Hey guys, I'm working on a 1989 Honda Civic DX Hatch. Engine Code D15B2. I have the transmission out already and now I'm having a problem finding the right clutch disc that will fit. I tried 3 different parts stores brands vary from Valeo, Exedy, and Autocomp thinking that maybe it was after market but all of them still gave me the same problem. The problem I'm having is that the bore size on the new clutch disc does not fit into the shaft of the transmission. The pilot bearing, the pressure plate, throwout bearing, are correct. The only thing that doesn't fit is the clutch disc. I already had one parts store try to match it up but they came up with nothing. Another place is also looking into it. I was wondering if anyone has ran into this problem before. If so let me know what the problem was. I'm thinking that the transmission could be possibly from a different year civic that was swapped over. Thanks.


Modified by oo9o9xaznoo at 1:35 AM 1/3/2008

 

the transmission is probably from an 88 model, which would mean you need 88 Si clutch disc (assuming you have 89 flywheel)

 

Try another year!! Could have been one of those weird issues with the half year productions. Whats the code on your tranny?? It could a si tranny or the dx tranny but different year

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jlicrx &raquo;</TD></TR><TR><TD CLASS="quote">the transmission is probably from an 88 model, which would mean you need 88 Si clutch disc (assuming you have 89 flywheel)</TD></TR></TABLE>

WRONG. We just had this problem, the 88-89 output shafts have different spline numbers on the shaft. The 90-91's have different output shaft spline number. This also makes the clutches different as well. Make sure your parts supplier acknowleges that there are different shaft sizes for the different years.


Modified by whiteknightef at 9:41 AM 1/4/2008

 

Bought a Clutch Kit from a 88. It worked. Production date was actually 8/89. Maybe it was because it was a canadian model? Don't know.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by whiteknightef &raquo;</TD></TR><TR><TD CLASS="quote">

WRONG. We just had this problem, the 88-89 output shafts have a larger shaft. The 90-91's have a smaller output shaft. This also makes the clutches different as well. Make sure your parts supplier acknowleges that there are different shaft sizes for the different years.</TD></TR></TABLE> I'm going to have to deny that claim, as I switched from a 1990 SI transmission to an 89 and retained the same clutch disc. But maybe I had a fluke, IDK, I'll have to dig up my clutch catalogs to quadruple check.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dr_latino999 &raquo;</TD></TR><TR><TD CLASS="quote"> I'm going to have to deny that claim, as I switched from a 1990 SI transmission to an 89 and retained the same clutch disc. But maybe I had a fluke, IDK, I'll have to dig up my clutch catalogs to quadruple check.</TD></TR></TABLE>

well you definatly had a fluke! the 88-89 have different spline numbers and that is THE TRUTH and IS FACT. There might be a half or 3/4 year change but not sure. Ive had this problem many times with 89 trannies in 90-91 cars. SORRY FOR THE FACTS!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by whiteknightef &raquo;</TD></TR><TR><TD CLASS="quote">

well you definatly had a fluke! the 88-89 have different spline numbers and that is THE TRUTH and IS FACT. There might be a half or 3/4 year change but not sure. Ive had this problem many times with 89 trannies in 90-91 cars. SORRY FOR THE FACTS!</TD></TR></TABLE> Is well established that the 88 shafts have a different spline count, and it is also well established that 88,89, 90+ have different clutch face sizes, but nowhere has mentioned 89 to 90 having a different diameter input shaft nor the 89 having different teeth.

 

Remember also that people DO swap stuff out. For instance, someone with a 1989 Civic might blow their transmission, and pick up a 1988 transmission REALLY cheap somewhere. So they also pick up the flywheel and clutch for an extra $5 (or so) and slap it in to make the transmission work. For instance, my 1988 B20Z Civic 4DR originally came with a JDM D15B non-VTEC and a 1989 SI transmission.

 

'88 transmission = 21 spline mainshaft, 190 mm disc
'89 transmission = 20 spline mainshaft, 200 mm disc
'90-'91 transmission = 20 spline mainshaft, 212 mm disc

I believe their is a step height change in the flywheels as well, but I can't be certain. I believe the 90-91 flywheels have a -0.065" step height, while the 88s and possibly the 89s have a flat surface. I might be mistaken though.

You can mix and match some parts if everything is compatible. I have a '88 CRX Si. I had a 90-91 flywheel, 90-91 pressure plate, and 90-91 clutch disc installed. Some people install an accord clutch disc for a '88 transmission due to the 21 splines and to get the 212 mm size. The shop I took my vehicle to had a junked Si transmission with a 20 spline mainshaft, so we swaped mainshafts (I was having syncros put in anyway) so I could use the std 90-91 clutch discs.

 

well I personally know that the spline number changes the diameter because the clutch disk will fit over the shaft but not match the splines.

Oh..... how much d-series work have you done anyways?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dr_latino999 &raquo;</TD></TR><TR><TD CLASS="quote"> Is well established that the 88 shafts have a different spline count, and it is also well established that 88,89, 90+ have different clutch face sizes, but nowhere has mentioned 89 to 90 having a different diameter input shaft nor the 89 having different teeth.</TD></TR></TABLE>

I know about the splines, I wasnt born yesterday. Its different between 88, 89 and 90-91 for the clutch sizes, FACT

Fly wheels are different too.

drive shafts too.......

anything else you want to comment on? thread done.