Adding Limited Slip

[G Gerard]

I have a 22 bighorn that I purchased from a relative. For some reason he ordered it with an open differential. the gear ratio is 3:21.
I want to add a Detroit (Eaton) Truetrac. A local mechanic I spoke to told me its a rabbit hole if I do this because there is no guaranty it wont affect the gear ratios between the rear and front end. That does not make sense to me. Are there any experts here that can clarify if this will be can of worms? Thank you all.

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[MannyN]

It's just a locker or limited slip. As long as you gear ratio is the same, there is no problem adding one. A locker does not change gear ratios. You keep your ring gear and pinion from the old differential.
Here is some info on the locker.

https://www.eaton.com/us/en-us/skuPage.917A730.html

 

[1791]

so a 4wd with a open diff?? just swapping the entire rear out would be the way i would go 4wd or not.
that mechanic is wacked and don't let him near your truck

 

[G Gerard]

It's just a locker or limited slip. As long as you gear ratio is the same, there is no problem adding one. A locker does not change gear ratios. You keep your ring gear and pinion from the old differential.
Here is some info on the locker.

https://www.eaton.com/us/en-us/skuPage.917A730.html

Thank you Manny.

 

[G Gerard]

so a 4wd with a open diff?? just swapping the entire rear out would be the way i would go 4wd or not.
that mechanic is wacked and don't let him near your truck

Good advice!

 

[Scram1500]

I have a 22 bighorn that I purchased from a relative. For some reason he ordered it with an open differential. the gear ratio is 3:21.
I want to add a Detroit (Eaton) Truetrac. A local mechanic I spoke to told me its a rabbit hole if I do this because there is no guaranty it wont affect the gear ratios between the rear and front end. That does not make sense to me. Are there any experts here that can clarify if this will be can of worms? Thank you all.

​

3.21 is equal to 3.21. The local mechanic is nuts.

 

[G Gerard]

3.21 is equal to 3.21. The local mechanic is nuts.

There is likely a reason I only see him at the cafe, and not in his shop.

 

[Jupiter58]

There is likely a reason I only see him at the cafe, and not in his shop.

If you have the time and tools and space put it in yourself. Pretty straightforward, not like replacing gears and having to set backlash and such.


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