Trans Fluid and Filter Replacement

Mango · Mar 30, 2026

How often should change filter and Fluid on a 200,000 mile Burban
Last change was about 51,000 miles
And what fluid should use
Thanks

Jrgunn5150 · Mar 30, 2026

I use either Valvoline Max Life or Tractor supply hydraulic fluid in everything.

Matt69olds · Mar 30, 2026

I change the fluid and adjust the bands on my Ram every 25k or so. I do tow frequently. Some people say that’s overkill. The fact that I’m almost to 300k on a transmission that’s never been out of the truck, and is supposedly a problematic transmission says otherwise.

I would say your due for a service.

Mango · Mar 30, 2026

What ATF should i use if not doing a complete flush
Dex/Merc??

Finkaire · Mar 30, 2026

Dex/Merc would be fine, get an OE filter and a Felpro gasket. If the pan looks distorted in any way get a new one, they are inexpensive. You might also consider installing a drain plug on the pan. My 2 cents!

Ricko1966 · Mar 30, 2026

I would definitely install a drain plug or buy a pan with a plug. Drain and fill your transmission 4 times in the next month,just drain the pan and pour in fresh fluid. That will swap out most of the fluid. Then do a spill and fill every 6 months and your transmission will be happy.

Camar068 · Mar 30, 2026

I haven't done mine yet so can't vouch for it but looks easy. Remove filter seal easily.

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gmbellew · Mar 31, 2026

Do a pan drop, filter change, and install a pan with a drain plug. Then do a drain and fill at the next two oil changes or even each week for 2 weeks would be fine. From there on out, do a drain and fill at an oil change every 6 months or so. Might drop the pan and replace the filter every 2-3yrs. This all assumes a daily driver getting 12k+ miles per year.

Finkaire · Mar 31, 2026

BTW the reddish brown rubber gasket you can see in the picture is steel reinforced.
The gasket got stuck inside my transmission body and was a nightmare to remove. Considering having the service done next time

gmbellew · Mar 31, 2026

Finkaire said:
BTW the reddish brown rubber gasket you can see in the picture is steel reinforced.
The gasket got stuck inside my transmission body and was a nightmare to remove. Considering having the service done next time

The filter gasket does like to stay in the transmission. I have had good luck using a very small flathead screwdriver or a pick to slip in between the gasket and the transmission and deforming the gasket to the inside. Then it drops out easily.

Mango · Mar 31, 2026

Ordered a pan from Parts Geek and filter and Gasket from our local NAPA They also have Dex III Merc
I get a great Discount at NAPA

xm20k · Apr 1, 2026

I drain the pan and top back off in the spring and use Mobil Delvac tractor hydraulic fluid. Also mix a splash of type F in so I can see it on the stick since the Delvac is clear.

Note I'm not running the typical TH350/400 or 700r4 I'm running a race built power glide

Pardon Our Interruption

Mango · Apr 4, 2026

Hey its complete New Filter, 4.5 qts of ATF DEX/MERC
fell pro gasket, one bolt was mangled so replaced that one, and one hole is stripped!!! Its not leaking yet. Will have to fix that hole it does not go through so a nut and bolt is not a option
I will do a helicoil repair
Thanks for the replies

Mango · Apr 4, 2026

I researched the torque on the Pan Bolts its all over the place I tighten them to 90 in lbs??

gmbellew · Apr 4, 2026

Mango said:
I researched the torque on the Pan Bolts its all over the place I tighten them to 90 in lbs??

uh....no. they don't need to be much more than hand tight....

Trans Fluid and Filter Replacement

Mango

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Jrgunn5150

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Matt69olds

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Mango

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