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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Dexron 5 fluid

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Old May 22, 2007 | 08:17 PM
  #1  
fordracer08's Avatar
fordracer08
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From: Dauphin, PA
Dexron 5 fluid

I have a 91 F150 4X4 5.0 5 speed. I want to change the trans and transfer case fluids. The manual calls for Dexron 3 fluid. Can dexron 5 be used in this application. Has anyone used Dexron 5 in there trans or transfer case. Any opinions appreciated.Thanks.
 
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Old May 22, 2007 | 09:25 PM
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jroehl
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From: Lafayette, IN
Well, actually, you're looking at Mercon III vs. Mercon V. Dexron is, I believe, a *cough* Chevy *cough* standard. There's a bit of a debate about whether V does harm to III trannies or not, but Ford seems to have put out a TSB that V is now acceptable in all trannies that previously required III, and III is being discontinued.

Jason
 
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Old May 23, 2007 | 06:23 AM
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fordracer08
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Dexron 5

OOPS. Yes I mean Mercon. I have read that Mercon 3 was being discontinued. Just wondered if anyone has delt with this issue. Thanks.
 
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