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Old 08-22-2011, 06:21 PM
Junior Member
Join Date: Aug 2011
Posts: 4
Change or not to change transmission fluid

I have 2 buddies that changed transmission fluid and had a flush performed only to have transmission crap out months later. I am aware that all good truck owners are supposed to do this but I am leary of letting my local oil change guys do this for fear of a dead truck. Advise?
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Old 08-22-2011, 06:26 PM
Senior Member
Join Date: Oct 2008
Posts: 1,061
Ive never done a flush but have changed the fluid in the pan and never a problem.
1997 4x4 F150
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Old 08-22-2011, 11:08 PM
Senior Member
Join Date: Jun 2004
Location: Florida
Vehicle: 1997 Ford F150
Posts: 191
^ +1.
97 4.2L V6 2WD LB 56k miles
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Old 08-23-2011, 02:39 AM
Senior Member
Join Date: Mar 2009
Location: Fl
Vehicle: 1997 Fard F150
Posts: 266
Depends on the mileage. Ford transmission like to be changed every 30k. If you havent had one done and the truck has over 100k dont do it..
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Old 08-23-2011, 10:41 AM
Senior Member
Join Date: Jun 2007
Location: Utah
Vehicle: 1999 Ford F-150 5.4
Posts: 5,134
I changed mine on my truck when i bought it it had 103k on it then and the pan had never been off so it was original fluid. I changed it again 10k miles later and again 10k miles after then this year I changed to Amsoil and I'm going to leave that in there for the next 5 years or so. So I've Changed it 4 times in the last 5 years. guys who get 200+ thousand miles out of there Transmissions maintain them. People who never replace the fluid have them fail.

1999 F-150 xlt 5.4 4x4
1971 Mach 351c 5 speed TKO600 Tremac-sold!
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Old 08-23-2011, 12:02 PM
glc glc is offline
Senior Member
Join Date: Dec 2006
Location: Joplin MO
Vehicle: 2003 Ford F150
Posts: 28,499
If you have a torque converter drain plug, drain it and drop the pan, replace the filter. If you don't have a plug (they were removed somewhere around the 2001/2002 time frame) you can take it to a shop for a fluid EXCHANGE (NOT a flush).
2003 F-150 XL RCSB 2wd 4.2 M5OD 3.55 LS
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Old 08-23-2011, 12:17 PM
Senior Member
Join Date: Oct 2008
Posts: 1,061
Also I think glc was kinda trying to say this but a trans flush is what can be bad but a fluid exchange not so much.
1997 4x4 F150
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Old 08-23-2011, 12:17 PM


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