- Hey guys, what would be the best way to convert my open Diff to LSD? I have the 9.25 axle with the 3.55 gears but open. I have searched everywhere for another 03 axle with Trac Loc but have got nothing. I don't want to lose disc brakes so how else can I convert it? I know I can probably just change out the assembly but I have no idea where to start or what to what to look for to find a compatible assembly. Thank you in advance!
Open Diff to LSD
BackTrakt
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- Hey guys, what would be the best way to convert my open Diff to LSD? I have the 9.25 axle with the 3.55 gears but open. I have searched everywhere for another 03 axle with Trac Loc but have got nothing. I don't want to lose disc brakes so how else can I convert it? I know I can probably just change out the assembly but I have no idea where to start or what to what to look for to find a compatible assembly. Thank you in advance!
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BT:
I agree that you ought to hang onto the oem housing to keep the rear disc brakes. Since you have the 9.25 housing, your D is either RWD or part time 4x4. You could add the Dodge Anti-Spin carrier, but that requires the ability to swap out the open carrier, and reset the shims if needed. The Dodge LS unit also had some issues, so an aftermarket unit like Auburn or similar would be better, and bit more money.
There is also a device called Power Trax that can be installed without removing the carrier.
What is your goal in adding the LS carrier? Do you off road on a regular basis?
Don
I agree that you ought to hang onto the oem housing to keep the rear disc brakes. Since you have the 9.25 housing, your D is either RWD or part time 4x4. You could add the Dodge Anti-Spin carrier, but that requires the ability to swap out the open carrier, and reset the shims if needed. The Dodge LS unit also had some issues, so an aftermarket unit like Auburn or similar would be better, and bit more money.
There is also a device called Power Trax that can be installed without removing the carrier.
What is your goal in adding the LS carrier? Do you off road on a regular basis?
Don
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Awesome thank you so much! I'm gonna do some research on changing the carrier, but do you know if I'd need any special tools? And I have the RWD model and have friends that live on sugar sand roads. I also wanted to do it for the performance aspect, I plan on building up the engine and maybe throwing on a procharger in the future. So I figured I'd make sure the rest of the truck can handle the power first.
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What do you mean by more positive? Also I wanted to switch to 3.92 gearing but to my understanding the spline count is 31. I can't find 3.92 gears with 31 splines anywhere, only 29?
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BT:
I believe the spline count refers to the axles which would go into the spider gears, or the power trax unit. As far as the gearing goes, with RWD you could go with 3.92, or 4.10. The gear swap does require special tools, and the knowledge of how to set the pinion depth and backlash.
Don
I believe the spline count refers to the axles which would go into the spider gears, or the power trax unit. As far as the gearing goes, with RWD you could go with 3.92, or 4.10. The gear swap does require special tools, and the knowledge of how to set the pinion depth and backlash.
Don
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Do you think 4.10 would be too tall for daily driving? But I'll do a bunch of research. I try do to whatever I can myself, but I know when to get an expert lol
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Should have asked this before now, but do yo have the 4.7 or 5.9 engine? Numercially, there isn't a huge difference between 3.92, and 4.10. Switching to either one will boost your cruising rpms a couple hundred. Where you will see the difference is in taking off from a stop. You won't have to hit the gas quite as hard to get going, and engine rpms will get to the power band more quickly.
An important note should you have the 4.7 engine, is that your trans is a 5 speed. That 5th gear will temper the change to the shorter gear at highway speeds, so you won't notice the gear swap as much on the highway as you would with the 4 speed that comes with the 5.9.
Don
An important note should you have the 4.7 engine, is that your trans is a 5 speed. That 5th gear will temper the change to the shorter gear at highway speeds, so you won't notice the gear swap as much on the highway as you would with the 4 speed that comes with the 5.9.
Don
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That makes sense thank you! I have the 5.9, so I'm thinking I might as well go with the 4.10. I figure it should also help with carrying my detail equipment for when I do detailing on the side.
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Sounds good. Know that swapping the gear set will jump the bill up quite a bit. My guess would be $12-$1500 part and labor. The 4x4 folks get to spend about twice that, as the front gear set has to be changed as well.
I know of two Gen 2 D owners with RWD and the 4.7 engine that made the 3.55 to 4.10 swap. They were both very pleased at how it turned out.
Don
I know of two Gen 2 D owners with RWD and the 4.7 engine that made the 3.55 to 4.10 swap. They were both very pleased at how it turned out.
Don
1. Power Trax works by using a solid ratchet style locking system rather than clutch plates so that there is no slippage. 2. As far as splines go for the axles, I never ran into a problem with spline match. if it comes with 31 spline set-up,, go to Moser axle and order a set for the9.25. 3. with 3.92 gears and a 5.9 you'll average @ 12 MPG, less with 4.08 (next available size) and as mentioned you'll need 2 sets on a 4x4.
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