rear end swap help - TCCoA Forums
 
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post #1 of 10 (permalink) Old 10-05-2011, 12:02 AM Thread Starter
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rear end swap help

would this rear fit my 97 na v6

This 5-lug rear is out of a 1990 Thunderbird sc 5-speed 56,000 miles out of a recked car. It has 2:73 gears and limited slip differential(posi). This rear will fit 1989-1997 Thunderbirds and Cougars (possibly mark viii). The rear has new brake pads and rodars. This is the higher quality 8.8 rear vs. the smaller 7.5 open rears commonly used on less optioned car.
Rear-450

found this ad on craigs

3rd bird I have owned
1st 93 3.8L - Traded in
2nd 97 3.8L sold in divorce
3rd - 97 3.8L - happy to have one back.
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post #2 of 10 (permalink) Old 10-05-2011, 12:12 AM
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Yes it will bolt up, pretty much a good way to get the spider gears meant for IRS limited slip. Also if you can get the SC halfshats to replace your toothpick v6 ones. 2.73 with a v6 is way too sloooow, swap 3.73s. 3.27s are a minimum IMHO. The rear disk brakes are the same except the 90 SC used thicker rotors.

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post #3 of 10 (permalink) Old 10-05-2011, 07:49 AM
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Yes it would work, but as stated, 2.73s are way too low a gear for a 3.8N/A, and that price is a bit steep. Basically the only parts that would be an upgrade on that rear is the differential itself, and the axles. Are you having any issues with your rear right now? If not, I would leave it alone. With a N/A 3.8, you don't have to worry about blowing you rear, and even if you did, it would be cheaper just to swap out the diff and axles, since everything else is the same.

-91 Cougar LS, coming soon, complete overhaul with a 427" Windsor.
-90 XR7 5-speed black on black w/sunroof, MP2, coated rotors, double intercooler, 15%OD, ported heads, comp stage 1 cam, 85mm TB, 90MM LMAF, 80# injectors, and ported big valve heads
-98 Mark VIII LSC, Procharger P600b, TR3650 swap and 3.73s.
-90 SC Automatic rustbucket winter beater
-97 Tbird Sport 4.6 Nice weather daily driver
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post #4 of 10 (permalink) Old 10-05-2011, 10:08 AM Thread Starter
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my rear hums realy bad was told the gears inside it are going i drained the fluid out of it to cheak ind i did find metal shavings in it

and i do plan on putting in a 4.6 at a later point

3rd bird I have owned
1st 93 3.8L - Traded in
2nd 97 3.8L sold in divorce
3rd - 97 3.8L - happy to have one back.
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post #5 of 10 (permalink) Old 10-05-2011, 10:10 AM Thread Starter
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ford thunderbird traction-lok differential 28 spline - $100

would this be a better idea then

3rd bird I have owned
1st 93 3.8L - Traded in
2nd 97 3.8L sold in divorce
3rd - 97 3.8L - happy to have one back.
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post #6 of 10 (permalink) Old 10-05-2011, 10:46 AM
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If that is the complete diff with housing and gears, and if it has 3.27 gears, then yes that would be better. If it is just the trak-lok unit, then it would probably get expensive cause it is probably an 8.8 unit, which would mean you would also need gears and a housing to put everything in. The easiest way would be to find an automatic SC in the junkyard and pull the complete housing out of that, this way you get the 8.8 diff, the 3.27 ratio, and the trak-lok unit all in one already assembled package.

-91 Cougar LS, coming soon, complete overhaul with a 427" Windsor.
-90 XR7 5-speed black on black w/sunroof, MP2, coated rotors, double intercooler, 15%OD, ported heads, comp stage 1 cam, 85mm TB, 90MM LMAF, 80# injectors, and ported big valve heads
-98 Mark VIII LSC, Procharger P600b, TR3650 swap and 3.73s.
-90 SC Automatic rustbucket winter beater
-97 Tbird Sport 4.6 Nice weather daily driver
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post #7 of 10 (permalink) Old 10-05-2011, 03:15 PM
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You sure about swapping a 4.6 in there? What I mean is, have you read about it and know what it requires? And you could also grab any rear end from a v8 bird.

I love my V8, but I'd love it more if all 8 cylinders worked. (they do now)

My T-bird is like George Jetson's wife, you try to give her a little money, she takes the whole wallet.
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post #8 of 10 (permalink) Old 10-05-2011, 06:21 PM Thread Starter
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ya im sure about putting in a 4.6 and ive been reading up on all that it requires
are there any other model of vehicle i can pull a rear out of that will fit with out much work

3rd bird I have owned
1st 93 3.8L - Traded in
2nd 97 3.8L sold in divorce
3rd - 97 3.8L - happy to have one back.
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post #9 of 10 (permalink) Old 10-05-2011, 06:37 PM
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cobra

I love my V8, but I'd love it more if all 8 cylinders worked. (they do now)

My T-bird is like George Jetson's wife, you try to give her a little money, she takes the whole wallet.
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post #10 of 10 (permalink) Old 10-05-2011, 11:38 PM
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I think it'd be far easier and even cheaper to trade or sell the 3.8 bird for a 4.6 bird and start from there. But thats just my opinion.

And I'd definitely do some bargaining to get a good deal on the SC rear end for the fatter half-shafts and 8.8 TL. even if you just hold on to it till you get the 4.6


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