This weekend I plan to change my Trans fluid and filter what all should I know? Any tips you guys have? How much fluid does the trans take it’s a 47re btw. Also I have heard of flushing only part of the Trans and all of the trans what’s the difference and how do you do both? Should I buy a new seal for the pan? Also what fluid do you guys recommend? AS you can tell this is my first time to ever change auto trans fluid. I just want to know what im getting into before I change it.

Thanks for the info in advance guys
Chris

 

Tips: Install a drain plug while you have the pan off...you'll find out soon enough, as soon as you drop the pan in fact. Make sure you have plenty of cardboard down on the ground, the ATF will go everywhere.

Check your owners manual for how much ATF+4 to use, don't use anything but ATF+4, or you'll be changing it again soon. Don't bother buying a new seal, use RTV, its easier and cheaper.

To change the fluid in the cooler and T/C, pull the cold-line off the transmission and prop it into a bucket or drain pan once the pan is on and the new fluid is in. Have someone start the truck and watch the fluid coming out, once it turns bright red, shut the truck down, re-attatch the line and top off the fluid...your all done after that.

 

As recommended by most diesel tranny experts I've been using Dexron III plus one bottle of Lubegard Black for 240k. Much cheaper than +3 or +4.
Many folks here do likewise with no problem.

 

^^ Thanks Bill, I couldn't remember the other concoction guys run...don't need that stuff in a handshaker.

 

They sell the tranny filter at Autozone for $7 and it includes a brand new gasket for the pan. The 2-3 star bolts that attach the tranny filter to the valvebody don't need that much torquing. I feel like they strip easily. I used Supertech ATF+4. Took about 8 quarts I think. Do put a lot of cardboard underneath and be prepared to get messy. I installed a B&M drain plug in my pan and it is a must, BUT it leaks now... You might want to solder or weld the drain bolt in. I've been thinking of buying this with a drain plug already built in:

http://cgi.ebay.com/ebaymotors/ws/eB...ksid=p3907.m32

Should fit but I'm not 100% sure. My only concern is the depth and it should be enough on that one.

 

Doesn't look like it'll fit from what I remember of the 47RH on my 95...it was definitely more square than that one. A Mag-Hytec pan is nice for the same reason, BD offers one, so do a few others. They'll have a drain pan, they'll hold more fluid, and most are aluminum with fins, which will keep things cooler. They aren't cheap, but if you like your tranny and don't plan on upgrading it (with a slightly modified engine) its worth it in the long run.

 

Well I'm 95% sure the bolt pattern is the same on the 47RE and 727 pans. The depth is my only concern, which I think the minimum is 3".

 

hi

for a drain i drilled a hole and welded in a 1/8 steel pipe nipple and used a allen head pipe plug = no leaks here !