8 3/4 diff strength

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Franky
Senior Member
Posts: 1002
Joined: Tue Jun 18, 2002 10:01 am
Location: From tropical Darwin to freezing Wangaratta

8 3/4 diff strength

Post by Franky »

:roll: Any idea how strong early mustang 8 3/4 diffs are as I'm running around 388hp and are about to tubb the ol 27 chrysler....15x12's.. should I cut down the current 8 3/4 diff or go to the common 9" ....This is mainly a visual thing ( big boots) with maybe an odd run down the 1/4. nothing serious..
Cheers FRANKY :?:
I want to go back to Alaska, its too damm hot
Cheers Franky..........
N.T. GASSERS
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Pep
Old Hand
Posts: 4519
Joined: Fri Jun 14, 2002 11:53 am
Location: Georges Hall, NSW

Post by Pep »

Well Franky...I have the Mustang diff in my 34. I was led to believe they were as strong as the 9" but when it developed a clunk going between forward and reverse I took it out. The casing around the planetary gears had broken...I took it to a reputable diff shop and he said they are very weak around the spigot area...I assumed that was where mine had broken. The 34 had 30" high tyres for a long time and he said that would have done it..So he said never to put the boot into it..they will blow up.
See ya on the road or at a run somewhere!
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