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Old 05-14-2019, 06:41 AM   #1
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Default Question about Locking Diff and Underdrive

I've got a TRX4 Sport, and my friend has a TRX4 Defender. His has locking diffs, mine doesn't.

He wants a locked front diff and i want a locking/unlocking rear.

So, my question is:

Can i remove his front diff, and use it in my rear axle with my underdrive gear? Hope that makes sense. I did do a search but couldn't find a definitive answer
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Old 05-14-2019, 08:11 AM   #2
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Default Re: Question about Locking Diff and Underdrive

Can’t think of any reason as to why this wouldn’t work, thinking you’ll be good to go
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Old 05-14-2019, 09:08 AM   #3
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Default Re: Question about Locking Diff and Underdrive

Great, thanks. I suspected as much, but don't yet have his axle to take apart
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Old 05-14-2019, 09:32 AM   #4
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Default Re: Question about Locking Diff and Underdrive

You will each have the best of both worlds. The front never gets unlocked on mine but the rear gets opened often as needed.
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Old 05-14-2019, 09:49 AM   #5
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Default Re: Question about Locking Diff and Underdrive

The only issue you might have is that the rear cable is longer than the front so you may need to buy a rear cable. You will also need a transmitter that can control that channel. The Sport TQ transmitter will not work for this.
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Old 05-14-2019, 10:04 AM   #6
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Default Re: Question about Locking Diff and Underdrive

Aah good point. Although I'll be relocating the servo so could just move it to suit the front cable I guess.
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Old 05-14-2019, 02:22 PM   #7
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Default Re: Question about Locking Diff and Underdrive

Quote:
Originally Posted by neilus View Post
Can i remove his front diff, and use it in my rear axle with my underdrive gear? Hope that makes sense.
Yes.

Quote:
Originally Posted by Inspector86 View Post
The only issue you might have is that the rear cable is longer than the front so you may need to buy a rear cable. You will also need a transmitter that can control that channel. The Sport TQ transmitter will not work for this.
Yes.

As OP stated, moving the locker control servo may negate need for different difflock cable.
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Old 05-14-2019, 03:49 PM   #8
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Default Re: Question about Locking Diff and Underdrive

Quote:
Originally Posted by Natedog View Post
Yes.



Yes.

As OP stated, moving the locker control servo may negate need for different difflock cable.

Thank you for confirming that. He's coming over in the morning for us to do the swap
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Old 05-23-2019, 11:44 AM   #9
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Default Re: Question about Locking Diff and Underdrive

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Originally Posted by neilus View Post
Thank you for confirming that. He's coming over in the morning for us to do the swap
How did it go???
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