Opinions please.....

Facts
94 yj with 2.5 inch lift. Lowered tcase 1 inch. Still have slight vib at speeds over 70km/h. I have some 4degree shims for the rear just haven't put them in yet.

Question about SYE
I know SYE is the answer to the vibs but I am limited on funds and I am trying to prioritize my upgrades. SYE is diffenantly in the plans as I want to go SOA so it will be needed eventually. Right now I am trying to decide either SYE or a rear locker. My question is if I go SYE with a CV shaft right now will I have to get a new rear CV shaft when I go SOA. If that is the case then I guess rear locker it is then and just throw the shims in.

Question about Locker (rear)
Trac Lok???
EZ-locker????
lock right ???
dana spicer???
are any of these worth it or should I just save for an ARB air locker


Feedback???

sye would be good, however its like 75bucks to lengthen the driveshaft, so go for a locker, i know that there was a lockright for sale on this board for your d35c just a month or 2 ago, i dont think that it has sold yet, or you could just weld it up

where are you gettin a shaft lengthened fer $75???

I believe it was sold. (lockright)

However if anyone has any of the above mentioned parts let my know.

Go for the locker, grab a Detroit or ARB. The Lock Rite style lockers generally do not last that well when continuously used in a rear axle on pavement. You'd be better off with the SYE rather than a Lock Rite. A 2.5 degree shim under your rear axle will get rid of the vibes.

Hey Mike,

You've got lots of options at this point, but it's important to take care of the vibes before they start causing problems with the driveline. U-joints may be cheap, but in the longhaul, a tc overhaul isn't and dropping a shaft ain't no fun either.

1) Throw in a couple of 1" raised motor mounts or spacers, and that should do away with any vibes a 2.5" lift will cause. It will also help out driveline angles big time, when you go SOA. btw...I've gone up to 3.5" sl, without a sye, when using the mounts and a couple of 2deg shims on the rear, with NO vibes at all.

2) Get the sye and shaft now and when you go SOA, ditch the d35 for a d44 out of a Waggy or Scout2 and the extra length of the 44 pinion will put you just about bang on for shaft length. The only thing is, I believe you'd have to machine your 35 pinion yoke or get one that accepts 1330 u-joints, so you can use the shaft on a d44. Basically what I'm saying, is keep all your u-joints the same on the rear and 1330's would be a good choice.

Thanks fer da advice. I've just thrown in the shims and it seems to of taken care the vibes. And I've gone with the locker in the rear.

The ultimate plan is to go with SOA with d44's or even instead of the SOA go striaght to coils with the d44's I haven't decided yet. Either way the SYE is definantly coming next year.

Hey man, glad to hear ya cleared up most of the vibes. Yea, I've got a ton of stuff on the go right now, hopefully it will all fall together and go on my rig this spring. I've got 2 d44's that I'll be swappn' in at the same time I go SOA, which I'll have to lock and regear, got to narrow the front and prep for high clearance steering, got an engine on the rebuild, sye still to buy. My yard and basement look like a junkyard and the wife's ready to kill me. Eventually I'm going 1/4 ellip on the rear, shackle reversal and 3/4 ellip (buggies) on the front., but not until I get another jeep for my daily driver. The wife doesn't know about this yet ~lol~

OK, I read and read and read, but I still have NO IDEA what SYE means .

SYE = Slip yoke eliminator

YJ's and TJ's have a very short rear drive shaft with a slip yoke into the tcase. This causes problems with lift because driveline angles change too much even with a little lift. An SYE kit replaces the slip yoke to a fixed yoke, provides more space for a longer drive shaft and adds in a CV joint.

I had a hard enough time convincing mine to let me get one. She has been pretty understanding so far though. Lucky me!! Sounds like your about a year and a half ahead of me. Not to many parts laying around yet but I see it coming and I am only six months into the "Jeep thing".

Yup, Mike you're right, you are Very lucky to have an understanding wife Sounds to me like a real keeper Mine's been really understanding too, I'm just at about the worst stage right now as far as the wife see's it. It's like I've spent a lot of time locating and dealing on just about everything I need, and now most of it's all sitting around waiting for me to spend more time on to get it all together to go on. It's like all that time and nothing to show, except a huge pile of junk (gold and diamonds in my eyes). About a month ago I got a steel of a deal on a high pinion d44 with drivers drop, that I couldn't pass up so I used the grocery money $200.00 and added it to my collection I won't be that selfish again, for a long, long, time. This is my second go round with the "Jeep Thing", and all as I can say is, make sure of what ya want, budget yourself for a quality project, plan your work then work your plan, but most of all, be patient and have fun cuz it will all come together I know you'll be happy and have tons of fun, cuz ya own a Jeep

I had the some problem...but that is what I was thinking...

I want to do the same on my 231 T-case

what are the high pinion D44s in?

High pinion d44's with driver's side difs are for sure, found in 78/79 full sized Broncos, 78/79 f250s and hd f150s. The ones I've measured have a 66" wmf-wmf track width. I've heard of them in earlier 70s f250s, but that's just hearsay, I can't confirm this. By narrowing the housing/tubes to accept 80-84 waggy d44 inner shafts, they make an almost bullet proof front end for our YJ's & TJ's with a track width of around 61.25" wmf-wmf

The Dana 44 also resides under all of the 94-2001 Dodge Ram 1500's. I will be getting rid of my Dana 44 front set up for coils here soon and replacing it will the Dana 60 I have stashed away. The Dana 44 front out of a Ram also doesn't have manual hubs but has a Central Axle Disconect that is vacume opperated that can be easily converted to cable operated.

OPPS but they are not high pinion I don't think??? Now I really have to go and check? But I think they are????

DAMN IT I HAVE TO CHECK NOW I CAN'T REMEMBER

Hey Jay,

Yes, you are right about the Dodge Rams using d44's, but I'm almost certain they are standard rotation up front. Other than custom fronts, as far as I know, only Ford and Jeep have used reverse cut fronts. I think some Hummers have as well, I think they are IFS, but I don't know enough about them to say

I know for certain that the Hummers are IFS but as for being DANA I think they are GM Corp (like the 14 bolt) axles in them. They have a good set up just not enough flex. They have the disk breaks housed next to the diff like the Jags.

MODEL OF THE HUMMER REAR END


Pics from under Tims Hummer

Also can't you just change the gears from standard cut to reverse cut? You have to specify what rotation you want when you order yours gears don't you? Do you know what years Jeep used reverse cut fronts? If they are the same years as the Dodges then good chance the Dodges are too...

I will find out if mine are or not??? I really don't think they are.

Axle Model - Dana 44 (216)
Axle Type ............................................Hypoid
Axle Tube Thickness 0..39"
Lubricant Specified Thermal Stable SAE 80W-90 GL5
Lube Capacity 4.8 pints ( 2.28 L )
Axle Ratio Options 3.54, 3.92, 4.09
Carrier Split 3.73 and down, 3.92 and up
Ring Gear
Diameter 8.50 in. ( 215.9 mm )
Backlash .. 0.004- 0.009 in. (0.10-0.23mm)
Axle Shafts 30 Spline, 1.31" diameter (inner)
1.34" (outer)
Axle spline pitch 1.25"
Axle Shaft material Low carbon Alloy
Pinion mount Overhung
Pinion shaft diameter 1.376" at inner bearing
1.35" at outer bearing
Pinion Standard Setting 4.312 in. ( 109.5 mm )

So I am going to say standard cut...???

Hey there Jay,

I forgot to mention, I think that Toyota also has a high pinion option with some of their IFS front ends. But not to put IFS down or the people that run them, but, I prefer a SFA for hard core wheeln'. So when speaking about hp front ends, I'm talking SFA.

Now the Jeeps that I know of that come from factory with hp front ends are, Wranglers and around same year Chery's, and those are only d30s. I don't think that there's even a hp d44 front option for them. I know there's a d44 rear option, but I do believe they are using the weak d35 tubes on the 44 housing.

Now that question about using reverse gears in a standard rotation carrier and housing is a very valid one considering that the ring is located on the same side of the housing on both. Technically it should work. But, the way I understand it is, because of the way the bevels are machined the pinion would have to be located above the center in order to properly line up for proper tooth placement/contact, then again I've never compared or tried it either. I believe they are machined specifically for rr housings. One also can't take a sr housing and turn it upside down for a hp because the ring would be on the wrong side for the direction that the pinion is turning. Your front and rears would be fighting each other, because your d-shafts both turn in the same direction.

In any case, Jay, check your front end and let me know if it's SR(standard rotation) or RR(reverse rotation). Who knows, there might be front ends out there other than what I know of that are high pinion. But like I've said, the only SFA's that I know of, other than custom (Currie, Dynatrac, etc..) that are hp, are in Fords and Jeeps.

Talk atcha later

I really don't know how to check if it is standard rotation or reverse cut? I will go and look here when I go out to see it if it is a high pinion but I really don't think it is.

Also does the Ford 9" not have a high pinion option as well? And even if it does not come with it can you not get a High Pinion 3rd Member from Strange? Lose alot of weight too.

Here is my front diff. Definitly not a High Pinion




Here is the link to a larger pic
http://www.bogginfreaks.com/phpreaders/view_photo.php?set_albumName=pornstar&id=ajh&full=1

Yup, your front end is definitely a SR front diff. I guess I should clarify, and I'm sorry if I miss lead you in any way. Gear manufacturers (dana, richmond, superior, etc..) often refer to reverse cut gears for high pinion setups as RR(reverse rotation). The gears don't rotate backwards, rr is just a common acronym used to identify reverse cut gears. So your front end is a standard rotation front which would use SR gears.

Yuppers, Ford does have a 9" high pinion option. I know that Currie Ent. works with these 3rd members on a lot of their custom rock crawln' fronts. A hp 9" would make a killer setup on your rig, that's for sure I would definitely keep your eyes open for one. For me, up front, a hp44 should be good enough since I won't be runnen any larger than 36's on my light lil' YJ.

Just an FYI for you guys.. Toyota has a HighPinion axle as well.. It's from an FJ80 Land Cruiser. Easy mod to take the High pinion 3rd from an FJ80 from axle and retro-fit it into a standard Toy Solid front axle.. Or do what I did and put the whole FJ80 front axle under your truck...

Also you can get the FJ80 front axle with standard electric locker...

9" Fords dont COME in High Pinion, they are modified with 8.8 gears, etc by the aftermarket. Currie is the only one that I know of. Being they use the 8.8 gearset, the gears arent as strong as the 9".

Yes, actually you are right Fordboy Me big dumb dumb Ford doesn't have the 9" hp option, it was their IFS I got confussed with the 9". I'm not sure about Currie, but I know that Randy's Ring & Pinion sells these housings with carriers in a larger size for 35 spline axles. I wonder if these are using 8.8 gears as well, and it's much like Superior's Super 35 which uses 30 spline shafts for the dana 35? In any case, even with an 8.8 R&P, it's stronger than a 44, and with a 35 spline setup, it's nearly as strong as a 9", only .20" smaller on the ring gear dia. The 8.8 has a larger pinion shaft diameter as compared to the 9" as well.