A few months ago I swapped out my stock d15b2 for a JDM d15b7 Sohc Vtec and while I had it out and apart from the tranny I put in a stage II clutch. Now my tranny is an 88 5 speed and I was told it had a differnt spline count from the other years. I was also told that it wouldn't bolt up to my new motor but athat was false information I guess cuz it was no problem. Now I was just wondering if I could buy an 88 crx Si tranny and drop it in? If not what would be the best route to go about putting in an si tranny? I would need new axles and knuckles right? Thanks in advance

 

use ur stock knuckles and axzles.... just slap in the Si tranny

 

sorry to say, no such thing as a JDM d15b7, the d15b7 is a USDM motor that came in the 92-95 civic DX. its possible that you have a d15b7 block, and a vtec head of some sort, but thats all it could be. as far as your tranny questions, an 88 CRX SI tranny will bolt right in, and you will be able to use your exsisting knuckles and axles. if you want to be able to use your exsisting clutch/flywheel setup, youll HAVE to use an 88 SI tranny. if you use an 89-91 SI tranny, youll have to get the clutch/flywheel setup for that year


[Modified by Braveheezy, 9:46 PM 11/6/2002]

 

he wants to ut the D series Si tranny.. the tranny spindle count for the axles its da same on all models...... but the knuckles one are bigger on the SI.... the DX and std ones are more slimmer... he can just keep his axles and knucles... happened to me last week when i changed my axles...


[Modified by JDM EF9, 11:47 PM 11/6/2002]

 

the 88-91 axles are the same respectively. an 88 DX axle is the same as a 91 DX axle. same with SI, HF, STD, etc. the only differences between the HF/SI axles and the DX/STD axles is the spline count on the hub side of the axle. DX/STD have 26 spines and SI/HX have 23. the spline count on the tranny side of the axle is the same for all USDM models 88-91

 

yeah.. thats what i was saying on my last post.... sorry if u misunderstood me

 

"sorry to say, no such thing as a JDM d15b7"

If you say so man. As far as I was informed is that it is the Japanese equivelent to the d16z6 since there is no JDM z6. I got the engine from a Japanese engine importer also and on hondadseries.com they have listings of info on the JDM d15b motors. So I'm sorta confused now . But anyway it's about the tranny. So I can just slap that B*tch in there?

 

yes, the tranny will bolt right in

there is a d15b that is a JDM sohc vtec motor, but it has no number at the end. easiest way to tell, look at the block and see whats stamped there.

 

Just to clarify some of the above info. The DX and Si use the same axles. The outer joint has 26 splines. The STD and HF also use the same axles. Those outer joints have a spline count of 23.

To address your other question about the 88 tranny. Braveheezy is dead on with his summation or the 88 and 89-91 tranny / clutch combos.


[Modified by wronghand, 12:14 AM 11/7/2002]

 

thanks for the correction, my mistake.

 

As long as it is the same year.

1988 = 190mm
1989 = 200mm
90-91 = 212mm

 

https://honda-tech.com/zerothread?id=98181

 

you'll have to count the splines on the mainshaft. 21 for an 88, 20 for 89-91. if that is what you are asking.