88 GW Trans and Transfer case fluid type and capacity

Grand_Wag_85 · Post by **Grand_Wag_85** » Thu Apr 15, 2021 8:13 am

Getting ready to swap the trans on my '88 and I just want to make sure I've got the right fluids and quantities.

DEX 3 for the trans and also for the NP229, correct? How much?

sirrus · Post by **sirrus** » Thu Apr 15, 2021 9:00 am

6 pints for 229 and 8.5/17 pints for 727, according to 88 owners manual

Grand_Wag_85 · Post by **Grand_Wag_85** » Thu Apr 15, 2021 9:29 am

sirrus wrote: ↑Thu Apr 15, 2021 9:00 am 6 pints for 229 and 8.5/17 pints for 727, according to 88 owners manual

Awesome, thanks!

candymancan · Post by **candymancan** » Fri Apr 16, 2021 3:25 am

I used this for my 90. Been driving great for 6 years and 32k miles. I was planning on dropping the pan soon to change the fluid again should be like 5-6 quarts for that. I did a full flush through originally using the transmission cooling line .. so i used like 14 quarts.

https://www.walmart.com/ip/Super-Tech-A ... lsrc=aw.ds

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