93-94 J30 Diff w/ axles Work? whats the Deal?

[MrFairlady]

Ok searched and Alot of People are talking some diff stuff about it + I think they are talking about the 95+ J30 Diffs...so whats the bottom Line there on a 94/below Diff???.

Found a 93-94 J30 diff (entire car).
Will this Bolt up to my S13 no problem w/ the axles?
Just Still swap the rear cover Right??

This year (93-94) has 5 bolt correct? STill be the right length etc right??
Or do I just need the Diff and another cars axles.

[Somnambulist]

Yes it will bolt up to your car with the correct axles (corresponding J30 5 bolt 93-94 axles).

95+ J30 axles are 3 sets of two just like the S13/S14.

Not sure about the diff cover, but I didn't have to swap the rear cover on my S14. Maybe S13s are different.

[MrFairlady]

Werd...was wondering about this whole "Free play" or lack there of,that was the Main concern on the treads I found.

Its a 91 hatch its going in.Didn't know about the whole Driveshaft thing also.
I think the J30 is a 94.Its either 94 or 93.

Thanks

[projectRDM]

92-94s use the 5bolt axles, get the axles and it all bolts in. 95-97 use the 6bolt, you don't need the axles.

You will have to swap the cover, it's a 2bolt, and you'll need the front snout bushings and hardware to mount it. Shame too, the earlier J30s had the nice finned rear cover.

[Somnambulist]

Werd...was wondering about this whole "Free play" or lack there of,that was the Main concern on the treads I found.

Its a 91 hatch its going in.Didn't know about the whole Driveshaft thing also.
I think the J30 is a 94.Its either 94 or 93.

Thanks

It will work. The J30 diff is about an inch or so longer than the S13/S14 diff because of the ABS thing (sensor?) on the front of the diff.

I just wedged it together and it worked fine. It has not given me any issues other than being more difficult to bolt the driveshaft to the diff.

92-94s use the 5bolt axles, get the axles and it all bolts in. 95-97 use the 6bolt, you don't need the axles.

You will have to swap the cover, it's a 2bolt, and you'll need the front snout bushings and hardware to mount it. Shame too, the earlier J30s had the nice finned rear cover.

So it's confirmed you need to swap the cover for an S13? My S14 had no issues and bolted right in. :bigok:

[ARS13]

I've got one in my car right now. I just had to use the 5 bolt axels and my factory rear cover; it works great and was only 150 bucks from a local salvage yard. It was all a very straight foward install also, everything fit perfectly without any problems.

[MrFairlady]

Got mine yesterday for $121 w/ the axles.

My Buddy is actually gonna remove the Diff from the J30 and put it in the S13 Diff so I can even keep the Final Drive the same!!

thanks
I was worried that people were saying the axles were diff size on only a few diff diffs or some shit.My Buddy actually confirmed it so I'm gonna go pull my diff today to get started.

[projectRDM]

Got mine yesterday for $121 w/ the axles.

My Buddy is actually gonna remove the Diff from the J30 and put it in the S13 Diff so I can even keep the Final Drive the same!!

thanks
I was worried that people were saying the axles were diff size on only a few diff diffs or some shit.My Buddy actually confirmed it so I'm gonna go pull my diff today to get started.

Final drive is the same, 4.08:1. Only the later 95-97 J30t has the lower 3.92:1. All other models match.

[Spring Break '92]

Quick question, can I use the J30 5 bolt axles as replacements for my JDM R200V diff that also has the 5 bolt axles?

[MrFairlady]

they should work fine.

Mine bolted right up and from what I understand they are all essentially R200's.

My main concern was the driveshaft being longer what that will do but most people say it will be fine.My Buddy ran it on his 240 (S13) and it was great.
oh well,...we'll see

[cured13]

So how is going your swap? Is your s13 ABS or nonABS?
What driveshaft did you use?

[ZipTiedCoupe]

Use your stock driveshaft. ONLY THING YOUR CONVERTING IS THE REAR COVER AND AXLES. Oh, and of course the diff.

[MrFairlady]

Use your stock driveshaft. ONLY THING YOUR CONVERTING IS THE REAR COVER AND AXLES. Oh, and of course the diff.

Swap Complete.
everything popped right in.
I have a Non-Abs car of course.....If I had ABS don't they all have a VLSD?I'm still Using my non-Abs Shaft.
of course now all of a sudden I have a Tailshaft seal leak.:rant:
Ordered a New one.

What I'm not sure about is:
someone told me the 93-94 J30 had the same Gearing as the S13 Stock open diff?>>
And the 95+ had a Longer ratio....or that the only one that had the longer ratio was the J30T diff??
Whats the deal w/ that.I am noticing I'm either
A: going faster at lower RPM;s
B: Speedo could now be waaaaay off

Accel I'm not so sure I like...granted I porbably need some more power (I/DP/E Stock SR + stock boost)
***Ordered a HKS Wastegate Act, N60 Maf for $19 & .getting a Databoard chip Tune by my friend and going to prob 10-12lbs of Boost (daily Driver).

[ZipTiedCoupe]

try edmunds.com or another site with info on the gearing. that might help.