Engine or auto trans. Which will die first?
- Thread starter blaze17
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SnowLizard
New member
that's a trick question right?
IF both are maintained properly, I don't think either will die at 350k
IF both are maintained properly, I don't think either will die at 350k
LittleCaesar
New member
Trans by far. Most owners will at least try and change the oil. Trans fluid, ah no even despite the WS claim of lifetime.
SnowLizard
New member
ok, maybe you're correct, come to think about it, the trans DOES have wearable parts, like the clutch pack, and IMO, the torque converter.
so yeah, I can see the trans going before the engine, even with 'perfect' maintenance... but I don't think it'll be at 350k.
white_n_slow
Senior Member
I would suspect that a well maintained engine would outlive a well maintained auto transmission. Add to that the fact that more owners pay attention to engine maintenance and less so to transmission maintenance and things skew even further towards the trans crapping out first. That's my $.02, anyway.
Rock_Rat
Senior Member
I also heard that 96.7% of all statistics are made up - just like this one. Where did you pull the data to justify your statement?
EDIT: Take out the mileage and it would be a more realistic question. However, there are far too many variables that will skew this data. Is it a daily driver, lifted, armor, 35's, supercharged, stock, well maintained, second owner, used as a utility vehicles etc...etc...
IMHO the tranny will go before the engine regardless of the mileage. The 5VZ is a very robust engine.
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jeremyc74
Banned
350k mileage aside, I think the transmission is probably the more likely of the two to have a significant failure.
Automatic transmissions have friction plates that are eventually going to go bad no matter how well they're treated. Obviously Toyota has figured out how to make them last a long time, but they won't last forever.
The engine won't last forever either, but if it's properly lubricated and operated within it's designed temperature range it has the potential to last a lot longer.
Automatic transmissions have friction plates that are eventually going to go bad no matter how well they're treated. Obviously Toyota has figured out how to make them last a long time, but they won't last forever.
The engine won't last forever either, but if it's properly lubricated and operated within it's designed temperature range it has the potential to last a lot longer.
tx_shooter
New member
The variable to this question also depends on what modifications have been done to the 4R. Supercharger? yeah; better upgrade the trans or it will not last forever. I am currently working on an upgraded solution for my transmission now. I have a supercharger that has been on the motor for all but 10-15k miles of the 4R's 220k miles.
volkinator
New member
I want to know what you come up with. I also did the SC when my runner had about 209K. I just try to keep my foot off the skinny pedal... But it's nowhere near as fun!
tx_shooter
New member
Foot off skinny pedal? ha let me know how that works. Currently I am trying to find a local shop that will rebuild my trans with kevlar plates, up the line pressure, and install a higher stall speed torque convertor. That seems to be the common line of thought for setting up a transmission for a SC.
Rock_Rat
Senior Member
Heres my plan after I open up the exhaust.; IPT Valve Body Upgrade
Others on here have done this upgrade along with their SC.
NoVAphotog
New member
Do you even have to worry about the manual trans other than clutch/fluid changes? :reddance:
OldManKamps
New member
imp:
Chuckles89
New member
Bearings and synchronizers wear out
Original owner of my truck had the manual transmission replaced at around 200k miles. The PO didn't know why, but everything else on the truck seems like it was well maintained by the OO (PO, not so much). It must have been something catastrophic to warrant the replacement because I have the receipts for it and it was way over $1k. So the manual can and does fail, I just wish I knew why. For what it's worth, proper maintenance FTW.
BrianSD_42
New member
Im at 240,000 on my original trans. The engine made it to 199K on the orignal heads.
white_n_slow
Senior Member
FWIW, my local and trusted Toyota specialist (Jesse at ATLR) said that resting your hand on the shifter with a cup of coffee in your hand (basically applying downward pressure on the shifter) can prematurely wear some bearings, depending on what gear you're in. First time I ever heard that theory, but apparently he's seen it a few times. :crazy:
I've heard that a number of times over the years. I used to do performance driving events and one of the things the instructors would always say was not to put lateral pressure on the shifter because it would wear on the shims. Of course they might have just wanted to make sure everyone kept both hands on the steering wheel. Ultimately I don't know how applicable any of those things are these days with the advancements in materials and such, but to this day I only touch the shifter when shifting.
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