96 Civic DX d16y7 mated with a 94 CX transmission -Problems help
 

Hi guys, im new posting to this forum but I've been reading different threads for a while now. I have a 96 Civic DX d16y7 coupe and I just did a 94 CX Transmission swap. The 94 CX transmission is the same as the VX transmission from what i read.

Well I did the swap twice already with two different CX transmissions and I get this grinding noise, whirring sound in 1st 2nd 3rd gear then goes away. I thought the input shaft bearing was bad on the first CX trans so I picked up another cx trans and still the same thing. So I compared the stock DX trans with the first CX trans and the transmission case is somewhat different. On the DX trans the throwout bearing has a bump that rests on when the clutch pedal is not stepped on so that the throwout bearing sits flush the the clutch fingers.

On the CX transmission there is no bump and the throwout bearing sits further back when clutch is not being stepped on. I think the throwout bearing is rattling around and rubbing on the clutch fingers. Plus on the first CX trans the flywheel teeth seemed to have some scrapings around the housing.

Has anyone did this swap and had problems like this? Im frustrated, im about to change the clutch out on this second cx trans in hopes I had a faulty clutch. Time and money is starting to get wasted. Need some help guys!!

Help!!

Can you post pictures of the two bell housings? No difference in the honda part number for the throw out bearings.

One way to check if the noise is the input shaft bearing is to put the trans in neutral, start the car, and press in the clutch pedal / release the clutch pedal all while listening for any differences. If the input shaft bearing is going bad you will be able to hear it while the clutch pedal is up - it will conversly go away when the clutch pedal is pressed. I had a bad input shaft bearing on a B series and you could easily hear it over the motor while sitting in neutral.

How many miles are on the clutch? check the throw out bearing arm - I've had the spring clip pop off of the post that is supposed to hold it in the bellhousing.

on some ot the vw bugs when changing to 12volt you have to take the drummel to the bell housing to clearance the 12volt flywheel . easy and does not effect the strength

I'll take some pictures this weekend, yah i figured i dremmel some of the metal of the bell housing but my main concern is the where the throwout bearing rest when the clutch is not pushed, the DX trans has a bump where it the fork and throwout sits. The VX does not, in result there is a play area for the bearing to move around in.

check out the part numbers for the throw out bearings to see if they are the same I suspect they are also check the throw out fork that may also be the same if it is , then I suspect the play should,nt be the grinding problem. maybe someone else has a thought on this,a honda guy

I'm in the middle of considering almost this exact swap. Got a quote on a good CX tranny yesterday for my 1998 DX, so I am very interested. A quick search reveals this: 94 civic cx transmission on 94 dx, gear noises - Honda-Tech

Good luck! Subscribed.

thank you california98civic ,Dztech28-aint gona be happy.I picked up on the flywheel teeth have some scraping, blurp or I would'nt have suggested the drummel.

I bought my 97 CX (also 16y7) with a bad transmission and installed a J5F VX trans to replace it. Trans ISB was bad so I just swapped it for a VX trans I picked up of Craigslist for $150. While I had it appart, I put in a new autozone clutch kit (clutch, pressure plate, pilot and throwout bearing). No issues at all after the swap.

I would have guessed it to be an internal issue, but with two transmissons doing the same problem? that normally points to something else. Is it possible you damaged a bearing in the swap?

Hope you figure it out as that transmission is awesome!

Keep in mind that bad input shaft bearings and worn 1-2-3 syncros(your grinding?) are EXTREMELY common in Civics. Don't rule out a repeat problem after two transmissions. I've had 4 different transmissions in my Civic and every one has had these problems to varying degrees.

I used an xtr clutch from ebay, the whole kit. i also installed a new flywheel from Oriley autoparts. The gears mesh fine and its really loud like the flywheel teeth are rubbing around the bell housing. Gonna redo everything at the end of this month. New clutch and inspect where things might be rubbing. I still drive the car, just annoying.

its way too loud for a drive gear. it sounds more like the flywheel teeth are rubbing on something when the sound comes. It sounds like putting a card on the frame of your bike so that it can flick through the spokes of the wheel so you can sound like a harley. Im thinking the throwout bearing is not sitting on the clutch fingers or the flywheel is rubbing on the bell house. both sound the same for the two CX/VX trannies that ive had in.

i just replaced the trans in my moms 95 civic for the input bearing noise. it sounded terrible!! one thing i noticed when i had them next to eachother, i grabbed the old one and i could move the input shaft up and down like an eight of an inch. i tried the same thing on the junkyard trans i got and it didnt move at all. makes no noise.

Any progress planned for the weekend? I hope so. The dremel suggestion seems like a pain but at least a solution.

If you can drive the car.

Get it going 25 MPH, shut off the engine, in 5th gear with the clutch disengaged (pedal to the floor).

Downshift progressively to 1 st gear as you coast down from 25 MPH.

With the engine off the flywheel is stationary, the clutch disc is spinning between the flywheel and clutch pressure plate. Any flywheel problem will not exist with the flywheel stationary.

As you downshift the imput shaft bearing noise (assuming it has one) will get progressively worse.

Next put it in neutral with the engine running and put your ear on the shifter. Depress the clutch and see if the noise goes away. This is another indication of a bad imput shaft bearing. If you only hear it depressed then it is a bad throwout bearing.

While the coincidence of two different transmissions having the same problem is unusual, a typical problem like bad imput shaft bearings would definitely mean there could be two trannys with exactly the same problem.

Thats why they were removed and sold by unscrupulous people. We had an attic full of transmissions with bad imput shaft bearings we used for parts, but they were for Nissan Z cars (used to be Datsun). Typically they all neeeded that bearing by 150 k miles.

If you go into the tranny replace all of the bearings, or put wing nuts on it so you can get it out faster on the repeat R&Rs. We always had people who questioned our procedure, thinking we only needed to replace one bearing. I told them they could specify we only replace one, but they could potentially end up pulling the tranny 6 times at $150 a pop.

regards
Mech

I compared a VX, CX, and 97 CX transmissions and did not notice any differences that would hinder it from working. Can post pictures if you like.

Any progress with this problem? It would be useful to hear the resolution, if there was one. I hope all is okay.

+1 any update would be helpful

Hope these help.
CX
http://i196.photobucket.com/albums/a...vr41991/CX.jpg
VX
http://i196.photobucket.com/albums/a...vr41991/vx.jpg
97 S40
http://i196.photobucket.com/albums/a...1991/97S40.jpg
CX left and 97 S40 right
http://i196.photobucket.com/albums/a...CXand97S40.jpg
VX left and 97 S40 right
http://i196.photobucket.com/albums/a...vxand97S40.jpg

All the d series trans are completly interchangable. they are faulty very common or you put the clutch in wrong or got a bad kit.

I'm hoping to do this swap in the coming weeks (hopefully before mid-January). I've got a 97 Civic DX with an EX transmission that I will be swapping with a VX transmission. I'll post back here with my results.

Thanks for all the info from the respondents!

just went over this post again , HOW ABOUT THE STARTER STICKING/HANGING UP A LITTLE. what do the flywheel teeth look like