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Old 04-14-2011, 08:02 PM   #1
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8.8 rearend

Im going to pick up an 8.8 sunday to install in the rear of my YJ. Its coming out of a 97 explorer. The guy said he thought it had 340 something gears in it. I was wondering how it worked with the carriers in them. I want to install 4.88 gears in it. Is the carrier big enough or would I need to buy something else. Thanks in advanced.

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Old 04-14-2011, 08:12 PM   #2
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I think most had 3.73 or 4.10/11'. As for the carrier not sure what the break is.

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Old 04-14-2011, 08:20 PM   #3
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To the best of my knowledge I think that they will fit. I was told that all ratios will work on stock carriers
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Old 04-14-2011, 09:37 PM   #4
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Thanks for the info. One more question, would it be better to buy one of those axle swap kits or should I just grind the perches off and reweld them and find my own spring plates and u bolts. I already have some shock mounts to weld on it.
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Old 04-15-2011, 09:18 AM   #5
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Originally Posted by black94yj View Post
To the best of my knowledge I think that they will fit. I was told that all ratios will work on stock carriers
You might want to check. I have read with the Dana 35, if you have gears below 3.73 you have to get a new carrier for the lower gears. I know that is a dana and not the 8.8, but you might want to look into it a little farther.
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Old 04-15-2011, 10:57 AM   #6
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^^^^^^^^8.8 carrier will be fine 3.40 or 5.13 the worst thing is that you will have to modify the cross shaft to get it out. A little flat in the shaft.
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Old 04-15-2011, 08:26 PM   #7
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What do you mean by modify the cross shaft.
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Old 04-18-2011, 10:08 AM   #8
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I think you have to flatten down one side so you can slide it back in when the lower gears are installed. I think the teeth on the ring gear stick out too far. I just bought an 8.8 and plan to put 4.56's in it. From what I've read, there is no break in the carrier like there is in the D30... not sure about the D35. Don't quote me on this but I think you can buy a "modified" cross shaft on the cheap. Still looking for one but I thought I saw one on Randy's website.
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Old 04-28-2011, 01:12 PM   #9
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you can go to Randy's Ring & Pinion. The Differential Experts. Auto Parts & Services. they will have all the gears that you can get for a 8.8 i was looking on there and i never saw anything about moding anything in the diff. all you are doing when you re-gear is changing the # of teeth it should not increase the dia of the ring gear.
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Old 04-28-2011, 01:20 PM   #10
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I think you have to flatten down one side so you can slide it back in when the lower gears are installed. I think the teeth on the ring gear stick out too far. I just bought an 8.8 and plan to put 4.56's in it. From what I've read, there is no break in the carrier like there is in the D30... not sure about the D35. Don't quote me on this but I think you can buy a "modified" cross shaft on the cheap. Still looking for one but I thought I saw one on Randy's website.
Don't modify the shaft, just take a dremel and knock down the inside of the tooth that is in front of the shaft hole on the ring gear so that the original, unmodified shaft will slide in like normal.
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Old 04-28-2011, 01:21 PM   #11
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you can go to Randy's Ring & Pinion. The Differential Experts. Auto Parts & Services. they will have all the gears that you can get for a 8.8 i was looking on there and i never saw anything about moding anything in the diff. all you are doing when you re-gear is changing the # of teeth it should not increase the dia of the ring gear.
The diameter of the ring gear may not change...but the thickness does.
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Old 04-28-2011, 04:20 PM   #12
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Don't modify the shaft, just take a dremel and knock down the inside of the tooth that is in front of the shaft hole on the ring gear so that the original, unmodified shaft will slide in like normal.
Why would you mess with the integrity of a tooth over taking a little out of the shaft! That makes no sense
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Old 04-28-2011, 04:23 PM   #13
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Why would you mess with the integrity of a tooth over taking a little out of the shaft! That makes no sense
Knocking off the corner of the tooth of the ring gear wont affect it in the slightest because if your gears were meshed right...that edge of the ring gear never gets touched...ever. This is also the easiest method in most cases.
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Old 04-28-2011, 04:45 PM   #14
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Read this...then let me know what you think.

Randy's Ring & Pinion.
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Old 04-28-2011, 07:24 PM   #15
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The knotched cross shafts are famous for breaking
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Old 04-28-2011, 07:24 PM   #16
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Read this...then let me know what you think.

Randy's Ring & Pinion.
Good article. I guess both will work just fine. Never wanted to mess with the gear. Old dog new tricks
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Old 04-28-2011, 07:34 PM   #17
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The knotched cross shafts are famous for breaking
So I have heard. It also seems like it would take longer to install them along with ever having to remove C-clips.
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Old 04-28-2011, 09:02 PM   #18
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It also seems like it would take longer to install them along with ever having to remove C-clips.
The cross shafts are easy to install. Only one bolt that holds it, doesnt matter if you grind a tooth, grind the pin or have the knotched pin. Then theres always c-clip eliminators.
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Old 04-28-2011, 09:20 PM   #19
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Quote:
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The cross shafts are easy to install. Only one bolt that holds it, doesnt matter if you grind a tooth, grind the pin or have the knotched pin. Then theres always c-clip eliminators.
I know how a cross pin goes in. A new notched pin WILL take longer to install though if you do not grind a tooth down. The purpose of the notched pin makes it possible to remove the c clips without ever removing the cross shaft.

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