Ted, 10k to 15k on the engine is good. I switched to synthetics in my differentials at approx. 3k, my trans. and transfer case at approx. 7k. I also added the Mag-Hytec diff. cover and trans. pan at the same time I added the synthetics. You can switch to synthetics in the differentials, transmission and transfer case as soon as you want... the sooner the better too.
..... now I'm waiting for my ordered double deep Mag-Hytec trans. pan (to replace my Mag-Hytec deep trans. pan) to arrive.
#ad
------------------
John Treibel
'98. 5 2500 QC 4x4 Sport, Glasstite Vision II, 285 BFG A/Ts on M/T Challengers, Warn 4X Boards, Mopar fender flares & tow hooks, NW Custom s/s-rubber mud flaps and accs. , Mag-Hytec diff. cover & trans. pan, Edelbrock IAS shocks, Reese Titan V hitch, SPA gauges (3), Dynamat, '00 Sport grille and headlights/PIAA Super White bulbs, PIAA Dual Sport 900 aux. lights, BD exh. brake, Amsoil Dual Remote Bypass, Optima Yellow Tops, DD3s and DD TTPM, Aeroquip AQP braided s/s fuel hoses, Banks High-Ram intake manifold and 14 cm2 turbine housing w/Big Head wastegate actuator, ATS 3-piece exh. man. , Banks 4" dia. s/s exh. sys. , DTT 93% TC, DTT custom tuned VB, BD modified trans. front pump (enhanced by DTT), Air Bulldog induction hood (with NACA ducts), plus MANY other trick modifications
[This message has been edited by John (edited 02-16-2001). ]