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Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > ZJ Grand Cherokee Forum > BB spacer measurments.

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Unread 08-23-2013, 07:29 PM   #1
thudsonjr
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1995 ZJ 
 
Join Date: Apr 2012
Location: Ankeny, Iowa
Posts: 22
BB spacer measurments.

Could someone measure their BB spacers? I need diameter, and the size of the hole in the middle. And the amount of cutout for the rear spacer (on the side). I'm trying to have a guy make mill me some out of aluminum

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--1995 ZJ- 4.0L, 300000+ miles (i think) 265-75r15 tires, Aero race wheels, no lift
--1996 BMW 328is-intake, exhaust, H&R lowering springs, 17x8 ASA wheels(painted white)
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Unread 08-23-2013, 08:04 PM   #2
NinetySevenZJay
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why do u want aluminum? poly is much better and wont rust, bend/dent, or squeak. plus they're cheap
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Unread 08-23-2013, 08:05 PM   #3
AnotherRedZj
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Jus buy a BB for like $60
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Unread 08-23-2013, 08:16 PM   #4
thudsonjr
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Well I figured I'd let my friend get some practice at the same time
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--1995 ZJ- 4.0L, 300000+ miles (i think) 265-75r15 tires, Aero race wheels, no lift
--1996 BMW 328is-intake, exhaust, H&R lowering springs, 17x8 ASA wheels(painted white)
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Unread 08-23-2013, 09:00 PM   #5
Cherokee95kid
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1995 ZJ 
 
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Metal budget biosts will end up doing damage to the spring perch that's why they are poly because thy absorb the abuse the springs put on the perch.
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Unread 08-24-2013, 11:22 AM   #6
StellaTheZJ
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Quote:
Originally Posted by Cherokee95kid View Post
Metal budget biosts will end up doing damage to the spring perch that's why they are poly because thy absorb the abuse the springs put on the perch.
Interesting opinion... tell me, I've been using Aluminium spacers for about 20 years now, on two Jeeps (XJ/ZJ), with over 250,000km combined mileage. At what point should I start looking for this damage?

I cut a piece of inner tube rubber to put between the spacer and the perch, and then reused the stock isolator between the spacer and the spring. No problems I've ever seen.

Here are some specs I found for ya. Mine actually have a taper turned into them to transition between the two IDs, which more closely mimics the shape of the spring perch, but I'm sure these'll work great too:



I got these specs from an INSANE facebook page on incredible XJs. A lot to learn from the pics on there!!!

https://www.facebook.com/pages/Jeep-...32229476843194
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Unread 08-24-2013, 11:27 AM   #7
thudsonjr
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So those there are a 70mm lift and the inside taper is from 65mm to 54mm? Why is there the 20 mm area where it is bigger? I've never seen that before
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--1995 ZJ- 4.0L, 300000+ miles (i think) 265-75r15 tires, Aero race wheels, no lift
--1996 BMW 328is-intake, exhaust, H&R lowering springs, 17x8 ASA wheels(painted white)
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Unread 08-25-2013, 08:51 AM   #8
bigfoot493
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here post #12

http://www.jeepforum.com/forum/f9/ho...anyone-973645/
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Unread 08-25-2013, 01:47 PM   #9
PolkaPower
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I just took some Daystar spacers out I can sell you PM if you are interested.
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