3.73 gear swap - any FYI's to know about? - Page 2 - MustangForums.com



V6 (1994-2004) Mustangs Technical discussions on the 3.8L and 3.9L V6 torque monsters

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Old 06-03-2013, 05:34 PM   #11
Toadster
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Quote:
Originally Posted by jthorn9 View Post
Tlock in a 7.5" rear for $700 = money up in smoke = paperweight
the open diff on our car has 146k miles on it so far... still going

why a paperweight? it's not like we're going to put a 175-shot of nitrous on this car
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Old 06-03-2013, 06:40 PM   #12
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Because the Tlok is very famous for failure under stock loads. It's not a very well constructed differential.
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Old 06-06-2013, 02:07 AM   #13
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I had 4.10s and my diff blow after about 75,000 miles on it. I changed to 3.73. Slow, can't spin the tires as easy, but its still quick and I got a boost in mileage of about 4-5 mpg over my 4.10s.
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Old 06-06-2013, 05:47 PM   #14
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I had 4.10s and my diff blow after about 75,000 miles on it. I changed to 3.73. Slow, can't spin the tires as easy, but its still quick and I got a boost in mileage of about 4-5 mpg over my 4.10s.
holy crap - what MPG were you getting with 4.10s?
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Old 06-06-2013, 09:39 PM   #15
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holy crap - what MPG were you getting with 4.10s?
With everything else i had on the car, i was getting about 10-11 mpg. Now im getting close to 14-15
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