2005-06 Jeep OPDA_CPS_Distributor Failure - Page 231 - JeepForum.com

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post #3451 of 5449 Old 07-16-2012, 06:06 AM
JeepScrap
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Maybe crown should hire stripperguy? Those fools over there have apparently been working on a new unit for a year. Thanks for the dedicated work stripperguy.


"Science will win in a battle with religion because it works." -Stephen Hawking
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post #3452 of 5449 Old 07-16-2012, 06:09 AM
cmecha
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yeah someone should. But i think the real issue is that the part is patented so crown can't make improvements with out infringing on patents. Stripper guy is not selling units, only selling services to Mod them.

"always upgraded, never replaced."
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post #3453 of 5449 Old 07-16-2012, 07:38 AM
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I'm curious if the drive gear is/was used on another model. Would be nice if we could get exact replacements for those. Anybody work at a parts house that could do some research into this?

'85 CJ7, BDS 4" lift, 1" Body lift, 33x12.5, Shrockworks Sliders, 304 V8 with RV cam., T-176, D300, Dana 30, AMC 20.
1986 CJ10-A SD-33 Diesel/727/np208
1971 800B with 345/T-19
06' TJ Rubicon, 4" R.C. springs, BFG/AT 35s M.C. 6" fenders, rockers and surrounds, Currie front & rear adj. tracbars, tattons DC rear shaft, adj. upper - lower CA's. Bilstein 5100's
YJ Buggy Build Current project. Stroker/FI ?
1990 MJ Comanche 4.0L AX15/np231
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post #3454 of 5449 Old 07-16-2012, 07:49 AM
cmecha
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yup wished we could get a bronze drive gear.

"always upgraded, never replaced."
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post #3455 of 5449 Old 07-16-2012, 08:02 AM
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Quote:
Originally Posted by cmecha View Post
yup wished we could get a bronze drive gear.
my understanding is that you dont want the gear to be harder than the cam gear because then the cam gear will wear faster/fail
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post #3456 of 5449 Old 07-16-2012, 08:06 AM
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I thought bronze was softer than the steel the cam gear is made out of ? Learn something new everyday
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post #3457 of 5449 Old 07-16-2012, 08:19 AM
cmecha
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my assumption was bronze was softer than steel as well. or is it brass?

"always upgraded, never replaced."
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post #3458 of 5449 Old 07-16-2012, 08:24 AM
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I thought they both were .
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post #3459 of 5449 Old 07-16-2012, 08:33 AM
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Quote:
Originally Posted by cmecha View Post
my assumption was bronze was softer than steel as well. or is it brass?
Honestly Im not sure...I was actually making a reference about some others that want a harder gear....but in fact I think the brass is softer then the steel
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post #3460 of 5449 Old 07-16-2012, 08:39 AM
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if the ODPA freely spins then there should be very little wear

"always upgraded, never replaced."
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post #3461 of 5449 Old 07-16-2012, 11:50 AM
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Quote:
Originally Posted by BioTex View Post
I'm curious if the drive gear is/was used on another model. Would be nice if we could get exact replacements for those. Anybody work at a parts house that could do some research into this?
Crown makes a replacement that is as close to the OEM as you will get. Since the hole in our shafts is drilled off center & not the same amount from one to another you will not be able to find one that doesnít require some work. That is why replacement gears have only one hole in them. You have to fit them to your shaft & drill the other one. The Crown gear is that way & since it is listed as being for the earlier yrs that had distributors, I assume they had irregular offset holes as well. Donít believe me, try taking the gear from a new OPDA & fitting it to your old one & see if the holes line up. I have 2 & you cannot interchange the gears. Then the only other difference with the Crown gear is you have to tap the wheel down a little to get the recommended end play. I also found it to be a little too tight on the shaft & honed it out a bit but overall consider it to be a good option to complete OPDA replacement if only the gear is bad on the original.

Here is a link to the Crown gear hardness test

http://www.jeepforum.com/forum/f9/ch...ml#post9987898


Here is a link to the simple process for endplay adjustment.
http://www.jeepforum.com/forum/f9/20...l#post11897830

The spec (according to the bulletin) is 0.010" to 0.030"...

Here is a link to my earlier post explaining the gear replacement.

http://www.jeepforum.com/forum/f9/20...l#post12053245



Quote:
Originally Posted by cmecha View Post
yup wished we could get a bronze drive gear.
There is a bronze gear for these. Hesco makes it (#HES29425 $89 as I recall).
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post #3462 of 5449 Old 07-16-2012, 12:02 PM Thread Starter
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Stay away from bronze gears. They are for racing applications where you use them and dispose of them. Bronze is too soft and would be reduced to nothing in short time. If you want to replace the gear, go with Rubi4MyMrs's suggestion and make the Crown gear work. Do not use bronze gears.
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post #3463 of 5449 Old 07-16-2012, 12:04 PM
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Quote:
Originally Posted by Rubi4MyMrs View Post
Crown makes a replacement that is as close to the OEM as you will get. Since the hole in our shafts is drilled off center & not the same amount from one to another you will not be able to find one that doesnít require some work. That is why replacement gears have only one hole in them. You have to fit them to your shaft & drill the other one. The Crown gear is that way & since it is listed as being for the earlier yrs that had distributors, I assume they had irregular offset holes as well. Donít believe me, try taking the gear from a new OPDA & fitting it to your old one & see if the holes line up. I have 2 & you cannot interchange the gears. Then the only other difference with the Crown gear is you have to tap the wheel down a little to get the recommended end play. I also found it to be a little too tight on the shaft & honed it out a bit but overall consider it to be a good option to complete OPDA replacement if only the gear is bad on the original.

Here is a link to the Crown gear hardness test

http://www.jeepforum.com/forum/f9/ch...ml#post9987898


Here is a link to the simple process for endplay adjustment.
http://www.jeepforum.com/forum/f9/20...l#post11897830

The spec (according to the bulletin) is 0.010" to 0.030"...

Here is a link to my earlier post explaining the gear replacement.

http://www.jeepforum.com/forum/f9/20...l#post12053245





There is a bronze gear for these. Hesco makes it (#HES29425 $89 as I recall).
Thanks for all that info. I knew about the crown gear and having to drill the hole, but I admit I didn't know the whole story. Now I do.

'85 CJ7, BDS 4" lift, 1" Body lift, 33x12.5, Shrockworks Sliders, 304 V8 with RV cam., T-176, D300, Dana 30, AMC 20.
1986 CJ10-A SD-33 Diesel/727/np208
1971 800B with 345/T-19
06' TJ Rubicon, 4" R.C. springs, BFG/AT 35s M.C. 6" fenders, rockers and surrounds, Currie front & rear adj. tracbars, tattons DC rear shaft, adj. upper - lower CA's. Bilstein 5100's
YJ Buggy Build Current project. Stroker/FI ?
1990 MJ Comanche 4.0L AX15/np231
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post #3464 of 5449 Old 07-16-2012, 12:07 PM
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I completely agree with willy about the bronze gear. I was just pointing out that one exists.
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post #3465 of 5449 Old 07-16-2012, 12:19 PM
cmecha
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did not know that a bronze gear would be eaten up.

"always upgraded, never replaced."
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