catdaddy300 Posted August 16, 2014 Report Share Posted August 16, 2014 Ok so i change my oil regularly along with plugs and wires and everything but what are the recommendations on a a trans drain or the fluid in the differential? I have heard from people around me say that if you dont have any problems or leaks with the trans dont ever mess with it. I know that sounds really iffy but i couldn't find any solid milages for the different kinds of services. My truck is creeping up on 90,000 miles and i feel like it is time to at least get new tranny fluid or something bc i know i have never changed it or added anything to it! If you could help a brother out or at least point me in the right direction that would be awesome!!!! Quote Link to comment Share on other sites More sharing options...
90zxdriver Posted August 16, 2014 Report Share Posted August 16, 2014 I flushed mine at 60k when I bought it and I'm gonna do it shortly again at almost 100k. If i bought the truck at 100k and it had never been done, i wouldn't flush it but since I have regularly flushed it, I'm not worried about having it flushed again. Quote Link to comment Share on other sites More sharing options...
catdaddy300 Posted August 16, 2014 Author Report Share Posted August 16, 2014 I bought mine at 30,000 and have done nothing with the tranny since its never had any problems and from what i have read i know i wont flush it just drain it. Quote Link to comment Share on other sites More sharing options...
dieseltech320 Posted August 17, 2014 Report Share Posted August 17, 2014 I changed my tranny fluid at 100,000. didn't flush it, just drained and filled with new. also did both differentials at 100,000 Quote Link to comment Share on other sites More sharing options...
Blown 346 Posted August 17, 2014 Report Share Posted August 17, 2014 Dont flush it, just drain, refill and replace the filter. Quote Link to comment Share on other sites More sharing options...
catdaddy300 Posted August 17, 2014 Author Report Share Posted August 17, 2014 cool sounds like i am on track then. ill drain and refill the trans and the differential then also Quote Link to comment Share on other sites More sharing options...
Blown 346 Posted August 17, 2014 Report Share Posted August 17, 2014 I normally run a little extra fluid in the Diff to clean out anything that got stuck behind. Its a pain to fill to it, but well worth a little fluid. I used a clear house and used that to fill it since the fill is in a tight spot. Quote Link to comment Share on other sites More sharing options...
Downeast Johnny Posted August 18, 2014 Report Share Posted August 18, 2014 For filling the front differential, I use a gear oil pump made to refill an outboard motor lower unit gearcase. Not this exact one but this one is probably as good as any of them. http://www.amazon.com/Shoreline-Marine-Pump-Lower-Unit/dp/B004UOPZ9S/ref=sr_1_1?ie=UTF8&qid=1408320112&sr=8-1&keywords=outboard+motor+lower+unit+gear+oil+pump Quote Link to comment Share on other sites More sharing options...
dieseltech320 Posted August 18, 2014 Report Share Posted August 18, 2014 I normally run a little extra fluid in the Diff to clean out anything that got stuck behind. Its a pain to fill to it, but well worth a little fluid. I used a clear house and used that to fill it since the fill is in a tight spot. literally the exact same thing I did to fill mine. great minds think alike! Quote Link to comment Share on other sites More sharing options...
catdaddy300 Posted March 23, 2015 Author Report Share Posted March 23, 2015 Ok so i was going to do my fluid change in my tranny and like 3 different people told me to drain all my old fluid and reuse it. This is a new one for me. Any thoughts on this? They said the friction from the fluid is whats keeping everything working right and new fluid would make it wear Quote Link to comment Share on other sites More sharing options...
levilz Posted March 23, 2015 Report Share Posted March 23, 2015 Sent you a pm. Quote Link to comment Share on other sites More sharing options...
EXGM Posted March 23, 2015 Report Share Posted March 23, 2015 (edited) Ok so i was going to do my fluid change in my tranny and like 3 different people told me to drain all my old fluid and reuse it. This is a new one for me. Any thoughts on this? They said the friction from the fluid is whats keeping everything working right and new fluid would make it wearSorry but that is the most absurd thing I have ever heard. ATF breaks down from heat, actually any oil does. Second you need to change your filter and the only way to do this is to drop the pan. Gm recommends at 50k and if you look at your owners manual most people qualify for severe use. City driving? Pulling a trailer? Lots of stop and go traffic? Temps regularly above 90? Check any of those and you fall under severe duty. At end of the day it's your vehicle do whatever you want but I always laugh when people say that their (insert vehicle here) is a pile of crap with nothing but problems. But when you ask them they have done zero maintence. As far as flushing I am against using chemicals in the flush process. When you drop pan you only get about 50% of fluid out your not getting old worn out fluid out of the converter and cooler etc. Edited March 23, 2015 by EXGM (see edit history) Quote Link to comment Share on other sites More sharing options...
catdaddy300 Posted March 26, 2015 Author Report Share Posted March 26, 2015 Yeah it just sounds kinda suspicious! I know lots of people dont ever even change there fluid at all! Does anyone know if GM even has a recommended fluid for the trans? I used Lucas in the front and rear and i dont know if they even have a ATF fluid but then again I haven't even checked, but if they dont have any ill just go with that AMSOIL Quote Link to comment Share on other sites More sharing options...
EXGM Posted March 26, 2015 Report Share Posted March 26, 2015 I would use DEX 6 it's expensive but is the best fluid IMHO. Its a semi synthetic. Quote Link to comment Share on other sites More sharing options...
levilz Posted March 26, 2015 Report Share Posted March 26, 2015 (edited) Yeah, they do have recommendations. At the time the SSS's were being made, GM called for Dexron III. That's since been updated to Dexron VI, per TSB 04-07-037D dated 11/21/07. Here was that TSB, if anyone is interested... http://www.atra.com/Dash/Fluid/ATFUsageBulletin.pdf As for the AMSOIL, let me know if you decide you would like to try it out. I can probably ship you what you would need, plus the filter, for less than you would pay local retail. It looks like the price should be a little less than the AC Delco fluid too. I don't mind you asking for a quote and shopping around either. To make price checking the Dex VI a little easier, the Delco part numbers are 88861003 for quarts and 88861045 for gallons. Here is info on the Fluid and Filter that our trucks use also. http://www.amsoil.com/shop/by-product/transmission-fluid/automatic/signature-series-fuel-efficient-synthetic-automatic-transmission-fluid/?code=ATLQT-EA http://www.amsoil.com/shop/by-product/filters-and-by-pass-systems/transmission/wix-transmission-filter/?code=58608-EA Edited March 26, 2015 by levilz (see edit history) Quote Link to comment Share on other sites More sharing options...
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