I found this info from J-body.com if anyone else is interested. If you are not comfortable doing fluid changes it's probably not a bad idea to have someone else do it (or help out)
Re: Getrag F 23 Transaxle
"Tools needed:
3/8" drive: ratchet
3/8" drive: 5/16" allen/hex socket
3/8" drive: extension (at least 12" long)
3/8" drive: Torque Wrench
5/16" allen wrench
12" length of pipe (used as a breaker bar, slips over the end of the allen wrench)
Drip pan
Flexible funnel
Towel
Fluid Needed:
2 quarts of (insert the name of your preferred transmission lubricant HERE).
1. Either jack-up the front end of the car or drive the car onto a set of ramps (Pep Boys sells "gorilla ramps" for $17 per set, they hold 4000lbs each).
2. If you are using a jack, make sure to use a set of jackstands. In any instance, chock the rear wheel and put the e-brake on (prevent rolling backwards and subsequent death from a 2000+lb piece of steel landing on your chest.
3. Locate the transmission drain plug (a the very bottom of the trans case, 6 o'clock position, has a hex-type plug)
4. Insert the 5/16" allen wrench into the drain plug, place the piece of pipe over the end of the wrench, and loosen the drain plug. Make sure to place the drip pan under the drain hole (duh?). From this point, you can spin off the drain plug with your fingers, the pipe/allen wrench combo simply makes it easier to break the plug free. I use an allen wrench because there is not enough room for a ratchet/hex socket combo -- the drain plug is very close to a steel front-end crossmember.
5. Let the fluid drain into the pan -- go smoke a cigarette, do whatever, just make sure to let all of the fluid drain out of the case.
6. Replace the drain plug -- use your finger to thread the plug in, and then use the allen wrench to snug it down DO NOT USE THE BREAKER BAR TO TIGHTEN THE PLUG. Use the allen wrench as your guide -- tighten the plug until the allen wrench flexes slightly. Wipe the mess with your towel.
7. Locate the fill plug -- the fill plug looks identical to the drain plug, except that it is at the top of the trans case, next to the red transmission vent cap. Open your hood, lean over the driver's side wheel well, find your ABS modulator, and look DOWN. There is the plug.
8. Attach the hex-drive socket to the 12" extension, attach the extension to your ratchet, insert the socket into the fill plug, and unscrew the plug. To prevent from dropping the plug, partially unscrew it and then fish your hand around the air intake and unscrew the plug the rest of the way.
9. Place a long-spout flexible funnel (Autozone and Pep Boys sell them -- they are made by Blitz -- they have a blue top with an 18" long flexible tube attached to the bottom of the funnel) into the fill plug hole.
10. My getrag calls for 1.8 quarts of fluid. Save yourself the trouble and just pour in 2 quarts. The additional .2 quarts will not harm your transmission. TO REVIEW: pour in 2 quarts of (insert the name of your preferred transmission lubricant HERE).
11. When you finish pouring, let the funnel drain for a minute, and the remove it from the fill plug hole. Use your towel to wipe any mess.
12. Re-install the fill plug (using a similar process to step 8). However, set your torque wrench to 28 ft-lb and tighten the plug using this torque setting.
13. Clean any spills, throw away any empty bottles, and remove the drain pan from under the car, remove the wheel chock/jackstands.
14. Lower your car to the ground or drive it off the ramps.
15. Enjoy a smooth-shifting transmission
Sincerely,
illtmprdman"
From J-body.com
They also recommend RedLine ATF
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