Corbin, could you edit this to make it a little more friendly, and make it a sticky? This section is getting cluttered with the same questions over and over again. Here's some info people just can't seem to find. Here are some FAQ's that never need to be asked again.

Final Drive Mod Install:

http://www.geocities.com/rbsounddesigns//finaldrivemod.html
OR
http://www20.brinkster.com/amljbs/finaldrive.htm

Where to get it?

Bob Kise (Parts Manager)
Forums Motors Group
Phone: (810)714-3300
Fax: (810)714-5013
15123 North Road
Fenton, MI. 48430

How Much?
Some only paid $90 and some up to $110

Is it worth it?
YES!

Shift Kit Install:

http://forums.2gnt.com/dcboard.php?az=show_topic&forum=5&topic_id=32410&mesg_id=32410&listing_type=search
OR
http://www.rhinehart.net/transgo.htm

Where to get it? Part#K72908J
http://www.northernautoparts.com
Or
http://www.transtarindustries.com

How Much? $17

Was it worth it?
YES!

Do I need a tranny cooler?
It can only help.

Do I need a tranny temp. gauge?
If you wanna see your tranny temps.

What can we do to make our trannys fast and reliable?
Thanx to ASOG you have this list:

and here is a list to build the best a604
get all these parts and your set

Transtar High Energy Rebuild Kit - K7200H $193.00 This kit uses the Raybestos High Energy clutches (kevlar)
Transtar Shift Kit - K72908J $26.00 www.naparts.com
Transtar Differential Pin Safety Clips - 72984 $5.00 each 2 needed and any trans shop (even the dealer) These are plates that sit on the outside of the diff and hold the pin in the assembly.
Transar Booster Valve Upgrade - 7208V $15.00 raises the line pressure for better shifts
Alumunim Accumulator pistons - part number unavailable (looking) $15
Phantom Grip LSD - 904 $271 www.phantomgrip.com
2600 Stall converter - $300 Hughes converters (core needed)
or 2800 Protorque High stall converter
updated solenoid pack Shifter Solenoid - dealer part (depends on year 98+ use different plugs I think) or Precision International Part Number K31900-6
B&M Trans cooler - $45
Raybestos inline microfilter - $30
Autometer Trans Temp Gauge - $45
Drain plug - $5.00
Mopar Anti-Foam Additive
Final Drive gear set Mopar part# 4773275


Will I be able to beat a MTX when I install these?
There's only one way to find out. Go do it!