Identifying a CX/VX Transmission

[scostanz]

Are there some identiying marks on a CX/VX transmission that distinguish it from the other models? If not, how can one determine a CX/VX tranny by looking at it?

Thanks!

-- Scott

[lindermant]

see the notes section on the link below:

http://www.knology.net/~jediklc/gearratiosdseries.htm

hope this helps!

[SVOboy]

The one in my basement certainly is. It's for sale, of course.

[molecule]

i've got 2 cx/vx trannies as well 4 sale

j*f encoded on the sticker by the front torque mount
where * = letter/number
my memory mastery reminder for this is "Jah Fuel"
i'm not sure on how complete this is for identification of them on a regular basis...
of all the cx/vx trannies i've seen...3 or 4...they all had it...

[bense]

NO NO NO NO NO.

your best bet is to get an old clutch. mark it. Place the mark at 12 o' clock

push the shift rod into the trans, putting it in 4th gear (0.853)
mark the differential.

the final drive is 3.25, 4th gear is 0.853

3.25 * 0.853 = 2.77225

it should take 2.77225 full revolutions of the clutch to make one full revolution of the differential.

so it should turn 2.77 times and end up pointing a little after 9'o clock to make one full revolution.

and of course make sure that the sstamp near the oil fill plug says a000 instead of b000.

serial numbers mean nothing.

[scostanz]

Thanks for the advice everyone. I picked up a CX tranny a couple of weeks ago for $75 and it goes in the car tomorrow hopefully. The sticker says J8B and I did the suggested test and I ended up a little after 9 o'clock so I'm pretty sure it was not misrepresented by the seller.

-- Scott

[SVOboy]

I have one for sale as well, *cry*

[kwtorbe]

Is it possible to put an HF transmission in my '97 civic HX without to many modifications---I see the HF is cable while the later HX has hydro control.

[Matt Timion]

Originally Posted by kwtorbe

Is it possible to put an HF transmission in my '97 civic HX without to many modifications---I see the HF is cable while the later HX has hydro control.

Completely different mounts, pedals, etc.

is there a reason you want the HF transmission over the HX/CX/VX transmission? I'm pretty certain that the existing transmission will actually be longer geared than the HF transmission.

[SVOboy]

Matt, the HF has longer gearing than the vx/cx, which has longer gearing than the HX.

Anyway, yeah, you won't have much luck with it, I'd toss a cx transmission in if I were you (or vx, whatevs).

Here's the relevant gearing too look at: http://crxmpg.com/9200dgearing.html

[Matt Timion]

Originally Posted by SVOboy

Matt, the HF has longer gearing than the vx/cx, which has longer gearing than the HX.

Anyway, yeah, you won't have much luck with it, I'd toss a cx transmission in if I were you (or vx, whatevs).

Here's the relevant gearing too look at: http://crxmpg.com/9200dgearing.html

Odd... for some reason I thought the VX/CX was longer than the HF.

IN terms of ease of installation, availablity, etc., I'd say that a CX/VX transmission is the way to go.

[SVOboy]

I should've also noted in my post that you'll want a 92-95 cx transmission,

CRXHFFTW

[kwtorbe]

Thanks guys. Just wondering. Also, since I will be going from the OBDII '97 HX tranny to the 92-95 OBDI CX/VX tranny (assuming I find one), will i run into any problems with the Vehicle Speed Sensor (VSS) or anything like that...

[SVOboy]

The VSS might be different, I'd do a part number search, but I'm fairly confident that even if the shape of it is different the old one will fit in the new hole or if you have a cx/vx one it'll plug into the old harness.

[kwtorbe]

Thanks--Good to know.

[scostanz]

In my case, I used the VSS sensor that came with my CX tranny. It actually improved the accuracy of my speedo a bit. I went from about 3% too high to about 2% too low. I'd keep the one that is in the tranny if it is still there.

-- Scott

[kwtorbe]

Okay, I found a transmission for $150 out of a '92 4-door (don't know the model), the seller gave the ID number as S20-1185791. Does this tell anything about the transmission or is it merely a serial number?.... Also cx and vx were only 2 doors right?

[SVOboy]

CX and VX were only two door hatches, that tranny is prolly no good.

[NickF829]

Originally Posted by molecule

i've got 2 cx/vx trannies as well 4 sale

j*f encoded on the sticker by the front torque mount
where * = letter/number
my memory mastery reminder for this is "Jah Fuel"
i'm not sure on how complete this is for identification of them on a regular basis...
of all the cx/vx trannies i've seen...3 or 4...they all had it...

on my vx, the tranny says S2O as the first 3 characters on that sticker with a barcode on it... does this mean its now a vx/cx tranny? if so, what tranny is it from?

**edit** i found the stamp near the fill plug on my tranny, it indeed says A000, so i guess i have the right trans

thanks

NICK

[kwtorbe]

Hey guys, thanks for the info. I finally got a CX tranny from ebay w/ 110k miles for $41. It didn't come with the VSS or clutch slave cylinder.... I was hoping I could use my '97 VSS and clutch slave cylinder in the '95 CX tranny. Will it work?

[kwtorbe]

I finally installed my CX tranny in the HX and got over 50mpg! This is the first modification I have made that has made a drastic impact on FE and I am tickled pink!

[SVOboy]

Good stuff!

[Ryland]

I assume you swaped out a 5 speed for another 5 speed? can you give us any info on the change in engine speed, problems incountered while doing the swap, and how much of your improvement was due to driving style and how much of it was due to the new transmision?
Do you have a scangauge? it's new enough.

[bense]

Originally Posted by SVOboy

Here's the relevant gearing too look at: http://crxmpg.com/9200dgearing.html

These ratios aren't entirely accurate. You got these from the knology site which has a few errors.

Originally Posted by kwtorbe

Hey guys, thanks for the info. I finally got a CX tranny from ebay w/ 110k miles for $41. It didn't come with the VSS or clutch slave cylinder.... I was hoping I could use my '97 VSS and clutch slave cylinder in the '95 CX tranny. Will it work?

Yes.



I'm not sure if you guys realize this. But HX's have been known to have the b000 on the stamp near the fill plug. A few 3.25 final drives from the cx/vx have been found in the hx trans. HX trans have a 3.7222 final drive with a 0.702 5th gear.

Most HF trans have the final drive of 3.25, not 2.95 like the knology site lists. I believe its only the 1988 HF that came with the 2.95 final drive. The only problem is that the spline count on the input shaft for the 1988 trans is different, so you'd have to swap clutches and pressure plates. So the only real feasable HF transmission is the 3.25 version. So the only difference in your cruising gear is the 5th gear of 0.694 instead of 0.702. We're talking 1.1% difference in gearing. Not enough for any of you guys to notice. We're talking 30rpm less per minute if that.

[kwtorbe]

My HX had the 3.72 gearing. At 65mph it cruised at 2500rpm. Driving technique was keep at or below 65mph, shift at 1500rpm between gears.

Now, with the 3.25 CX tranny I drive 65mph at 2100rpm. The gears are alot longer so I can easily hit the 1500rpm shift point in 1st. It is slower and I do lug the engine alittle now taking off because of the longer gears.

I have consistently got 43-45mpg with the HX while trying my hardest to get my previous goal of 50mpg. Now I drive the same way and I am able to pul out alittle over 50mpg. It is the gears and I suggest this swap to any gassaver without a doubt.

One thing to mention is that the faster I go the more I notice the longer gearing. The first thing I did with the car once it was on the road was take it on the highway. I went 80mph and was at 2700rpm rather than 3700rpm. That final drive gear is LONG. Honestly it was easier to cruise at 65mph with the HX transmission because the rpms were higher. Now I can go 70 and still have lower rpms than 65 with the HX. I just have to watch the speedometer more now....

[kwtorbe]

Oh yeah, no problems with the 5-speed to 5-speed swap. I bought new driveaxle seals from Honda for about $10 each. I also installed a new ebay clutch kit. It cost $85 shipped and was an exedy oem style. This clutch is softer than my other clutch and took alittle getting used to. The hardest part of the job was aligning the transmission with the clutch on the engine. I ended up rotating the engine very slowly while my dad shook the transmission back and forth. Total install time was 4 hours including travel time for tools from the house to our shop.

My buddy with a 2000 Si wants me to install the HX tranny in his car for better FE. When installing a d-series onto a b-series I am guessing I need d-series driveaxles, HX tranny, and d-series flywheel and clutch (or just clutch?). Is this correct? Is it better to use the HX flywheel/clutch or the Si flwheel with d-series clutch.

I heard they bolt up fine and any info is appreciated. His rpms are WAY high with the Si tranny....4.400 final drive.

[kwtorbe]

Originally Posted by scostanz

Thanks for the advice everyone. I picked up a CX tranny a couple of weeks ago for $75 and it goes in the car tomorrow hopefully. The sticker says J8B and I did the suggested test and I ended up a little after 9 o'clock so I'm pretty sure it was not misrepresented by the seller.

-- Scott

My CX tranny also had J8B on the serial stickers.

[scostanz]

Originally Posted by kwtorbe

Now, with the 3.25 CX tranny I drive 65mph at 2100rpm. The gears are alot longer so I can easily hit the 1500rpm shift point in 1st. It is slower and I do lug the engine alittle now taking off because of the longer gears.

What size tires are you running? I'm running about 2500 at 65 with my CX tranny with 175/70/13's.

[scostanz]

Originally Posted by scostanz

What size tires are you running? I'm running about 2500 at 65 with my CX tranny with 175/70/13's.

I mis-spoke earlier. I'm running 2250 rpm at 65 with 175/70/13 tires. I apologize for the bad info, need to avoid doing things quickly when I'm tired. :0

-- Scott

[be_good_customs]

who's the guys with the vx trannys i need one rater quickly drop me an email begoodchopshop@chicagoz.com