Re: Possi rear...yes and no...


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Posted by Ron S. on January 26, 1999 at 21:03:37:

In Reply to: Re: Possi rear posted by Stang65 on January 26, 1999 at 13:51:16:

You're both right! The easiest way to tell (at first) is to "free wheel" the rear tires, if they both spin in the same direction you need to "block" one wheel and spin again. The "free" wheel should not spin at first but with a "strong" hand (around 40-50 lb-ft) it should begin to spin with some definite resistance. The last check is AFTER you've gone to the trouble to remove it, you will be able to "see" the clutch pack attached to the ring gear, not just the 'spider gears'. The last step is best "seen" side by side, it's very tough to describe without some "visaul aids".

: Just jack the rearend up, try spinning a tire, if they both spin the same direction, you have posi, if they spin opposite directions, its an open diff.
: Although spools are cheap, don't buy one if you do a lot of street driving, my buddy has a mini spool in his '69 Ranchero, and you can literally see the inside tire hopping off the ground when he takes a turn, also very bad for leaf springs too.
: I'd recommend an Auburn pro series cone/clutch for 8" Ford rearends, (got one in my stang, the clutches are really tight, it skids just slightly when taking a turn) bad thing is they cost about $300, but most any posi does, also you could try finding a Ford Traction-Lok unit from the junkyard, and getting new clutches for it.
: and don't forget to pick up some Ford friction modifier (about $5) from the ford dealer to mix with your gear oil, so the clutches don't chatter.




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