So I'm looking into replacing the transmission fluid in the truck I just bought. The fluid is still red and it doesn't smell burnt, but the guy who sold it to me did do a lot of towing. Its also a high mileage truck {250k)
Now, I've been reading more and more than doing a full flush at the dealership can be dangerous (they use a machine to drain the liquid, apparently you can dislodge things that might fuck up the tranny, yadda yadda), drain and fill won't replace all of it, but might be better
so is this true or what? my tranny works perfectly fine as far as I can tell. I'm just obnoxious about scheduled maintenance, but at the same time, I don't want to fuck my shit up
tl;dr: Are machine operated full flushes bad for older trannies, is a drain and fill a better option?
If you do it when scheduled on the manual you could but since you don't know if the transmission fluid is the original or when the last time it's been changed I would just drain the fluid and refill and change trans filter if you can
Bentley Foster
Just do a drain every 10k or so miles, ATF Bottles are like 10-15 per qt so its like 30-45 dollars versus the 250 or some shit they charge for your 75k full flush. It's just easier and cheaper.
Owen Cook
What I do when I buy a car with unknown history is undo a tranny cooler line at the radiator, buy a gallon of atf.
Have the cracked line in a gallon jug, and run the car for 20 seconds or so increments adding new atf so ideally you have a gallon drained and a gallon added.
Do this every oil change and you slowly purify your atf, without any drastic changes.
It's also easy as fuck.
Ethan Barnes
if the transmission isn't slipping noticeably, I usually recommend drain, fill, Italian tuneup, then drain and refill. if you keep it clean you won't have to rely on gunk to hold it together later in life
Camden Gonzalez
If it is slipping then what?
Kevin Jackson
don't touch it, just top off the fluid. if the fluid looks burnt, you'll likely have to do the change anyway so best of luck
Leo Martin
>Italian tuneup What did he mean by this
Camden Mitchell
The fluid isn't burnt but it's still slipping what do?
David Collins
Should I do a tranny flush or drain if my gearbox has "hard" shifts? >e.g: when braking and the gearbox is downshifting, the downshifts create a noticeable jerking motion
