Had the rear diff serviced today at 34K. $70 to drain and fill at the dealer. I pushed really hard for an answer about when to service the transmission. Finally the service advisor admitted they had serviced several transmissions on 07' + Tundras. A HA! I ask him what the procedure was; a flush and fill or a drain and fill? It is a flush and fill. They replace 100% of your old fluid with new WS fluid. He went on to explain that about 50% of the new WS fluid is added then the transmission is brought up to temp and there is one tech adding fluid while another tech monitors data on a laptop. It seems it is a time consuming process for sure.
I asked what the old fluid had looked like? He said it was still pink. I asked him if it looked new? He said no but it was far from dirty, burnt, or needing to be changed.
So I am no closer to a decision to pay out $250 for a transmission service than I was before I got more information. Hmmmm.....
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07' DC 4x2 SR5, TRD CAI, TRD Dual Exhaust, TRD Sway Bar, Line-X
I don't know how to add 4 quarts in to this thing and do drain and fill, and dealers do flushes. I wish I new an indy to do drain and fill!!
So better do a flush much sooner to avoid tranny going out with old fluid that pushes gunk around at higher mileage. Dealers are definitely TWICHY in doing SOMETHING that should be simple like tranny fluid. They know what has happened to some trannies when flushing at higher mileage.
Quote:
Originally Posted by TX RN
Had the rear diff serviced today at 34K. $70 to drain and fill at the dealer. I pushed really hard for an answer about when to service the transmission. Finally the service advisor admitted they had serviced several transmissions on 07' + Tundras. A HA! I ask him what the procedure was; a flush and fill or a drain and fill? It is a flush and fill. They replace 100% of your old fluid with new WS fluid. He went on to explain that about 50% of the new WS fluid is added then the transmission is brought up to temp and there is one tech adding fluid while another tech monitors data on a laptop. It seems it is a time consuming process for sure.
I asked what the old fluid had looked like? He said it was still pink. I asked him if it looked new? He said no but it was far from dirty, burnt, or needing to be changed.
So I am no closer to a decision to pay out $250 for a transmission service than I was before I got more information. Hmmmm.....
I haven't dropped the pan yet; i've done a drain and fill with new fluid but i won't drop the pan until 40k or so. And that will be in a year or so, with how much i drive the truck anymore.
IMO, just get 75% of the contaminants out with a drain and fill for a while. That's unless you have over 40k on the truck. Then i'd drop the pan for a good cleaning.
I think i'll order a new gasket when i drop the pan on my truck.
Would it stand to reason that if you drained it while cold there would be more in the pan compared to running it until in the temp range?
I don't know on that one. I do know that if the fluid's in the upper 130's-140F, it drains exactly the same amount as in the 115 range.
When i did my bro's truck, i was thinking i may get a little more out by doing it hot. But it was exactly the same amount.
There may be more in the pan while cold, i don't know. Guess next drain and fill, i'll have to do it cold to see. It would be a good thing to be able to get more out, that's for sure.
Guess this would all work about the same with my 4.7l, 5 speed trans?
Very, very similiar design except yours is a 5-speed vs. a 6. I don't know if you have the temp-sensor bypass on your trans or not. I know our 6-speeds do.
I'm fairly certain the 5-speeds are a sealed trans as well.
The temp-sensor bypass must be the reason for doing the transmission service at operating temp? What exactly does this sensor do?
On a full fluid exchange, they lock it open. Automatic transmissions work best when warm so, the thermostat doesn't send ATF to the cooler until it is too hot, otherwise it stays uncooled so it will come up to temp quicker.
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2007 Toyota Tundra Double Cab SR5 with the 5.7L V-8 and Doug Thorley headers
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Just a thought, would it be ok to drain the pan cold, measuring exactly, droping the pan, cleaning, reinstaling then filling the exact amount taken out. Why would this be any different than doing it at operating temp., would I be able to fill the amount drained?
Just a thought, would it be ok to drain the pan cold, measuring exactly, droping the pan, cleaning, reinstaling then filling the exact amount taken out. Why would this be any different than doing it at operating temp., would I be able to fill the amount drained?
I wouldn't think it would be a problem, other than residual in the pan once dropped that couldn't be measured very well. But you could just letter drain for a couple hours.
My fluid was warm when i drained it, but i let-er drain for an hour or so while i cleaned the inside of the truck. It still was dripping slightly when i put the plug back in.
It would be interesting to see how much drained for you with it cold. It's 3.2 quarts warm or hot, but i wonder what cold would drain?
Re: Transmission Fluid Change
Linear Mode
