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  #1  
Old 04-06-2018, 05:21 PM
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Default 8.8 diff install

hi guys.. putting a 8.8 diff into 1960 tbird,, because of the offset of leaf springs is their any percautions I need to know ? ie spring perches offset/pinion angle pre set when welding new perches.. hope this makes sense .... do I square off the raer end and go?? any heads up is appreciated... thanks
Tom
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Old 04-06-2018, 06:19 PM
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Originally Posted by TOM1960SQUAREBIRD View Post
...because of the offset of leaf springs is their any percautions I need to know ?..
Most of the 8.8" rear ends I've met are set up for coil springs. I don't know what yours came out of but the swap is pretty straight forward.

When you relocate your perches there will be no offset. Simply maintain the same axle angle as your trans tail-shaft. - Dave
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Old 04-06-2018, 07:00 PM
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Originally Posted by simplyconnected View Post
Most of the 8.8" rear ends I've met are set up for coil springs. I don't know what yours came out of but the swap is pretty straight forward.

When you relocate your perches there will be no offset. Simply maintain the same axle angle as your trans tail-shaft. - Dave
Maybe he is doing an 8.8 out of an explorer that is an old school iron straight axle?

I have a few Mustang Cobra 8.8s laying around, I have thought about swapping the whole cradle into my TBird, but that's as far as I've got.... thought about it...
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Old 04-06-2018, 11:55 PM
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No doubt Bryan, the 8.8 was used in many lines of cars and trucks. I've only had cars so I'm limited.

SN95 T-birds and Mustangs were graced with 8.8 rear ends, very successfully. The Cobra cradle was an independent suspension version that was cleverly done. I never thought about retrofitting it to a Squarebird but hey, why not? They even have disk brakes in the assembly!
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Old 04-09-2018, 12:54 PM
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Just a note: If you are changing to the 8.8 due to a belief that it may be a "better" engineered unit, it's not!

Scott.
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Old 04-09-2018, 03:51 PM
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Originally Posted by simplyconnected View Post
No doubt Bryan, the 8.8 was used in many lines of cars and trucks. I've only had cars so I'm limited.

SN95 T-birds and Mustangs were graced with 8.8 rear ends, very successfully. The Cobra cradle was an independent suspension version that was cleverly done. I never thought about retrofitting it to a Squarebird but hey, why not? They even have disk brakes in the assembly!
Yes, the Cobra rear end cradles I have are complete units, have disc brakes, anti roll bars, shocks, the whole thing. With a limited slip geared at 3.56...

I'd post a photo.... but to much effort anymore
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Old 04-12-2018, 08:30 AM
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One thing I would not do is set the diff angle exactly the same as a 9. The nine has one of the lowest pinions on the planet. Probably at least some change in driveshaft angle, vs diff angle between the two.
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Old 04-12-2018, 11:24 AM
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The nine has one of the lowest pinions on the planet.
And due to such, is where much of the greater strength within the ring & pinion relationship vs. say, the 8.8 resides.

Scott.
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Old 04-12-2018, 04:03 PM
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And due to such, is where much of the greater strength within the ring & pinion relationship vs. say, the 8.8 resides.

Scott.
No doubt. Unfortunately, the stock 9" cases were weak in the 3rd pinion bearing area and that little chunk liked to crack off and test the strength of the rest of it.

Had a whole bunch of them on all my 78/79 broncos, think I broke every one of them in some fashion before moving to a D60, then 14 bolt, and then Unimog axles finally.

http://i.imgur.com/OZnj8.jpg
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Old 04-12-2018, 04:44 PM
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That's a nasty gear. Are these Ford gears?
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