3rd member swap
Fleet Owner
Joined: Dec 2009
Posts: 20,678
Likes: 83
From: NorCal
A non-LSD center section can also simply be upgraded with an LSD like a Traction-Loc unit to which the ring gear is bolted to....
Lead Driver
Joined: Apr 2011
Posts: 6,399
Likes: 40
From: El Dorado, Arkansas
It could be accomplished one of two ways. You could swap the differential into your trucks existing 3rd member/rear end housing or, you could swap out the entire 3rd member in your existing rear end housing for one that has a Traction-Lok differential in it. --differentials/axles could be either 28-spline or 31-spline so, know what you have and what you're getting.
Cargo Master
Joined: Oct 2010
Posts: 2,674
Likes: 16
From: Ideeho
Not trying to insult you or anything, but do you for sure understand how gearing works? If you have 3.00's and are going to a 2.75.........but wish you had 3.70's.......I don't think you will like the results. Numerically lower means mechanically higher gears.
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Elder User
Joined: Feb 2015
Posts: 676
Likes: 0
From: south east kansas
oh i know thats why i would like the 3.70, it would accelerate faster and launch harder. i have to go to the 2.75 because my 3.00 case is leaking do to a crack, and the 2.75 is all i have. i know that a 2.75 would probably be more wise in terms of highway driving, but in terms of a "Street truck" a 3.70 posi would be more "wise".
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Elder User
Joined: Feb 2015
Posts: 676
Likes: 0
From: south east kansas
no offence taken. i found out about gears the first hand in a sense, my buddy's chevy has 3.08's in it and with 29" tires he gets decent highway, his dad has a 81 Malibu wagon with 4.10's and 29" tires i think he is roughly 65ish mph at 3000rpm...
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Elder User
Joined: Feb 2015
Posts: 676
Likes: 0
From: south east kansas
, its not but i'm useing the drive shaft that came out of the truck that the third member came out of. 5 pints i though quarts... so i have 3 extra bottles.
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Elder User
Joined: Feb 2015
Posts: 676
Likes: 0
From: south east kansas
so now that i have changed driveshaft and 3rd member out something is squeaking, it had done it with the old driveshaft i assumed that a u joint was going bad , now that the "new" driveshaft is in it is squeaking i think it may have a bad u-joint as well. could something else be squeaking? it was a 2 piece driveshaft with the small ujoint , the new is a one piece with the bigger size u-joints.
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