4wd
$50 site donor 2026
BTW:
I have posted about BiL’s 400K Silverado.
Mobil Super bulk - bulk filter - 5K miles.
But yes, was doing the BG flush at 50K
OEM vs aftermarket ATF
- Thread starter FDT09
- Start date
I have posted about BiL’s 400K Silverado.
Mobil Super bulk - bulk filter - 5K miles.
But yes, was doing the BG flush at 50K
Is that one that uses the transmission's own pressure/pump? Or it has an external pump? I hear the external pumps are too powerful and will churn up all the gunk in the bottom of the pan. Then mess up the transmission. Hence why flushes have a bad reputation.
The machine has an internal pump but it is ONLY used to evacuate the machine once full. The vehicle is started and idles during the flush process utilizing the transmission pump.
Just an update in case anyone was interested.
I ended up buying a quart of Valvoline Dexron VI fluid (Blue bottle), and added 6oz or so into my transmission. That little shudder I felt during the first shift from R to D and from 1 to 2 is virtually not there anymore. But, it is also a little warmer outside. So not sure if it was the temp, or the fluid level.
Best I can tell, the fluid is now borderline overfilled per the dipstick. But also kinda hard to tell with this dipstick. Another 1000 miles and I'll be doing an oil change and another drain and fill of the transmission. Will also do a tire rotation, so might try pulling the side port to see if a lot of fluid comes out that way or not - if that's more accurate than the dipstick.
I ended up buying a quart of Valvoline Dexron VI fluid (Blue bottle), and added 6oz or so into my transmission. That little shudder I felt during the first shift from R to D and from 1 to 2 is virtually not there anymore. But, it is also a little warmer outside. So not sure if it was the temp, or the fluid level.
Best I can tell, the fluid is now borderline overfilled per the dipstick. But also kinda hard to tell with this dipstick. Another 1000 miles and I'll be doing an oil change and another drain and fill of the transmission. Will also do a tire rotation, so might try pulling the side port to see if a lot of fluid comes out that way or not - if that's more accurate than the dipstick.
I'm happy to hear LSJ recommends early drains on transmissions and differentials to remove wear metals. Too often we hear about lifetime fluids and 100k fluids. Coolant included.
2018 Chevrolet Silverado 2500 HD 6.0L dropped transmission pan, changed filter and topped off with A/T fluid after buttoning up at 65K miles. Didn't touch it again until this year at 123K miles and had the dealer do the complete transmission fluid exchange. The technician said it was "relatively" dark but it was not burnt smelling so all is good.
Pickup tows a 7,000# travel trailer less than 2 1/2 mo. out of the year which includes a trip up and down the AK/Canadian Highway to lower 48 at close to the 9,500# GVWR for the pickup. The rest of the time is a daily driver and not even pushed to its limits. Good for another 60K or so. If it was more months out of the year towing or with a heavier trailer, I definitely would increase frequence of fluid exchanges to every 35K-45K miles. Pay a little now or pay a lot later.
Pickup tows a 7,000# travel trailer less than 2 1/2 mo. out of the year which includes a trip up and down the AK/Canadian Highway to lower 48 at close to the 9,500# GVWR for the pickup. The rest of the time is a daily driver and not even pushed to its limits. Good for another 60K or so. If it was more months out of the year towing or with a heavier trailer, I definitely would increase frequence of fluid exchanges to every 35K-45K miles. Pay a little now or pay a lot later.