upgraded oem parts?

kpeeks · Aug 29, 2014

I've searched around trying to find any info, no luck or I'm using the wrong terms.

I was wondering what parts, if any, did the factory replace with a better quality item. Like wheel hubs, fan clutch, etc. I have an 89 xj & just wondering if better oem parts exist. I'm in the process of swapping my d30 cad to a noncad d30hp. Plan is to swap the diffs out for the gears. This has just been in my head for awhile.

cruiser54 · Aug 29, 2014

You mean like using an 8.25 rear diff and V8 ZJ tie rods and the like?

kpeeks · Aug 29, 2014

Yes. Like were the brakes ever better, besides the wj swap. I know the cooling system was upgraded with the H.O. motors.

cruiser54 · Aug 30, 2014

WJ booster swap is great.

Adding ZJ rear discs to an 8.25 rear end is great also.

ParadiseXJ · Aug 30, 2014

kpeeks said:
I was wondering what parts, if any, did the factory replace with a better quality item.

The FACTORY did not upgrade anything with better parts, that's why it's called factory or "stock" or OEM. Eventually, over the years, the designs, specs, axles, electrics got better but the factory didn't really "upgrade" with better parts. All years have their own pluses and minuses, quirks and gremlins.

Many upgrades are available "aftermarket". If you want to upgrade with better parts, they're out there. Just not from the factory.

cruiser54 · Aug 30, 2014

ParadiseXJ said:
The FACTORY did not upgrade anything with better parts, that's why it's called factory or "stock" or OEM. Eventually, over the years, the designs, specs, axles, electrics got better but the factory didn't really "upgrade" with better parts. All years have their own pluses and minuses, quirks and gremlins.

Many upgrades are available "aftermarket". If you want to upgrade with better parts, they're out there. Just not from the factory.

Well stated.

Goose_XJ88 · Aug 30, 2014

HO D30 brakes were better than the renix era. You can tell the difference by either using a 13mm or 1/2 socket to remove the brakes (HO) or a 7mm allen wrench for a renix.

The abs equipped or 97+ d30s came with the better 297 U-Joints but are direct bolt in to an earlier axle.

97+ mirrors are a direct bolt on (larger and fold out of the way/not spring loaded)

97+ center console is a bolt in with minor tweaks to get the e-brake connected (plus cup holders)

That's all I can come up with for now.

kpeeks · Aug 30, 2014

Thanks ae! I know the factory had to do an upgrade here & there. Like the renix delete of the c101 would be considered a wiring upgrade. The 297x ujoints the next. Just wondering what else may be better from say an 01 vs a 87.

Kittrell · Aug 30, 2014

kpeeks said:
Just wondering what else may be better from say an 01 vs a 87.

Everything besides the head, ignition system, and the exhaust setup is pretty much better on the 2001.

sidewaysstarion · Aug 30, 2014

99+ intake manifold is an upgrade
Later year 8.25's went from 27 spline to 29 spline

ParadiseXJ · Sep 1, 2014

ParadiseXJ said:
Eventually, over the years, the designs, specs, axles, electrics got better

All years have their own pluses and minuses, quirks and gremlins.

What some would consider upgrades, were not necessarily "upgrades". Like ABS e.g.

md21722 · Sep 2, 2014

The 01's do have issues with heads and got low pinion D30's. The coil pack ignition isn't too bad once you get used to it. Though I haven't figured out how to put a timing light on a coil pack. ;^) And while you do have those mini-cats, at least the exhaust manifolds don't crack. Some of the electrical connections are higher grade on the later years. Everyone says the earlier models are less sensitive to driveline vibrations with lift kits.

upgraded oem parts?

kpeeks

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cruiser54

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kpeeks

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cruiser54

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ParadiseXJ

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cruiser54

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Goose_XJ88

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kpeeks

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md21722

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