J30 diff question (about driveshaft)

[SketchyRollin564]

yep thats right! finally got a vlsd! next video of me sliding wont be one wheel fury haha



anyways, its a 6 bolt, so technically it should be a bolt on affair, but ive read numerous times that if you dont have the abs driveshaft, the extra legnth of the vlsd from the abs sensor can put a lot of stress on the driveshaft

im not asking if this is true, cause that obviously makes sense, but how many of you run a j30 diff with a non abs driveshaft? how did it hold up? any problems?

ive also read that its a little extra stress, but its fine, but if you drive it hard then its a bad idea?

idk how cheap i can get an abs driveshaft for, but id obviously rather just use my current driveshaft if i can

[E7-S14]

abs driveshafts are usually the same price as a non-abs

Most guys that swap j20s in there s13s/s14s don't have abs and dont swap driveshaftsso

if it is an abs diff. im sure it never made a huge difference.

[iitywygms]

Yeah I heard it can cause a transmission leak. However, I have been running mine without the abs drive shaft for 3 years now with no issues.

[574-240sx]

The J30 diff is just a tad longer. The rear section of an abs driveshaft is a tad shorter. If you use a non abs driveshaft it will force more wear on the carrier bearing and shove the extra length of the driveshaft into the back of the trans. Over time it will start to wear on the rear main seal on the transmission. Also it takes maybe 20 minutes to swap out a rear main seal.

Also SketchyRollin564, you are going to have to track down some rear diff bushings. You can also just swap the guts of the J30 into your S13 diff case.

[ss82480]

Over a year rolling with non-abs driveshaft and having had any leaking or issues yet.

[SketchyRollin564]

The J30 diff is just a tad longer. The rear section of an abs driveshaft is a tad shorter. If you use a non abs driveshaft it will force more wear on the carrier bearing and shove the extra length of the driveshaft into the back of the trans. Over time it will start to wear on the rear main seal on the transmission. Also it takes maybe 20 minutes to swap out a rear main seal.

Also SketchyRollin564, you are going to have to track down some rear diff bushings. You can also just swap the guts of the J30 into your S13 diff case.

thanks, thats some good info, couple questions tho, wtf is the carrier bearing lol

ive heard you would have to frequently replace your rear main seal, i just thought it was the engine rear main seal and not the transmission rear main seal. how frequently? woujld i be able to run my car with the non-abs diff for like a month and not have a problem?

why do i need new bushings? or is it just recomended since they are old?

and also... what s13 case? i have an s14 lol

i was thinking about htat idea, because i wanted to keep the stock ratio, but i have already been car-less for like a month and i cant deal with it for any longer

Over a year rolling with non-abs driveshaft and having had any leaking or issues yet.

Yeah I heard it can cause a transmission leak. However, I have been running mine without the abs drive shaft for 3 years now with no issues.

thats good to know, but also, how do you guys drive your cars?

do you guys take it to the track and have fun with them or just daily drive?

im thinking for just daily driving i should be fine, but i dont wanna drive my car hard and then all a sudden have a bunch of problems

and...http://www.shaftmasters.com/st...410b0thats expensive

[ss82480]

I've only taken mine out to the 1/8 mile track, and the occasional spirited drive on the streets.

[Warped161]

you diff in the picture has no bushings, you will asls need some spacers and i hope you have the bolts that came with the j30 diff to mount it up. I use the stock drive shaft as well, 3 years no problems.

[sideslider]

i have a j30 diff with a non-abs driveshaft and no problems, no leaks, the driveshaft goes on without putting any stress on it.

[iitywygms]

thats good to know, but also, how do you guys drive your cars?

do you guys take it to the track and have fun with them or just daily drive?

im thinking for just daily driving i should be fine, but i dont wanna drive my car hard and then all a sudden have a bunch of problems

and...http://www.shaftmasters.com/st...410b0thats expensive

I drive "spirited" on the street and track it 8 times a year. no issues, but I think my throw out bearing is about to go. lol.

[SketchyRollin564]

nah, i didnt get any bolts or bushings with my dif... i cant use the bolts from my old diff?

and i guess since i dont need an abs diff it looks like... ill be spending the money on bolts and bushings... where do i get them?

would it be safe to buy used ones, or is it one of those things where since your at it, its better to buy new ones?

[Warped161]

used ones are fine but your old ones will be too short.

[SketchyRollin564]

so what should i look for, as in whats the name

J30 differential bolts and j30 differential bushings?

[SketchyRollin564]

so what should i look for, as in whats the name

J30 differential bolts and j30 differential bushings?

?

[dennydizzo]

hey just wondering do u guys get better gas mileage with the j30s because of the gear ratios? and how is the acceleration?

[PorkChopExpress]

you get that at a pick n pull? how much? i wanna see your one wheel peel video!

there not technically serviceable, but has anyone drilled and put new silicone in?

[SketchyRollin564]

you get that at a pick n pull? how much? i wanna see your one wheel peel video!

there not technically serviceable, but has anyone drilled and put new silicone in?

nah i traded my xbox for it + some engine and transmission mounts and a turbo timer that i dont need

and no one wheel peel video just thishttp://www.youtube.com/watch?v=zq5wC4LUAlw

[modulation]

hey just wondering do u guys get better gas mileage with the j30s because of the gear ratios? and how is the acceleration?

Honestly the difference is so little you don't really notice it.I'm sure I get a little better gas mileage if you cruise all the time, stop and go I doubt it matters. Accel wise it's a bit slower but when I go turbo it'll be sweet.

[modulation]

nah, i didnt get any bolts or bushings with my dif... i cant use the bolts from my old diff?

and i guess since i dont need an abs diff it looks like... ill be spending the money on bolts and bushings... where do i get them?

would it be safe to buy used ones, or is it one of those things where since your at it, its better to buy new ones?

DO NOT USE OLD BOLTS.If you are lucky they won't be long enough to bolt in.If you are unlucky they will bolt in like 2 threads and you'll be driving one day and your diff will drop to your sway bar and possible crack the rear diff cover.

If you didn't get the bushings/bolts with the J30 diff from the J30 then that sucks.. Possibly goto a junkyard and see if you can get them.

[sleepersilvia92]

i have a 93 coupe with a rb25 with a 1 pc drive shaft i am about to put in a j30 diff how is the install with a 1 pc? has anyone done it?

[sloweighty]

Also SketchyRollin564, you are going to have to track down some rear diff bushings. You can also just swap the guts of the J30 into your S13 diff case.

you would also have to swap out the big gear thing (sorry i don't know what it is called) because if you don't you would have a lot of play. I have swap out the the j30 guts into the s13 open diff before and when i was done it look great but when i tried to turn the diff to see if it works before i put it into my car and it feels very tight, but i think i something wrong with two half rings that holds the vlsd in. so i will need to take it apart and fix it and i will write a review on it for future, searching purpose.

[sloweighty]

abs driveshafts are usually the same price as a non-abs

Most guys that swap j20s in there s13s/s14s don't have abs and dont swap driveshaftsso

if it is an abs diff. im sure it never made a huge difference.

so you can swap the j20 diff to or is it the g20's.

[OutToWinPAHC]

You can take you driveshaft to a local driveshaft shop / axle place and have it shortened 20mm and get new U joints for about 100 bucks.

Pretty much brand new after that.

[IDRFT95S14]

i just did the j30 diff swap about 3 weeks ago it was a piece of cake only thing i changed was the diff bushings off the j30 diff and replaced them with the stock ones off the open diff

[IDRFT95S14]

forgot to mention this was a 95 j30 diff going in s 95 240 no modifications needed to driveshaft or anything even the axles u can still use the stock ones off ur 240

[meet07]

Curious......can you weld the stock open diff and swap over to the j30 housing??

[OutToWinPAHC]

Yes you can I have a NAZ32/J30/Q45 case with welded R200 guts. Using the lower 3.698 ring gear and beefier pinion

[domiballa]

i got my j30 lsd at pull and pay for 60 bucks about a week ago

[s13beast]

i got my j30 lsd at pull and pay for 60 bucks about a week ago

I got a far superior N/A z32 diff for 40$ fools! 4.08 ratio ftw!

[stockbee]

perhaps a stupid question, but how is that one superior? I'm new to these cars and as a result the parts as well. Are the ratios shorter or longer for the 300ZX one?