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Eleventeenth Gear Poster
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I installed my FRPP 3.73 rear end this afternoon and once I had the rear up on jack stands I spun one of the rear wheels to see if my e-brake was on. Well it wasnt on and when I spun the wheel the other spun the oppsite way....WTF! Can the TL portion of the rear go bad without any indication? I never felt or heard anything weird from that area. I have an E under AX on the door jam and once I had the old pumpkin out I saw the tag on it read 3L27. Could the car and pumpkin have been tagged wrong?

I'm glad the e-brake wasnt on and I found that out because my old pumpkin was going to Tim B. I he had gone throught all the work to put that in and it didnt have TL I would have felt like and A$$.
 

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02 Explorer Pioneer
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2,880 Posts
Yes the clutch packs can wear out or even the S sping that pushes against them can break. I'm still interested I'll just open it up and see what's inside
 

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437 Posts
Aaron K. said:
I installed my FRPP 3.73 rear end this afternoon. I spun one of the rear ......and the other spun the oppsite way
Are you referring to the Old diff. or the new one? What you describe is exactly what an OPEN diff. should do. It's also what a trashed Trac-Loc will do! I've trashed 2 Trac-Locs, so I know what I'm talking about. With the first one, there was Nothing left of the friction or seperator plates, except magnetic sludge! The second one was all there, just the friction plates were completely worn out.

I saw the tag on it read 3L27. Could the car and pumpkin have been tagged wrong?
Yes that's entirely possible. The tag decodes as a 3.27 Trac-Lok.

68COUGAR
 

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Aaron K. said:
I have an E under AX on the door jam and once I had the old pumpkin out I saw the tag on it read 3L27. Could the car and pumpkin have been tagged wrong?
It's definitely a 3.27 Trak-lok rear... but they need frequent fluid changes ( I saw one Ford Spec say 100,000 miles!), otherwise they start working like a 1 wheel peel. My 95 went about 50k before it acted up, then about 50k more before it did it again. I'll be changing the one I install in the 97 at 25k intervals. Sounds like your axle needs a T-lok kit before it's reinstalled.
 

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Confirmed V6 Nut
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2,261 Posts
What fluid is recommended for a traclok pumpkin?
 

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Refrigerator Raider Hater
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11,719 Posts
gear oil and friction modifier. The ford spec is 80w90. If you off by 5 on either number it's no biggie.
 

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Super Moderator
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11,415 Posts
Hmmm.
44520


Red Cougar, black cougar, Tbird.
Tbird is open, red Cougar isopen, Black Cougar is a Locker, Lazarus has ehe0157 package, making it a "sport, but it only has the sway bar and locker.

All now have Sport springs; Red cougarhad a 308 added after the bad vibration problem I had with the driveshaft. was swapped into the tbird, after rebuild.

44521


44522
 

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I'm relatively new to the Trac-lok's, but I'm not impressed. The one in my T-Bird has about 10k on it, and it rarely leaves two tracks. I was playing the other day on a hill when it was wet out. I had it nailed in 2nd gear, and expected it to fishtail some, but it just spun the right tire about 100 ft.

I did a little brake torque in our CVPI with 98k miles. Although I could feel a good push from the rear, it only left the right track. It used to leave two.

I used to have old Mopars, and an old Sure Grip would still spin both. The Ford Trac-lok fk'n sucks!

Al
 

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Administrator
1994 Cougar XR7 DOHC/5-Speed
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19,491 Posts
They work better with the extra clutches/alternate stacking sequence. I agree, Trac Lok leaves a lot to be desired. When I rotated my tires last week I noticed the right rear tire seemed to be getting a lot more use than the left one

And yeah two wheel peels are perfectly possible with open differentials, it’s all dependent on the right set of circumstances
 

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109 Posts
I'm on my second Thunderbird. The first one committed suicide (hydroplaned on a wet freeway) but it had a Trac-Lok from the factory. It never felt like it was really working right, to the point that I got it rebuilt eventually with a new clutch pack kit from Ford. Better, but not great. After the accident I bought a replacement Thunderbird (same year, '95) and decided to hell with that S-spring noise, got a Truetrac instead (I don't think the replacement Thunderbird had limited slip, anyway). Helical gear design, works more consistently and I've heard about them a lot lately in many of the car shows I like to watch (Motortrend channel), they swap them in for many rearends. Nothing to wear out.
 
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