I really don't remember such a link with step by step photos...but it is very easy to do yourself. I have fashioned a few "tools" that make handling the fluids easier...such as a pressure pump to deliver tranny fluid...will be glad to share thoughts with you.
Warm all fluids by driving at least 30 min....diff fluid can be VERY THICK.
Tranny...remove plate (10-12 bolts, use 15mm socket), open drain plug using SQUARE 3/8 inch male pipe plug socket or a short 3/8 inch drive (at rear on right side), dump fluid. When down to occasional drip, replace drain plug...torque to 28 ft-lbs.
To fill, remove fill plug (using same square drive)actually, I loosen it prior to fluid dump...located at left rear, high up on tranny, with a fluid sticker below it... Fill with appropriate tranny fluid til just below opening hole...but as this is very hard to see, I fill it til fluid runs out, and quits dripping)... replace plug, tighten to 20 ft-lbs. Many use MOPAR "Synthetic Manual Transmission Lube75w85"...as do I in 1999-2003 Vipers...though I stick with Dexron III in our 95, 96, 97. It takes 4 quarts to fill ( PS..Dexron III superceeds Dexron IIE...but DO NOT confuse it with ATF+3 or ATF+4 as some have done). (Do a search covering past 6 weeks for full explanation of fluid choices)
For diff, remove plug with 3/8 inch hex Allen male socket: I **** out fluid with a modified brake bleeder driven off of air compressor)...then refill with "MOPAR 75w140 Synthetic gear and axle lube PLUS 4oz of the synthetic additive(takes about 44 ozs TOTAL)...replace plug, torque to 180 INCH-lbs ( NOT FOOT LBS !!!)
Hopefully others will share thoughts as well....but this can help you start planning...having FUN...and saving $$$$, while you get to know your Snake !!!
Call if you like...317-402-9013
Steve Fess Sec. VCA Ind/Ky Region, Inc.