It makes sense to do if you're changing the fluid anyway. It's very easy. You may want to apply the fix to hold the lines into the accumulator. It's a sonnax part - http://www.sonnax.com/parts/2534-dif...e-retainer-kit

If you're having laggy 2-1 downshifts that sometimes bangs back into gear, this may not help. I read that the 1-2 solenoid needs the trans side cover removed. Fluid gets in there, causing it to fail. My trans still has this issue even with the kit installed.