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ThaddeusW

Need Some Tranny Info

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I power washed the crud off the transmission and it says TRTL-72. Now what does 72 mean? I see that if it was a

720 it would denote an overdrive gearbox. is it a 13 speed in the sense that you dont split 5th correct?

just 4th hi and strait to 5th.

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TR = Transmission

T = Triplex

L = Lightweight version. (Aluminum top covers)

72 means it is direct in 5th. (hi split in the compound is overdrive)

This is known as a single overdrive triplex.

It is a 15 speed. (can also be split shifted in 5th just like in the rest of the gears.

I believe this is the same as the transmission in Larry "Freighttrain's" B61.

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Ya, mines a single over triplex, though not a lightweight version(only a TRT). You can split all the gears right up to the big hole!

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