Re-gearing axles

[Matt]

Just read that over and wanted to clarify a bit... since i think we're both actually on the same page.

My main point was if you're running 32s or smaller on these vehicles and have to pay full price to re-gear ($1500 in my area), the jump from 3.73s to 4.10s really isn't worth the cost. I've done a lot of work in this area and just wanted to point out that the difference between those gears will barely be felt in the butt dyno... so if someone read this thread and then dropped $1500 on a 4.10 gear set, i'd feel bad when they're gravely disappointed in the mediocre results.

But like you said... if 4.10s are all that's available and you can get them installed for a good price, then every little bit helps. From my personal experience, i wouldn't put more than $500 into that change for 32" tire on these vehicles.

.... if 4.30s or 4.56s were available, we wouldn't even be having this discussion

[Sal-XK]

I have a question since I think you two can answer with experience and knowledge not just a guess. Since it seems the 8.25 27 spline has more options to it instead of our 29 spline. How hard or even possible would it be to put the change the spline out and drop down to the 27?

[07JeepXK]

Just read that over and wanted to clarify a bit... since i think we're both actually on the same page.

My main point was if you're running 32s or smaller on these vehicles and have to pay full price to re-gear ($1500 in my area), the jump from 3.73s to 4.10s really isn't worth the cost. I've done a lot of work in this area and just wanted to point out that the difference between those gears will barely be felt in the butt dyno... so if someone read this thread and then dropped $1500 on a 4.10 gear set, i'd feel bad when they're gravely disappointed in the mediocre results.

But like you said... if 4.10s are all that's available and you can get them installed for a good price, then every little bit helps. From my personal experience, i wouldn't put more than $500 into that change for 32" tire on these vehicles.

.... if 4.30s or 4.56s were available, we wouldn't even be having this discussion

I hear you. The only way I would consider putting 4.10's in is if there is no chance they would ever make any other gears. Cause If I had the choice, id definately go with 4.56's due to future plans.

I have a question since I think you two can answer with experience and knowledge not just a guess. Since it seems the 8.25 27 spline has more options to it instead of our 29 spline. How hard or even possible would it be to put the change the spline out and drop down to the 27?

Im not sure why you would want to do that? What are you trying to buy for your rear axle that you cant find in a 29 spline? A 29 spline 8.25 is going to be a hair stonger then a 27 spline for obvious reasons. They make differential covers and an ARB for the rear. What more do you need?

[Matt]

I have a question since I think you two can answer with experience and knowledge not just a guess. Since it seems the 8.25 27 spline has more options to it instead of our 29 spline. How hard or even possible would it be to put the change the spline out and drop down to the 27?

Honestly im not sure... i haven't done much work with these particular axles.

I can't believe how little aftermarket there is for these things

I recently came in contact with an employee at a [somewhat] local dealer that specializes in aftermarket equipment for jeeps, including gear changes.... i'll have to get a hold of her to see if she knows anything about more gear options for these axles.

[Sal-XK]

Just thinking outside the box since all those gears listed on the site in the OP were for the 27 spline. Just brain storming

[bigmaninds]

I called this place called Randys Ring & Pinion and they say they have gears for the Commander front and rear. They send me an email with gears (4.56) and the master install kit. They say it will run 900 for all of the parts. Any thoughts? I plan to order them next week. They guarantee this will fit.
This quote was prepared for you by:
Allen Booher
+1(425)347-1199
ext. 5570
Please call me directly at the above extension to finalize this order.

Quoted Parts List:
Qty Part # Description Price Ext
------------------------------------------------------------------------
1 YG C8.25-456 8.25 CHY 4.56 R&P (_ $349.38 $349.38
1 ZG C8.0-456 8.0IFS CHY 4.56 R&P $190.88 $190.88
1 YK C8.25-B '76 & UP CHY 8.25" M $116.32 $116.32
1 YK C8.0-IFS-C '03 & UP 8.0IFS CHY $285.73 $285.73
------------------------------------------------------------------------
Subtotal: $942.31
Shipping TBD

Thoughts?

[Matt]

You may want to call them back up... as far as I know, no one makes gears for the Chrysler C200F (C200FE for QDII) front diffs which are really 7.875 (7.9"), not the 8.0IFS that they listed for you.

Our rear is the 8.25"... Code C213R (C213RE for QDII)

[pjmjr508]

also if you guys want I can go by there as well, I live in the same cit; this way they can look at mine to confirm as I have QDII. Plus I will check with a friend from work on monday, he use to work there.

[Sal-XK]

Another reason to have the QT2 you have options with this system J/K. I think with the bigger tires were running if gears were available for less then 1k that will be my next mod after rock rails the running boards are almost in my door so they need to come off.

[Tymac]

I'm only commenting of the rear diff.

I've seen a couple of complete Dana 44's out of wrecked Commanders go locally for $250. Install kit is $110 and gears for a 44 are $150. Plus you have the benefit of a stronger rear.