Borg Warner 3'rd gen fbody rearend into my 4'th gen?
09-10-2004, 02:30 PM
#1
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Borg Warner 3'rd gen fbody rearend into my 4'th gen? Will a borg warner 9 bolt fit in my 4'th gen fbody? and how much punishment will this thing take?
I'm looking for a temporary solution to run ET streets while I save up for a real rearend.
I'm looking for a temporary solution to run ET streets while I save up for a real rearend.
09-13-2004, 03:08 PM
#4
Yes it will fit but your gonna have some fun trying to fit your brakes on to it. They use an oddball flange. The easiest solution would be to put the older style PBR's on and get new backing plates as the 9 bolts used from 89 to 92 used those PBR's unless you happen to be fortunate enough to have one of those versions. The 9 bolt is stronger than the 10 bolt and they use bolt in 28 spline axles but they have cone type posi's and they don't last very long. Parts are very pricey and pretty much non existent. I have blown two nine bolts. One snapped at the pinion and the other was a posi unit failure. Good luck
09-13-2004, 04:07 PM
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Originally Posted by cam
Yes it will fit but your gonna have some fun trying to fit your brakes on to it. They use an oddball flange. The easiest solution would be to put the older style PBR's on and get new backing plates as the 9 bolts used from 89 to 92 used those PBR's unless you happen to be fortunate enough to have one of those versions. The 9 bolt is stronger than the 10 bolt and they use bolt in 28 spline axles but they have cone type posi's and they don't last very long. Parts are very pricey and pretty much non existent. I have blown two nine bolts. One snapped at the pinion and the other was a posi unit failure. Good luck
Exactly what I needed to hear, I'll just save up and get a Moser rearend. Thanks for the info
09-13-2004, 05:10 PM
#6
Sounds wise to me. As an added bonus if the 9 bolt you have is a three series carrier ( 3.27 or 3.45 or 3.70 ) you should have no trouble selling it as the third gen scene is always hungry for the scarce three series parts. If it is a PBR style and you have the brakes that makes it even more desirable. Most I see listed on ebay sell for a decent buck... well when I say decent buck I mean for a stock rear that is marginally better then the 10 bolt. If its a 2.77 ratio its a hard sell. Good luck!
11-05-2004, 04:16 PM
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I used to have an 89 GTA with a Borg Warner 9 Bolt.... after having chip,upgraded fuel system, iginition system, and a built trany i split a drive shaft in half and snaped the pinion head right off
