Thread: High mileage transmission, change fluid or not?

Originally Posted by Mike Kerr

Please take a second look before putting any DEX III in your car. DEX III is no longer licensed by GM. DEX III no longer has to meet any quality or content or formula standards. I can legally take used motor oil, dye it red, and put in in a bottle and sell it as DEX III.

Put DEX VI in your car. Has major improvements over DEX III, and is licensed by GM to exact standards. Wal-Mart has a great price on DEX VI.

get real dude, dex 3 is fine, dex 5 is to thin for older trannys that are beat up. the crap people come up with is mind blowing.

Originally Posted by Scottydoggs

get real dude, dex 3 is fine, dex 5 is to thin for older trannys that are beat up. the crap people come up with is mind blowing.

I had a guy tell me the same thing about dexcool, that if I used the regular prestone green I would blow my engine lol **** seems to be running strong n doin just fine...

I just did my pan drop, filter and i customized a shift kit for my trans. Used dexIII and all seems well. Just make sure when u take the accumulator apart that the springs n shims are seated correctly inside piston bore. Also mark the 3 steellines before u pull them off because they are only held into place by the accumulator being bolted down. I also cleaned up the pan and mating surfaces with scotchbrite as well as reused old gasket...no leaks no probs...

I used 2 quarts well, 1 1/2 of Lucas and 6 of dexIII and my trans shifts like it was brand new now. 114k on original trans with that being first trans fluid change.....

You will get a mixed bag of comments of ideas from everyone here, you take the good and the bad and you try and make the best decision possible. If that trans is on its way out then what do u have to lose besides 50$.....