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01-26-2010, 10:32 AM
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#1
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Registered User
Join Date: Dec 2009
Location: NY
Posts: 60
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hey everyone,
im looking to re-gear my axles and I am running a d30 and d35 setup on my 96 ZJ...i planned on getting a HP30 from a Xj but am wondering if there is a difference between the HP and reg. 30 gears? isnt it just placement of the pinion in the housing?
also with the rear d35 how many different variations are there? I saw c-clip and non c-clip..how would I know which I have? Also which axle shafts are interchangeable between models? YJ/TJ/XJ/ZJ??
thanks guys....
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01-26-2010, 11:23 AM
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#2
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Registered User
Join Date: Sep 2009
Location: Kingston, Pa. 18704, Pennsylvania
Posts: 3,465
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Never mind.
__________________
[COLOR="Black"][CENTER][SIZE="4"][FONT="Showcard Gothic"][COLOR="Black"][URL="http://groups.jeepforum.com/built-not-bought/"][COLOR="Black"]Built Not Bought #666[/COLOR][/URL][/FONT][/SIZE][/COLOR][/COLOR]
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79' CJ7
82' CJ8
94' YJ
96' ZJ
[i]Diagonally parked in a parallel universe........[/I]
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01-26-2010, 12:23 PM
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#3
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Web Wheeler
Join Date: Oct 2007
Location: Asheville, NC
Posts: 2,705
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Quote:
Originally Posted by 96liftedzj
hey everyone,
im looking to re-gear my axles and I am running a d30 and d35 setup on my 96 ZJ...i planned on getting a HP30 from a Xj but am wondering if there is a difference between the HP and reg. 30 gears? isnt it just placement of the pinion in the housing?
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The ring and pinion in a high pinion axle are "reverse cut". They are different than those in a low pinion axle. High pinion axles are stronger when used in a front differential because the drive force is exerted on the correct side of the ring gear.
I believe the D35's from 93+ are the same (The WJ D35 is an exception though). They're all 27 spline and c-clipped. Someone correct me if I'm wrong...
What size tires are you regearing for? It might be a better idea to look for a HP30 and 8.8 that are the correct ratio and can be swapped in. The HP30's and 8.8's were available with 4.10 gearing from the factory.
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01-26-2010, 12:24 PM
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#4
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Registered User
Join Date: Feb 2009
Location: Sonoita, Arizona
Posts: 2,095
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HP d30 has reverse cut gears, won't work in a LP d30.
__________________
95' Jeep Grand Cherokee Laredo, 148k, 5.2, NP242, 46RH, 4" RC lift, all new adjustable ca's(2 IRO front uppers and the rest RC adjustables), nitro shocks, JKS TB's, Jet Chip, Dynamax cat back, Magnaflow cat, GTP hood vents. 31" Pro Comps with Rock Krawler "D"s. Westin brush/grill guard with Hella 500s, 411's, Solid diff covers, detroit locker rear, power lock in front, SYE and Tom Wood's front/rear shafts, RE discos, BPE's, d-rings front and back, factory tc and rad skid, hitch, Sliders next.
03' Jeep Grand Cherokee Laredo, (wifes Jeep) 99k, 4.7 5 speed auto, K&N, KYB shocks, drilled-slotted rotors, All the toys.
2000' Ford Superduty, F250, 7.3, 198K, 37's, too much to list.
Built Not Bought #257
Parts for sale d30 and d35 parts http://www.jeepforum.com/forum/f126/...-parts-1004499
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01-26-2010, 12:45 PM
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#5
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Registered User
Join Date: Dec 2009
Location: NY
Posts: 60
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ok so i got the answers for my gear interchange questions as the HP is reverse cut...i have 33's on there now with the stock 3.55 gears...Its my DD and i wheel it at most 5x a year locally and at rausch creek...so crazy gearing isnt necessary but I do want to move this beast...i was thinking about 4.56's but I just did my friends XJ and he has the HP30 and the chry. 8.25 and I put in detroit tru-trac's and 4.10s and hes running 33 baja claws...
what gear recommendations you suggest? IF i could get a 8.8 and a HP30 in both 4.10 ratio that would be a home-run...but are 4.10's suitable..or would the 4.56 be better?
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01-26-2010, 12:57 PM
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#6
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Registered User
Join Date: Feb 2009
Location: Sonoita, Arizona
Posts: 2,095
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Most would say 456's with the 4.0, I'm going to run 410's but I have the 5.2, and I'm only running 31's maybe 32's someday. I'd lean towards 456's.
__________________
95' Jeep Grand Cherokee Laredo, 148k, 5.2, NP242, 46RH, 4" RC lift, all new adjustable ca's(2 IRO front uppers and the rest RC adjustables), nitro shocks, JKS TB's, Jet Chip, Dynamax cat back, Magnaflow cat, GTP hood vents. 31" Pro Comps with Rock Krawler "D"s. Westin brush/grill guard with Hella 500s, 411's, Solid diff covers, detroit locker rear, power lock in front, SYE and Tom Wood's front/rear shafts, RE discos, BPE's, d-rings front and back, factory tc and rad skid, hitch, Sliders next.
03' Jeep Grand Cherokee Laredo, (wifes Jeep) 99k, 4.7 5 speed auto, K&N, KYB shocks, drilled-slotted rotors, All the toys.
2000' Ford Superduty, F250, 7.3, 198K, 37's, too much to list.
Built Not Bought #257
Parts for sale d30 and d35 parts http://www.jeepforum.com/forum/f126/...-parts-1004499
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01-26-2010, 01:03 PM
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#7
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Web Wheeler
Join Date: Oct 2007
Location: Asheville, NC
Posts: 2,705
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Either ratio will be much better than what you currently have. If you have thoughts about going to 35's anytime in the future, go with 4.56's. If 33's are the biggest you'll ever get, 4.10's would be ok and should save some $ since you wouldn't have to regear.
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01-26-2010, 01:08 PM
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#8
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Registered User
Join Date: Dec 2009
Location: NY
Posts: 60
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yeah thats what I was thinking...i just did a search of local scrap yards...found a 8.8 with 4.10's etc..for 450 and 350 at two different yards...whats a decent price for that axle complete?? and the HP30 I can get for 3-$400...
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01-26-2010, 01:23 PM
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#9
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Registered User
Join Date: Mar 2007
Location: ohio
Posts: 5,647
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im going with 4.56s and will be running 33s on my 5.2
__________________
- John - 23 and learning <-- ORIGINAL
- 1996 Black ZJ Limited: 5.9 swap, LA's, axles, absolutely built to hell
- 1998 Platinum 5.9 Limited: DD with some lighter modifications
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01-26-2010, 01:40 PM
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#10
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Registered User
Join Date: Dec 2009
Location: NY
Posts: 60
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i would like the 4.56's but for ease of swapping and everything it would probably benefit me to swap the HP30 and the 8.8 straight up with the 4.10 ratios...
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01-26-2010, 02:07 PM
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#11
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Registered User
Join Date: Feb 2009
Location: Sonoita, Arizona
Posts: 2,095
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That's definitely best for your wallet. 
__________________
95' Jeep Grand Cherokee Laredo, 148k, 5.2, NP242, 46RH, 4" RC lift, all new adjustable ca's(2 IRO front uppers and the rest RC adjustables), nitro shocks, JKS TB's, Jet Chip, Dynamax cat back, Magnaflow cat, GTP hood vents. 31" Pro Comps with Rock Krawler "D"s. Westin brush/grill guard with Hella 500s, 411's, Solid diff covers, detroit locker rear, power lock in front, SYE and Tom Wood's front/rear shafts, RE discos, BPE's, d-rings front and back, factory tc and rad skid, hitch, Sliders next.
03' Jeep Grand Cherokee Laredo, (wifes Jeep) 99k, 4.7 5 speed auto, K&N, KYB shocks, drilled-slotted rotors, All the toys.
2000' Ford Superduty, F250, 7.3, 198K, 37's, too much to list.
Built Not Bought #257
Parts for sale d30 and d35 parts http://www.jeepforum.com/forum/f126/...-parts-1004499
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01-26-2010, 02:28 PM
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#12
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Registered User
Join Date: Sep 2009
Location: ny
Posts: 353
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what type of rpm's is he going to run on the highway with 4.10s vrs 4.56?
__________________
02 overland, bone stock
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01-26-2010, 02:36 PM
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#13
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Registered User
Join Date: Dec 2009
Location: NY
Posts: 60
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yeah i already found a local yard that has both axles and has them from all different trucks so the picking is plentiful...hope I can work out a package deal for the two...im figuring i will eliminate my ABS so it doesnt matter if i get the ABS axles or not...hopefully I will locate two axles later this week and pick them up when i get my tax return!
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01-26-2010, 02:39 PM
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#14
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Web Wheeler
Join Date: Oct 2007
Location: Asheville, NC
Posts: 2,705
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According to the gear calculator here its would be around around 2100 RPM's at 65 with the 4.56's and around 1900 with the 4.10's.
Gear Ratio Calculator
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04-06-2010, 08:05 PM
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#15
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Registered User
Join Date: Aug 2009
Location: KIRKLAND
Posts: 293
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I have a hp30 and a 8.8 on 33s I went with 4.88s and I love the power it gives my 4.0. if you spend the money do it right and go with 4.88s.
__________________
96 ZJ V8, HP44, Ultimate 8.8, 242tc swap, Tom woods shafts, long arms, 33s...
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>
hp30 vs. d30...etc
