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Old 09-19-2012, 09:10 AM   #1
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Another S35 or D44 or F8.8 Question

I am new to tj's and am wondering what my best option would be with the 2.5l AX5 combo with 33's on the street and 35-36 Pitbull Rockers offroad. Mostly sand/log hills with some mud. Very occasionally some boulder piles\hills. Think Trollhaugen in Dresser, WI or Apple Valley Farms in Chetek, WI. I searched and everything seemed to be about 4.0l and major rock crawling. I am just planning stage now but am looking at 2.5" lift with metal cloak arched fenders and 4.88 gears cuz i just got a non-disco hp30 housing out of a xj. I also will be getting an ARB in whatever i go with. Thanks.

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Old 09-19-2012, 09:18 AM   #2
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oh, and cash is not a huge concern because the s35 is around 2000 installed w\ gears and the d44 and f8.8 are around 3000 shipped to my door. But i believe the driveshaft would need to be addressed or would my stock one work?

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Old 09-19-2012, 09:39 AM   #3
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If cash is not a concern, the 8.8 is your strongest option...unless the 44 you are looking at is an aftermarket company that has built it up. The driveshaft for a 8.8 may or may not need to be addressed...same goes for the 44 I believe, however I dont think you will know until you get the axle under there.
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Old 09-19-2012, 09:53 AM   #4
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Yeah the d44 is the superior built one from quadratec with 33 spline shafts and disk brakes. The f8.8 I would be getting from ecgs. What kind of ground clearance loss am I looking at with the d44 and f8.8? Also I heard with the f8.8 that if/when I get a sye it will need different brackets???
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Old 09-19-2012, 10:15 AM   #5
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Yeah the d44 is the superior built one from quadratec with 33 spline shafts and disk brakes. The f8.8 I would be getting from ecgs. What kind of ground clearance loss am I looking at with the d44 and f8.8? Also I heard with the f8.8 that if/when I get a sye it will need different brackets???
I think the 8.8 hangs a little lower than both the 44 and the 35...I think the 44 is pretty close to the 35 though. As far as needing different brackets...I do not think that is the case. When you buy an 8.8 from ECGS it comes with brackets setup just like a dana 35 or dana 44 that came in the jeep. It's meant to be pretty much a bolt in job. For an SYE you will need adjustable control arms, an adjustable trackbar and possibly a trackbar relocation bracket...however all of these things would be needed on any of the 3 axles, not just the 8.8.
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Old 09-19-2012, 03:06 PM   #6
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would stock f8.8 shafts handle the L4 and 35" rubber locked? that would save a couple hundred when ordering and make me go the way of the f8.8
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Old 09-19-2012, 03:16 PM   #7
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You should also plan for a new rear CV driveshaft for the 8.8 due to its offset pumpkin which adds more angle than is healthy for the pair of u-joints on a factory driveshaft. A CV driveshaft will require you also install a SYE kit into your transfer case.

Not to mention 4.88 is not really enough gear for a tire larger than 33" with the 2.5L engine. For 35/36" tires, I'd be looking at 5.13 or 5.38 which is not possible with the front Dana 30 axle which tops out at 4.88 whether it is HP or LP. Until you replace the front axle so you can load your axles with lower than 4.88 gearing, I'd stick with 33" tires or replace the 2.5L with a 4.0L engine.
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Old 09-19-2012, 03:18 PM   #8
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would stock f8.8 shafts handle the L4 and 35" rubber locked? that would save a couple hundred when ordering and make me go the way of the f8.8
I am assuming by L4...you are talking about your 4 cylinder? If so, yes without a problem. Guys beat on the 8.8 locked with the 6 cylinder...so the 4 cylinder should be no problem. I run an 8.8 on 35s and havent had one issue (I am not locked yet, but have wheeled it pretty hard).

Jerry does have a good point with the gearing...4.88s are ideal for a 4.0L with a manual transmission and 35" tires...they arent the best setup for the 2.5L though.
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Old 09-19-2012, 03:54 PM   #9
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Yeah I know bout gearing. That y I will run 33s on the street and 35s when I wheel. Going to and from trails I guess I will live without 5th gear. So with the f8.8 I have to install a sye and cv driveshaft or can I leave slip yoke and put cv at axle end?
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Old 09-19-2012, 04:01 PM   #10
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Originally Posted by Jerry Bransford
You should also plan for a new rear CV driveshaft for the 8.8 due to its offset pumpkin which adds more angle than is healthy for the pair of u-joints on a factory driveshaft. A CV driveshaft will require you also install a SYE kit into your transfer case.

Not to mention 4.88 is not really enough gear for a tire larger than 33" with the 2.5L engine. For 35/36" tires, I'd be looking at 5.13 or 5.38 which is not possible with the front Dana 30 axle which tops out at 4.88 whether it is HP or LP. Until you replace the front axle so you can load your axles with lower than 4.88 gearing, I'd stick with 33" tires or replace the 2.5L with a 4.0L engine.
How does the cv and sye correct the offset rear pumpkin. Mine is about 3" to the passenger side. Would an adjusrable track bar work?

Also no matter what I try my ebrake won't hold!
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Old 09-19-2012, 04:04 PM   #11
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... can I leave slip yoke and put cv at axle end?
No, for two reasons... 1) Your existing t-case has a slip yoke style output shaft which prevents attaching a CV driveshaft to it no matter which end you place up front. And 2) the drivetrain angles would be incorrect for a CV driveshaft and the driveshaft u-joints would shake themselves apart from the resulting vibrations.
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Old 09-19-2012, 04:33 PM   #12
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Is any sye better than another as in standard vs Mega short? Brands? I saw on eBay a sye and drive shaft for $410. Or would u recommend going to one of the local shops, burnsville off road and iron rock off road are both about hr away me.
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Old 09-19-2012, 06:58 PM   #13
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Check out East Coast Gear Supply. They built my HPD30/Ford 8.8 shipped to my door. Couldn't be happier.
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Old 09-19-2012, 07:56 PM   #14
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Is any sye better than another as in standard vs Mega short? Brands? I saw on eBay a sye and drive shaft for $410. Or would u recommend going to one of the local shops, burnsville off road and iron rock off road are both about hr away me.
I'm no fan of mega-short SYEs for the average TJ, I installed a standard SYE and never regretted that decision. Mega-short SYEs eliminate the speedometer gear which means speedometer recalibrations must be done with an aftermarket electronic calibrator, and few TJs really benefit from a supershort-SYE.

To me, I'd go for nearly any SYE as we really haven't heard any complaints from any SYEs that are being installed. My favorite SYE/CV kit would come from Tom Wood at Tom Wood's Custom Drive Shafts - Tom Woods Custom Drive Shafts Custom Driveshafts Specialist who is both competitive with any price you can find and provides unsurpassed pre and post-sales support. Tom is well known as a real favorite for driveshafts and SYE kits. I've been a customer of Tom for over ten years and won't go to anyone else.
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Old 09-20-2012, 07:20 AM   #15
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K. Thank you all for your help
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Old 09-20-2012, 08:33 AM   #16
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For the SS SYE vs standard SYE, I'd almost suggest the opposite of Jerry if you have a TJ. It depends on your suspension setup, but after getting this far with everything I wish I would have just spent the extra cash on the SS SYE. Between the 8.8, 4" suspension lift and TT, I would like to have a bit longer drive shaft.

If you stick with your shorter lift you probably won't have that issue, but if you might ever go bigger it's something to consider.
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Old 09-20-2012, 09:03 AM   #17
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For the SS SYE vs standard SYE, I'd almost suggest the opposite of Jerry if you have a TJ. It depends on your suspension setup, but after getting this far with everything I wish I would have just spent the extra cash on the SS SYE. Between the 8.8, 4" suspension lift and TT, I would like to have a bit longer drive shaft.

If you stick with your shorter lift you probably won't have that issue, but if you might ever go bigger it's something to consider.
I dunno but my standard length SYE was fine with my previous TJ's 5.5" lift. In my personal opinion, there are few TJs that would actually benefit from a super-short SYE over a standard SYE.
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Old 09-20-2012, 09:05 AM   #18
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I've noticed that when adjusting the pinion angle it's much more sensitive after the installation of the 8.8. I think it's the combination of being offset to the passenger side plus the steep pinion angle.

Not saying it doesn't work, but I can't really see a downside to having a longer drive shaft other than the increased upfront costs.
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Old 09-20-2012, 09:11 AM   #19
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You have a good point that a super-short SYE would probably be a good idea with an 8.8 for reasons pointed out above. The downside already pointed out is you need an external electronic speedometer calibrator once you install a supershort SYE.
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Old 09-20-2012, 09:14 AM   #20
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The downside already pointed out is you need an external electronic speedometer calibrator once you install a supershort SYE.
Yeah that's pretty much it. The good side I guess is if you end up changing gear ratios, tires, etc. to the point where you would need to swapping the mechanical speedo gear more than once it might pay off since you only have to buy the electric calibrator once, but that's about it. The mechanical is definitely more simple.
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Old 09-20-2012, 01:59 PM   #21
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I was reading and the standard sye gives you about 6" more driveshaft. With the 8.8 and 2.5" lift would i need more than that? How much more length does a ss sye give you. Also this is gonna be a lcog build so i dont see to much more suspension lift in its future. Maybe 1.25bl.
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Old 09-21-2012, 07:58 AM   #22
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Might depend on the SS SYE; you can look up some and find the lengths to see. For instance, on the JB Conversions website it says their SS SYE is 3.125" shorter than a normal SYE.

With your small lift a standard SYE would probably suit you just fine; I just like to play devils advocate and make sure people think things through. When I first started I though, well I'll just do this one small mod. Then next thing you know I'm going a bit higher, swapping axles, etc. Now I'm planning a stretch and 4 or 3-link.

Just want to make sure you think everything through. If 2.5" is all the higher you'll ever go, get the regular SYE and be happy.
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Old 09-21-2012, 08:38 AM   #23
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With this jeep 2.5" is all i will do. Unless i put in a bigger engine ;o). The wife wants a jk unlimited though so engine swap way down road if ever cuz then i will have another jeep to play with/build.

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