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Unread 05-07-2009, 08:26 PM   #1
craddock01
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1996 ZJ 
 
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Tranny-To flush or not to flush?

1996 ZJ Fluid was real dirty,shifting OK except a little slip when cold first shift of the morning. Changed filter and fluid panwise today would like to change out fluid via hillbilly driveway flush procedure but I'm hearing flushes can do strange things to tranny like kicking up crud needing rebuilt soon thereafter,anyone have problems or input?

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Unread 05-07-2009, 08:29 PM   #2
mgramann
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I would "slowly" change the fluid... Change the pan in a few weeks again, then again a few weeks later. It will slowly introduce new fluid and be less "shock" to the system.
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Unread 05-07-2009, 08:43 PM   #3
craddock01
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I hate the thought of that black stuff mixed with the nice red stuff
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Unread 05-07-2009, 08:49 PM   #4
Wheelin98TJ
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Doing a flush is no different that the conditions your tranny sees every day when you drive it.

You are using the tranny pump to drain and replace the fluid. This is in no way harmful to the tranny.
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Unread 05-07-2009, 08:55 PM   #5
mgramann
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Did the fluid smell burnt? I know that sometimes if you put new tranny fluid in a tranny that is on its last leg, sometimes you are better off leaving the burnt, less efficent fluid in the tranny. Thats why I suggested a slow change. If the tranny is good a flush shouldn't hurt it though.
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Unread 05-07-2009, 08:58 PM   #6
craddock01
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Thanks guess I'll go for it see what happens maybe I'll save the old fluid and if it starts acting up I'll put it back in.....
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