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How often do you change your transmission fluid?

  • 30k miles

    Votes: 271 38.4%
  • 50k miles

    Votes: 182 25.8%
  • 75k miles

    Votes: 69 9.8%
  • 100k miles

    Votes: 50 7.1%
  • never

    Votes: 134 19.0%
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How often do you guys change your TRANNY / Transmission fluid?

112K views 205 replies 115 participants last post by  bingramrt 
#1 ·
How often do you guys change your TRANNY / Transmission fluid?


Post your YR, Model & Trim.


i did mine in my 02 1500 ST at 50k/3yr mark.
 
#186 ·
I am a HUGE Amsoil fan. But not for the Dodge tranny. I tried it, and dumped it and went back to Valvoline ATF+4 Synthetic. These trannys seem picky, and the Amsoil was seeming to make it "slip" into gear. The mechanic warned me, and he is an Amsoil dealer, but against his warning I did it anyway. Never again. Its a great product, and its in my diffs, Oil, Transfer Case. But not my tranny.
 
#187 ·
im afraid to. i bought my truck with 95k on it. i assume it was never changed as the truck was neglected. i was always afraid to cuse it often causes problems if it hasnt been kept up with. shes got 143kish on her now still doing good.
 
#188 ·
#1. my truck has 105k. had it since 70k. i assume everyone will suggest i just do a pan drop and oil refill. 7qts or so. i know not to do a flush, but would you guys pump out the torque convertor too and get all the oil out i can while im in there? or is a 50% change of oil the right mix for an old tranny?

#2. why are some people adding 80weight gear oil to their trannys?

#3. how many inches lower is a new higher capacity oil pan, and how many quarts does it add to the capacity. its basicly just to spread the heat out a little more right? keep the temps down.
 
#189 ·
Every 60,000 miles on all of my trucks.
 
#191 ·
You could possibly change the fluid and filter but with that many miles I wouldn't suggest a flush, it might knock loose some debris that can cause damage.
 
#192 ·
i thought it was pretty funny i brought my truck to a local shop when i bought it last year to change the fluid filters and adjust the bands i looked under there a few days later and they didnt even drop the pan there was no marks on any of the bolts either lol
 
#193 ·
So what is the consensus on Royal Purple ATF? I see they do reccomend it ok for Chrysler trannys. ATF+4 I have used it with great results in my diff's and engines on the HEMI and my racecar. Also in my TH400 in the racecar. 75K Km on my Hemi tranny now, I should change it.
Also, how much do I need? I read you can pull the cooler line and run it out? Do you idle till it just stops pumping? Isn't that bad for internals? Run them dry??
 
#194 ·
I have ~130k miles on the truck at the moment.

I did the first at 30k, second at 60k, 3rd at 100k. Going to do the next at 150k, and every 50k after that.

Here are my thoughts:

- NEVER backflush this transmission. There is no point since there are two replaceable filters in the design, and it will only cause problems from blasting the junk already in the filter back into the system.
- Simply doing a pan drop / filter change / fluid refill at some normal interval should suffice for just about all trucks.
 
#195 ·
I don't change my transmission fluid.. Don't think I have ever changed it.

Now, I do change Transmissions. For a few years, I would put a rebuilt one in every 6 to 8 months. Saves on the ATF fluid costs.

I doubt I'll ever own a transmission that lives long enough to change fluid.
 
#197 ·
I just changed mine at 52k may have been done once by previous owner but notsure. Fluid was still really red and unburnt. Used 10qts of adavanced auto parts ATF+4 and 1qt of lucas trans conditioner on just a pan drop.
 
#198 ·
Wonder how our trans like that Lucas trans conditioner? I wouldn't have the balls to add that stuff.
 
#202 ·
^Actually, that is pretty much the preferred method. No worries.

I added a drain valve to my tranny pan for future changes; even if you're dropping the pan, it's much cleaner/easier to do it with the fluid drained first.
 
#203 ·
TRanny service

If the oil is not highly contaminated and it looks good for color, all I do is drop the pan and change the filter. Its the best way. I been doing this stuff since 1969. I have a problem with flushing anything, because most of the time stuff gets loosened up; that never would if you didn't mess with it. Then major problems.
 
#206 ·
I bought my 08 Power Wagon in 2010 with 19,200 miles on it and changed the fluid at 30K miles. The fluid looked great but will continue doing every 30K even though I only put 5000 miles on it a year. You can service the heck out of the tranny and not even come close to the cost of replacing it, so I figure what the heck. But, what do I know……...

Bret
 
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