. Lets give the example of upgrading to a 37' tire. speed are effected, even causing a disruption of the shift pattern on automatic transmission equipped trucks.

93 5.9 cummins rear main seal replacement upgrade#

But as soon as you upgrade to a 35' or larger tire, all of a sudden your RPM vs. As previously stated, most of these trucks came factory with a 3.55 ratio, designed to have a proper run out with a stock size tire (roughly 31' depending on model year). One of the best upgrades we can recommend for anyone that has increased tire size, is that of a ring and pinion ratio upgrade. For those of us that demand substantial power increases and larger tires, there is room for improvement to improve the reliability and performance that they can afford. Over the years, these assemblies have proven themselves relatively reliable on moderately used trucks running stock, or close to stock tire size and power output. From the factory, these housings were stuffed with either the popular 3.55 ratio, or the 4.10 most commonly used for heavy duty towing, as it delivers higher RPM's at lower speeds in comparison to the 3.55 ratio. The 70's were reserved for the automatic transmission, single rear wheel (SRW) applications, where the larger 80 was used in all duallies (DRW) or single rear wheel trucks with manual transmissions. Specifically regarding the Ram lineup, these trucks featured a Dana 60 assembly up front and either a Dana 70 or Dana 80 out back. Until the release of the 2003 Rams, Dodge had a long standing relationship with the acclaimed axle manufacturer, Dana, well known in the automotive industry for providing robust assemblies to support these heavy duty trucks, and numerous other applications. There is a killer dowel pin repair kit for about $60, which includes a tab, timing cover gasket, and front crank seal to put the engine back together.įiled Under: 5. These bolts loosen over time and will do just as much damage (or more) if they fall into the front geartrain. OE exact fit gasket kits for easy repairs. While you’re in there, make sure to tighten up all the gearcase bolts. Shop the best 5.9 12V Cummins replacement engine gaskets & seals. With the front of the engine stripped, you can install a small metal tab over the dowel pin to keep it from wiggling out. The fan, shroud, overflow bottles, balancer, and lower pulley all need to be removed. To repair or prevent the Killer Dowel Pin issue, most of the front of the engine needs to be disassembled to gain access to the timing gearcase. Below is a quick overview on repairing the 5.9 12v Cummins killer dowel pin. It takes some time and effort to access the killer dowel pins location. Don’t let this small dowel pin cause headaches that can be avoided. Otherwise, the 5.9 6BT is an excellent engine. It’s one of the most common, potentially severe problems on the 5.9 Cummins turbodiesel engines.

While this last scenario is rare (a hole in the timing gearcase and a big puddle of oil is most likely), it has happened to many Cummins 5.9 12 valve diesel engines, which is how it got its name-the killer dowel pin (KDP). This typically causes the cam to break, the valves to hit the pistons, and the engine to internally self-destruct. The steel dowel pin could jam between the timing gears.It could hit one of the timing gears and shoot out the side of the timing case, creating an oil leak.When the dowel pin falls, one of several things can happen. The dowel pin can: If (or when) the dowel pin works its way completely out, it falls into the timing gearcase. Over time, this steel dowel pin can wobble out due to the constant heat cycles and vibrations of the engine. The 5.9L Cummins 12-valve diesel engines, manufactured between 19, feature a steel dowel pin that locates the front timing gearcase. 5.9 12v Cummins Killer Dowel Pin Problems