lsd questions

[bansheenut420]

I am looking at doing some sort of lsd while the trans is out for a clutch. My decision is between a Phantom grip extream and a obx. My first question is, I know the phantom is not near the lsd the obx is, but would it really even be worth my time? My bigest concern is the obx is less the 100 more, but I know I need a diff ring gear. What all do I need for the obx? And would that be somthing a local trans shop could do withough messing it up? lol

Input, thoughts?
Thanks in advance.

[DaPepster!]

I haven't heard of too many people satisfied with the Phantom Grip diffs, so I'd say either OBX or Quaiffe. I'm debating a Quaiffe for mine while it's still apart (IF I decide to shell out $ 1300 for one )... There's a how-to with photos on Cliff's website for installing a Quaiffe too, as well as the other stuff necessary to install it.

[bansheenut420]

Yeah. I wont buy a quaife. Every obx unit I have seen in use, hasnt failed due to the obx. I cant imagine paying 1000 dollars more. Thanks for the links!

[92spiritrt]

i just put a phantom grip extreme in my r/t. it did seem to help, a 24psi blast in second gear doesn't break the tires loose as hard and the car does pull stronger. it seems to have a bit less torque steer, but the front end drifts a bit when they do start spinning. i ground the lip off of the gears like it shows on cliff's site so it grabs a bit better.

[bansheenut420]

Quote:

Originally Posted by 92spiritrt i just put a phantom grip extreme in my r/t. it did seem to help, a 24psi blast in second gear doesn't break the tires loose as hard and the car does pull stronger. it seems to have a bit less torque steer, but the front end drifts a bit when they do start spinning. i ground the lip off of the gears like it shows on cliff's site so it grabs a bit better.

Thanks for the input. That is one reason I am thinking of the phantom is simplicity. I dont have to get a new ring gear. I like the 3.85 so my pig will get moving, not reall concerned about spool time in 1st. lol I want all the input I can get.
Thanks.

[92spiritrt]

it is as simple as you can get. just follow the instructions on cliff's site. hardest part was getting the ring gear off in my case. had the whole thing apart and back together in about 25 minutes

[bansheenut420]

Simple is good, and thats why I am having a hard time with the OBX. I dont know how hard it is to install one, but its probably not somthing I want to do. Phantom grip however, I more than likly could. But, it will wear out eventually. In addition to the car being balance, I think I will need some traction help once the holset is on.

Thanks again, and keep the input coming.

[Reaper1]

Cory, I honestly don't beleive you will be satisfied with the PG. With the amount of mods and everything else you have in your car, you might as well do it right! I'm personally using an OBX...LOVE it! There is NO WAY a PG could compare to this thing! I'm not making near the power you are, but even with the power I am making it has been worth it: 210hp/291tq.

Small observation:
Although I understand most TD people are more persuaded towards that money saving side of things when it comes to modding their cars, here's something I just don't get: They'll spend $400 on pistons(or more), upwards of $1800 on a head, $800-1500 for a turbo(depending on the turbo), $400 for a good clutch kit....all this and a $1300 LSD is too much money?! I don't know whether it's becuase once it is installed you'll never see it again(hopefully), or that it doesn't actually help make power, but to me this is a no brainer! Yeah, I do cringe a bit when I hear the price, but when you weigh out the options of everything it makes perfect sense. It helps you put the power you are making down, it helps handling, it helps the tranny live longer, and pretty much once you buy it, you don't really ever have to replace it!

TD: $400
engine: $800
head: $1200
turbo:$800
supporting hardware: $1200
being able to put all the power to the ground: priceless!

[tryingbe]

Phantom grip type of LSD will wear out in a short period of time.

Mine is already starting to worn with less than 2000 miles since built. Break away torque is way way down compare to 2000 miles ago. Only reason why I add that LSD is I like the 3.85FD ratio. If I can go back in time, I'd probably leave it as-is.


Get the OBX. You'll need the differential ring gear with matching intermediate shaft from an A523. 3.5FD is the most common, but you'll also see 3.85FD once in a while.

Though you will save yourself a LOT of hassle by buying the Quaiffe in the first place. Might not cost as much as you think, compare to OBX and a LOT of work.

[92spiritrt]

i plan on running the obx with the 3.5fd. i put the phantom grip in right now when i had the trans out to do the clutch to get me through the year. my trans is acting up a little now(bad synchros for 2nd and 3rd), so when it gets redone in winter then i will put the obx in. i bought it as a temporary lsd solution. cory if i were you, i would go obx with the 3.50. with the power you are/will be making the 3.50 will aid in traction a bit and cruise nicely on the highway.

[kermit]

IMO, I wouldn't go with the phantom grip. They do wear out, and they wear out faster the more you use the "limited" slip feature, because you're slipping the clutches more. And tryingbe says his is starting to show wear at only 2k mi.

Also the PG still uses the diff pin. Granted the PG takes some load off of it, but so you still have the potential risk of wearing through it, especially as the PG wears out.

As for OBX vs Quaife, I would use the use the OBX for my car. Way I figure is that the Quaife is 2x to 3x the cost of the OBX, and the OBX is essentially a copy of it, so I don't really see any gain. I've heard a lot of good things about people using the OBX when it has been modified to be more reliable. If I was doing a lot of drag racing or autocross, then I would think about going with a Quaife because of the higher demands that would be placed on it. But since I'm using mine on the mostly on the street I imagine that this will be the last LSD I buy for this car. Not to mention I believe that OBX has a Lifetime Warranty like the Quaife.

[bansheenut420]

Thanks for everyone's input. This is helping me make my decision. Thanks, and keep it coming

[DaPepster!]

Quote:

Originally Posted by Reaper1 Small observation: Although I understand most TD people are more persuaded towards that money saving side of things when it comes to modding their cars, here's something I just don't get: They'll spend $400 on pistons(or more), upwards of $1800 on a head, $800-1500 for a turbo(depending on the turbo), $400 for a good clutch kit....all this and a $1300 LSD is too much money?! I don't know whether it's becuase once it is installed you'll never see it again(hopefully), or that it doesn't actually help make power, but to me this is a no brainer! Yeah, I do cringe a bit when I hear the price, but when you weigh out the options of everything it makes perfect sense. It helps you put the power you are making down, it helps handling, it helps the tranny live longer, and pretty much once you buy it, you don't really ever have to replace it! TD: $400 engine: $800 head: $1200 turbo:$800 supporting hardware: $1200 being able to put all the power to the ground: priceless!

Quote:

Originally Posted by tryingbe Though you will save yourself a LOT of hassle by buying the Quaiffe in the first place. Might not cost as much as you think, compare to OBX and a LOT of work.

100 % what I'm thinking.

[bansheenut420]

I wont get a quaiffe. The obx has proven itsself to work grear for our cars. Plus, lifetime warranty. I know its more work. But, work is not a problem. Its between a OBX and a phantom grip. And I am leaning toward the obx. Just need to check on a few things.

Thanks again everyone for your input, and please keep it coming.

[xtrempickup]

i had a 3.85 ring gear and shaft from a 523 and i just sold it as i changed my mind about putting an OBX in my trans. a 92 or 93 2.5L NA daytona is what i got mine out of