Yep, pulley is smaller and you need a shorter belt. It
does slow everything down alt,etc. Charge rate is not
at full capacity until 1100 rpms (correct me if I wrong
guys). Have had no problems with stock battery and
electrical system, A/C, PS. Many DML'ers have tested
this and a few problems have been mentioned concerning
major audio systems with forgive me "ungodly amplifiers". ;)
GS -
>
> Thanks for the info. When I bought this truck I was really bummed to see that
> the fan was belt-driven. I thought those things went out years ago. If I
> understand how the underdrive crank pulley works, are you saying that the
> pulley circumference is smaller than stock? If so do you also need to go to a
> shorter belt, and how does this affect the belt-driven systems because they
> are now turning slower(alternator, A/C, power steering)? I know all too well
> how attempting to correct or improve one area creates a whole new set of
> problems.
>
> Kevin
>
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