Dont know what kind of maintenance your tranny has had but if it hasnt had regular fluid changes then dont flush it. That would most likely kill it. Just drop the pans clean/replace the filter and refill.

I used denso double platinum plugs in mine. I've always been a big believer in denso plugs and have had no problems with them.

Diff fluid changes would be good. Should be done every 30k miles. Front wheel bearing repack/replacement maybe.

--Dave

1999 Rodeo LS 3.2 4x4 5 Speed
32x11.50-15 BFG T/A KO on US Wheel 94 series
3" Lift - Rancho 9000x
Rear No-Slip Locker
Flowmaster 50 series SUV 2.25"

There is a very fine line between "hobby" and "mental illness." - Dave Barry