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  #16  
Old 03-24-2009, 09:32 AM
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Re: adjusting brake band - dealer told me

Quote:
Originally Posted by oregondave View Post
I hear you but you still didn't explain why the POWER flush is a bad thing.
Lets say you have an automatic transmission with very small oil passages, and you have 120,000miles on it.
After years of 200° temps. jack jabbit starts, sitting in traffic, and the occasional tire spin,(snow or sand) tiny friction particles have been let loose in the system as the in transmission screen is not a filter, just a screen.
The hot mix of burnt friction material, dirty oil, metal shavings get lodged into cracks, like dust in the corners that never get swept.


Now someone hooks up a high pressure flush of some harsh cleaner followed by fresh fluid, and washes out all of the crap.
Suddenly the old dried out seals, no longer flexable, have bigger holes to seal.
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  #17  
Old 03-24-2009, 09:41 AM
SuberNatural SuberNatural is offline
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Re: adjusting brake band - dealer told me

Level 10 in NJ makes a transmission too
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  #18  
Old 03-24-2009, 10:06 AM
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Re: adjusting brake band - dealer told me

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Originally Posted by SuberNatural View Post
Level 10 in NJ makes a transmission too
I forgot about them.
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  #19  
Old 03-24-2009, 10:33 AM
RoughSilver92 RoughSilver92 is offline
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Re: adjusting brake band - dealer told me

Just trust him FLUSHING IS BAD!
I, too worked at a dealership, (bmw, mazda, isuzu) and they stopped doing flushes on cars with high miles because the majority of the cars they flushed came back not too long after needing a new transmission.

And a more recent example: My girls dad just replaced the transmission on his girlfriends 05 ranger because her transmission was shuddering a little going into O/D and she took it to the dealer they flushed it and it got noticeably worse.
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  #20  
Old 03-24-2009, 12:38 PM
oregondave oregondave is offline
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Re: adjusting brake band - dealer told me

Quote:
Originally Posted by svxfiles View Post
Lets say you have an automatic transmission with very small oil passages, and you have 120,000miles on it.
After years of 200° temps. jack jabbit starts, sitting in traffic, and the occasional tire spin,(snow or sand) tiny friction particles have been let loose in the system as the in transmission screen is not a filter, just a screen.
The hot mix of burnt friction material, dirty oil, metal shavings get lodged into cracks, like dust in the corners that never get swept.


Now someone hooks up a high pressure flush of some harsh cleaner followed by fresh fluid, and washes out all of the crap.
Suddenly the old dried out seals, no longer flexable, have bigger holes to seal.
so basically the congealed crud serves to aid seals in doing their job of preventing fluid leaks? removing this natural 'stop leak' would then lead to fluid leaks...ok but how does this (other than the loss of fluid) lead to earlier trans failure?

Not trying to argue just trying to understand.
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  #21  
Old 03-24-2009, 01:32 PM
essveeexxee essveeexxee is offline
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Re: adjusting brake band - dealer told me

10 characters.

Last edited by essveeexxee; 10-19-2009 at 03:32 PM.
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  #22  
Old 03-24-2009, 01:38 PM
bheinen74 bheinen74 is offline
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Re: adjusting brake band - dealer told me

drain and fill is fine, just don't power flush, that is what stirs the crud up.
I suppose the lines at the radiator should come off and let it drain out of the radiator.
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  #23  
Old 03-24-2009, 07:44 PM
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Re: adjusting brake band - dealer told me

Quote:
Originally Posted by bheinen74 View Post
drain and fill is fine, just don't power flush, that is what stirs the crud up.
I suppose the lines at the radiator should come off and let it drain out of the radiator.
I do use compressed air to blow through the trans cooler in the radiator both ways to make sure it's clear, once both cooler lines are disconnected.
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  #24  
Old 02-21-2010, 06:35 PM
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michael michael is offline
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Re: adjusting brake band - dealer told me

Shouldn't one bypass the trans cooler in the radiator in favor of an external trans cooler. I thought it was agreed that they become clogged due to the mesh inside pre '92. I did this years ago and have had no problems and better temps.
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  #25  
Old 02-21-2010, 08:39 PM
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Re: adjusting brake band - dealer told me

Quote:
Originally Posted by michael View Post
Shouldn't one bypass the trans cooler in the radiator in favor of an external trans cooler. I thought it was agreed that they become clogged due to the mesh inside pre '92. I did this years ago and have had no problems and better temps.
Yes.
The current thinking is to bypass the stock in rad trans cooler with a medium sized one to allow more flow in the trans.

The trick is to allow full pressure, and still mantain a >150°f, and <200°f transmission pressure.
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