![]() ![]() Thinking about putting an Allison behind your Cummins motor? There are a few simple steps to take in order to determine the correct Allison to choose:ġ) What diameter tires are you running or do you want to run go to the Allison RPM calculator page and enter tire size, ie: 235/85/16 or 265/75/17 and your tire diameter will be calculated.Ģ) Determine your rear end gears, ie: 3.73 or 4.10’s, if you do not know and nothing has been altered from the factory original you can always call your dealership’s parts department give them the last eight numbers of the VIN and they can give you the correct information.ģ) Enter that information on the left hand column and look at the chart to determine where you fall in the green range. An Allison, regardless of whether or not it is modified, brings strength to an area where ’95-to-’09 Ford pickups (and aforementioned Dodge rigs with 12- and 24-valve Cummins engines) suffer. WHY YOU WANT TO INSTALL AN ALLISON 5 OR 6 SPEED TRANSMISSION BEHIND YOUR 12V, 24V 5.9L OR 6.7L CUMMINS DIESEL ENGINE The older automatic transmission dating from 1989 to 2002 when the 47 RH then the 48-RE transmissions were introduced were designed after the 727 Torqueflight Chrysler transmission and were never suited for the diesel market. And while the rivals are already offering a 10-speed automatic transmission, RAM still provides a 6-speed automatic transmission. However, the biggest mystery is the new transmission. ![]() Custom Automatic (CA) Conversions has put years of research and development into providing you with the components needed to put a 5 or 6-speed Allison 1000 or 2000 series transmission behind your Cummins. How To Get Started Determining the Right Allison for YOU Maby admin The next 20 will introduce a couple of important upgrades. Put the ultimate transmission in your 1998.5-2002 Dodge 5.9L Cummins with the CA Conversions Allison Conversion Kit. The converter can be used for a core towards the proper torque converter. These converters are built with weak clutches and bearings and not uncommon, when used behind a Cummins the studs will tear out due to the low end torque demand. Once enthusiasts recognized the power and flexibility of the Allison 1000 Series, the Cummins Allison conversion gained popularity. The stock GM converter that will come in a used Allison 1000 PK should ALWAYS be replaced. GM continues production with this engine-transmission combination today. Once you determine that an Allison transmission is the best option, choosing the right torque converter is the next step:ġ) What horse power is your Cummins running and what is your ultimate goal.Ģ) What is your total maximum weight while towing.Ī) If you are under 450 horse power and tow only light loads a standard heavy duty (HD) Allison converter will be fineī) If you are at about 450 to 550 horse power and you tow light loads a custom built “KC” HD single clutch torque converter will be sufficient.Ĭ) Over 600 horse power triple clutch is always recommended.ĭ) With higher horse power and towing heavy loads, pulling or sledding a custom built HD triple clutch may be the best way to go How To Determine the Right Torque Converter ![]()
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