[BryceB]

My truck ('01 F-250 7.3 PSD 4x4) has a HD 4R100 auto transmission in it that replaced the original standard 4R100. it also has a Ford AIS intake and MBRP 4" exhaust.... Otherwise stock.

Would I get a chip with Sandard Tunes or is the HD 4R100 considered a modified transmission requiring Custom Tunes?

[cj45lc]

Pretty sure you can just get the regular tunes if you don't have a modified valve body in the trans.

[BryceB]

Ok, good, I didn't want to have to get custom tunes just because of the transmission since the rest of my truck is pretty tame (intake, exhaust and guards). The HD4R100 improvements are this:

• Enhanced Torque Converter for better performance and longer life
• Oversize one piece case bushing for improved durability
• Enhanced Forward, Direct, and Intermediate Friction plates for longer life under heavy load shifts
• All new special upgraded steel plates
• Center Support Enhancements for improved gear train life
• Mercon V-OIL for greater heat resistance
• Oversize Pump Gear Set for improved oil flow
• Upgraded Extension Housing Bushing for improved durability
• 45 Element Intermediate Sprag for greater strength to withstand heavy loads
• Special coast clutch drum for improved engine braking and increased durability
• All new iron planetary assemblies for improved durability
• All new one way clutches for improved durability
• All new electronics for improved reliability
• Revised calibration gives better shifts for heavy duty use
• Improved gasketing for reduced leaks