tangb2023

wondering how hard is the install for ctr or itr lsd to be swapped into 00 si trans.. anybody got a how to?? how long does it takes, 4 hrs?

thanks

quik2kSi

talk to username (nickwilmot) on here he's doin one now... search for it there is a thread that shows good info.

glagola1

Do you own a helms manual? It will help greatly. The time spent on the install is going to depend of several factors. It may take weeks. I'll explain.

If the diff doesn't have a ring gear installed you will have to use the one from your current diff. This may take a while because the bolts that secure it to the diff are torqued to somewhere around 80 ft-lbs and they are REVERSE threaded. It's pretty tough to break them loose.

Secondly, you will have to shim the bearings in order to get the proper clearances in the case. When ever you change a diff in a case there is going to be a difference in tolerance and all the cases come with the size shim that was found to be correct by honda. Once you place a new diff in the case and bolt it up you will have to measure the clearances inorder to choose the right shim. The helms manual explains this procedure clearly.

So if you are going to do it right you will have to consider some down time so that you can order the correct size shim. It sucks, I know.

All in all, taking the case apart isn't that difficult but the ring gear and the shims can be a pain in the ***. If you have a helms manual and you are patient and allow for a reasonable amount of downtime, it's not too bad. I've done it and the rewards of a LSD are worth it. I'm about to go through it all again for a quaife this time.

mugensport9

ya it sounds like its time consuming and possibly complicated. if u havent bought the tranny u might want to look for a b series transmission with lsd.

tangb2023

^ i'm currently running b20b with si trans.. did not know it takes this long. a couple of weeks thanks for replies though.. anyone else did this??

chameleon

yeah anyone else? what about when its a quaife, differences?

Targa250R

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by chameleon &raquo;</TD></TR><TR><TD CLASS="quote">yeah anyone else? what about when its a quaife, differences?</TD></TR></TABLE>
The OEM Honda LSD is a helical Torsen LSD just like the Quaife ATB.

chameleon

u sure about that? thought they were clutch type and quaife was gear.

Kengs

Quaife is a different kind of helical than Honda OEM.

BTW, I believe you need the FD from an ITR/CTR to make the OEM LSD work with the Si tranny.

Targa250R

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by chameleon &raquo;</TD></TR><TR><TD CLASS="quote">u sure about that? thought they were clutch type and quaife was gear.</TD></TR></TABLE>
No, they are both helical gear-operated LSDs.

chameleon

now if its a quaife made for a b16 tranny then what makes the quaife diff from a oem itr that would require the FD instead of just using the b16 FD?

and can a gsr FD be used isntead?

Cheap Bastard

Just put one in my Si 2 weeks ago. The bolt pattern on the B16A differentials are not the same as B18C differentials.

chameleon

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Cheap Bastard &raquo;</TD></TR><TR><TD CLASS="quote">Just put one in my Si 2 weeks ago. The bolt pattern on the B16A differentials are not the same as B18C differentials.</TD></TR></TABLE>

ok so what did you do in the process?

97itr86

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kengs &raquo;</TD></TR><TR><TD CLASS="quote">Quaife is a different kind of helical than Honda OEM.

BTW, I believe you need the FD from an ITR/CTR to make the OEM LSD work with the Si tranny.</TD></TR></TABLE>
We did my friends GSR using the stock FD. We did ctr 1,2,3 and LSD no problems with it.

Cheap Bastard

I have CTR/ITR ring gears. That's the only ring gear that will fit on a CTR/ITR LSD. If you want, I have a 4.4 CTR ring gear for sale.

glagola1

I didn't know B16 tranny diffs had different bolt patterns. Weird.

It is possible to put the diff in the case without using the exact size shim but I do not recomend it. I guess if you didn't know about the shim and subsequent bearing clearances you could think that your install was perfect

Cheap Bastard

I should clarify this. B18c/B16b have the same bolt pattern ring gear. B18b/B16a have the same bolt pattern ring gear.

chameleon

so how come the gsr tranny needs shimming of the case to make it fit?

Targa250R

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by chameleon &raquo;</TD></TR><TR><TD CLASS="quote">so how come the gsr tranny needs shimming of the case to make it fit?</TD></TR></TABLE>
All differentials require shimming to maintain the proper clearances inside the transmission case.

chameleon

ok.. someone had told me they had to shim the casing..