[Ennis_D]

iTrader: (1)

I am in the market for a PL3 89-91 Civic/CRX Si cable tranny. I have a seller that I am in the middle of making a deal with but he and I want to be 100% sure as to what tranny he has.

Here are the pics he has sent me:









Now, I have been referring to information found in this thread in order to properly identify PL3 transmissions: what to look for to identify si tranny?

Specifically within that thread, I have extracted the following things:


From the above, we can conclude 100% that the tranny is a 90-91 20 tooth clutch spline. Here is where we are stuck:

The PL3 stamp in the first photo reads "PL3/Axxx". According to the above information, any "PL3/Axxx" tranny is either a DX/HF/STD small bearing case tranny and not a PL3 Si cable tranny. I am not sure if by the gold sticker you could tell other wise, or any other markings on the tranny. Here is where I turn to you guys with insight on the subject.

From the above pics from seller, information and pics provided from above thread, could somebody please clarify which tranny he and I are dealing with here? If you could, I know we would both greatly appreciate it!

Thanks in advance for your time, input, and replies!

sh!ft

i(as the seller) would also like to know this as well. i recently tried calling synchrotech transmissions, but no answer. and since this is a D series transmission, this is a different ball game for me that i lost interest on and never picked up the knowledge on these transmissions like i did with b series.

BiG ChOr!Zo

iTrader: (1)

If you pop out an axle seal you can measure the inner bearing surface on the diff.

40mm=si
35mm=non si

https://honda-tech.com/forums/honda-crx-ef-civic-1988-1991-3/si-tranny-35mm-40mm-1956466/

BiG ChOr!Zo

iTrader: (1)

measure the distance as highlighted by the red line from corner to corner...!!!

[Ennis_D]

iTrader: (1)

Big, good info! I read in the thread I posted about measuring the axle seal but either a pic wasnt posted or link was no longer valid. Greatly appreciated!

sh!ft, we will get this figured out bud. Its good info to know as well!

BiG ChOr!Zo

iTrader: (1)

the info i posted above is the best way to tell them apart...i have had a couple trannys and that method of identification worked perfect.

other great way to tell if the tranny is still in the car is to take it on a cruise on the freeway in 5th gear...if your cruising at 65 mph at 2200 rpm then its a dx...if your at 3200 at the same speed then its a si tranny.

[Ennis_D]

iTrader: (1)

Knowledgeable man! Thanks for the input. Hopefully this will help sh!ft and I figure out which tranny he has! Thanks again man!

sh!ft

what would that measure out to in inches?

BiG ChOr!Zo

iTrader: (1)

35 mm = 1.37795
40 mm = 1.57480

[Ennis_D]

iTrader: (1)

Big, according to the above rotation test I posted, sh!ft said it looks to be a HF tranny.

I am looking for a tranny to mate with a z6 for my dd ef. I drive some city majority highway. I know the HF would be better on gas but how much would it hurt the "power" of the z6? How much longer, or worse, would a HF tranny be w/ a z6 compared to a DX tranny?

BiG ChOr!Zo

iTrader: (1)

im not familiar with a hf tranny sorry...!!!

sh!ft

zomg im wrong! i thought the hf was by the dx mark/indication! it IS an si trans! wow im a dumb ***, i should have double checked before i opened my mouth! sorry man it is in fact an si transmission. now that i came back to look at the positions.