Quote:
Originally Posted by shepherd57
I have the 545 in my Isuzu powered 32.5 it is a good trans but it has no lockup converter and no overdrive. I am thinking about putting in an Allison 5 speed with the lockup converter. It will bolt right in and will need a stand alone wiring harness and Allison TCM to make it all work
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In your application I'd stay with the 545 and change the rear end gear to get the same effect as an overdrive. The 545 has so many clutches/plates it is better than a 'lock up' convertor.
I should/would have done that except I increased the input torque well above the max input for the 545