Is this true about trannies?

[patracy]

Back in the day, yes, it was better to leave well enough alone.

I bought my wife's Denali with 108K on the clock and the first thing I did was service it.

 

[strider12]

I blew a tranny once in my Scion XB

Wow

 

[jimipanic]

I've heard it both ways. Personally I'd just drop the pan, change the filter, refill fluids. If it's exceptionally dirty you could do it again in another 1-2k. I changed a lot like that when I worked in automotive and never had one come back with issues.

X2, did it to my ranger that way years ago

 

[dragracer]

I would'nt do a flush but should be ok to change filter and fluid. you are only changing about half of fluid with a fliter change. a flush with the cleaner can cause built up debris to come loose and can cause problems.

 

[Blskypilot]

Changing the filter by dropping the lan is equivalent to Changing your oil filter and topping g off the oil. Your not doing a Damn thing lol . No offense. But if the fluid is typically atf and not cvt fluid then don't mess with it. Atf is a detergent as well as a lubricant. If there is a ton of **** in the trans fluid from not being changed for 100k + mi then the new fluid will wash all that mess loose and could cause issues

I disagree but to each his own. I spent 5 years in an auto shop and did countless trans services when customers wanted them without having them fall apart half a mile down the road. I don't think the manufacturer intended for you to never service it.

Comparing this to changing an oil filter and throwing half a quart in is stupid. When you drop a tranny pan you are going to be emptying the system aside from what's in the cooler, lines etc. funny how when we refilled them it wasn't just throwing in half a quart.

I suppose that that all was back in the day before everyone had an internet connection and knew everything, old timers threw kerosene or diesel in to dissolve the gunk but I won't make that suggestion.

 

[tdi_g]

I blew a tranny once in my Scion XB

You did what in a Scion?!

 

[fgf214ga]

Yes yes yes very TRUE my father in-law was a master mechanic light through heavy ( my he RIP ) .

 

[ITSNOTME]

I would'nt do a flush but should be ok to change filter and fluid. you are only changing about half of fluid with a fliter change. a flush with the cleaner can cause built up debris to come loose and can cause problems.

I've been in this business for half of my life and ^^^^ THIS ^^^^ , I agree whole heartedly.

 

[potenza]

I've been in this business for half of my life and ^^^^ THIS ^^^^ , I agree whole heartedly.

I'll join this in agreement! My shop WONT service your trans with that many miles, unless you have a history of changing it with us!!!!!!!

 

[strider12]

When I ran service at a Ford dealership we would absolutely NOT touch a high mileage trans unless there was proof of a history of service.