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-   Suspension, Brakes, Drivetrain (https://www.miataturbo.net/suspension-brakes-drivetrain-49/)
-   -   Has anyone rebuild a 6 speed? (https://www.miataturbo.net/suspension-brakes-drivetrain-49/has-anyone-rebuild-6-speed-51808/)

chicksdigmiatas 09-19-2010 03:43 PM

Has anyone rebuild a 6 speed?
 
I just picked one up that needs a rebuild from a forum member. Does anyone know where to get a rebuild kit? I googled that crap but couldn't find anything. I plan on documenting it here. Or I guess i could be cool and make a build thread though. Although there is a ton of shit i have not documented. Either way. Someone send me a link for a rebuild kit. Kthnxbai.

neogenesis2004 09-19-2010 04:37 PM

You will probly have to buy the parts you need once you have it apart. Someone can send you a link to the 6spd service manual pdf. Just figure out what parts you need, then look up the part numbers in the manual, then call/email finishline to order them. That is pretty much the play by play you need to follow.

chicksdigmiatas 09-19-2010 05:58 PM

I gots the FSM thanks. I bought a rebuild kit for my 5sp from the zone and it worked out well. They don't have one for the 6sp.

GDSpeed 09-20-2010 09:21 PM

Just FYI, I found this source when I was searching for myself - no affiliation

http://www.drivetrain.com/parts_cata...rhaul_kit.html

chicksdigmiatas 09-21-2010 12:09 AM

Awesome awesome link. Thank you. Anyways I am going to start documentation of what i am doing. Good first post. Now go make an intro thread.

Anyways. I started with this.

http://memimage.cardomain.com/ride_i...4004_large.jpg

It needs a rebuild. I was told 3rd gear synchro is probably bad and it gets stuck going into reverse sometimes.

I took down the extension housing and didn't really document it. It is very straight forward if you follow the FSM. This is what you will end up with.

http://carphotos.cardomain.com/ride_...4018_large.jpg

Next you remove the snap ring holding on 6th gear and the synchros and such. This is the method used in the FSM.

http://carphotos.cardomain.com/ride_...4021_large.jpg

Watch out. This little shit will shoot off quick fast and in a hurry. Measure then put on the snap ring sheet. I used tape so it wouldn't float away.

http://carphotos.cardomain.com/ride_...4022_large.jpg

This is what it looks like once you find where it shot to.

http://carphotos.cardomain.com/ride_...4016_large.jpg

Next you remove the interior shift lever and interlock sleeve.

http://carphotos.cardomain.com/ride_...4015_large.jpg

http://carphotos.cardomain.com/ride_...4011_large.jpg

Now we have the substitute for SST 49 N017 2A1. A harmonic balancer puller does this job well, better for this than pulling harmonic balancers if you ask me. I covered it with a rag so pieces of the synchronizer clutch would not fly everywhere.

http://carphotos.cardomain.com/ride_...4009_large.jpg

The syncro clutch hub is bagged in a smaller bag, then there are the synchro (the brass thing), the syncro ring (the silver ring), and then the shift fork. These are all going into the bag labeled 6th gear.

http://carphotos.cardomain.com/ride_...4008_large.jpg

6th gear, needle bearings and the washer. The washer is magnetized. Also, there is a small pin on the shaft where the washer locks on to. DO NOT LEAVE THAT THERE. Put it in your 6th gear bag or you will lose it. I searched for that bastard as long as I did the magical flying snap ring.

http://carphotos.cardomain.com/ride_...4010_large.jpg

My 6 speed sans 6th gear.

kenzo42 09-21-2010 02:40 AM

Cool thread. Keep it up.

chicksdigmiatas 09-21-2010 03:18 PM

I plan to. I am actually kind of stoked, I found out the base auto hobby shop has a press I can use for a dollar an hour. Now all I have to do is find substitutes for the other SST's that are used and I am done worrying about getting all the tools and worrying about how i am going to get this done. Honestly, the thing that bothered me the most was getting access to a press.

chicksdigmiatas 09-22-2010 09:17 AM

I did more last night. I will post pics when i get some free time. I can't do it at work.

GDSpeed 09-22-2010 10:35 AM


Originally Posted by chicksdigmiatas (Post 632555)
Awesome awesome link. Thank you. Anyways I am going to start documentation of what i am doing. Good first post. Now go make an intro thread.

Glad that helped, intro post in process:noob:

chicksdigmiatas 09-23-2010 11:40 PM

Trying to start where I left off.

http://carphotos.cardomain.com/ride_...4023_large.jpg

Remove this bearing cap. There is a peg and snap ring to remove under this.

http://carphotos.cardomain.com/ride_...4024_large.jpg

Close up of said snap ring and peg. Snap ring on the right. This needs to be replaced after removal. Clearly. If I have to paint shop that for you I will. Remove that peg as well.

http://carphotos.cardomain.com/ride_...4025_large.jpg

One of these on the side and bottom. Remove both. There is a spring and ball in there. The bag marked spring and detent balls, put this crap in there. The FSM details the bags to make. You will probably make more though. Something worth noting here. The FSM says theses are T30's, but mine were T40's. Don't strip your crap. One was a bitch to remove after I reamed it out.

http://carphotos.cardomain.com/ride_...4030_large.jpg

Remove this plug in the bellhousing. 10mm hex.

http://carphotos.cardomain.com/ride_...4029_large.jpg

Remove shift rod. 2 balls are supposed to fall out. Guess how many did? None. Failboat. I found one of them later.

http://carphotos.cardomain.com/ride_...4026_large.jpg

Start removing the case. 9 12mm bolts.

http://carphotos.cardomain.com/ride_...4027_large.jpg

After some prying your case is gone and you have some really awesome gears showing. More to come.

leatherface24 09-24-2010 10:58 AM

This is really really helpful. Keep it up

chicksdigmiatas 09-25-2010 07:51 PM

Yay more shite!

http://carphotos.cardomain.com/ride_...4032_large.jpg

Remove the front cover. Pry off through the shift fork hole.

http://carphotos.cardomain.com/ride_...4033_large.jpg

After this, remove the 2 snap rings so that the 2 shafts can not so gently slide (be hammered) out.

Take a piece of wood. I used one that was approx 1.25 x 1.25 and hammered the piss out of the countershaft. Both main and contershaft will come out along with rods and shift forks. The input shaft will separate from the main shaft.

http://carphotos.cardomain.com/ride_...4034_large.jpg

So you get something like this.

http://carphotos.cardomain.com/ride_...4035_large.jpg

And this. Next we measure the shift forks and the selectors on the shaft. There is 1/2 3/4 5/R and 6th.

http://carphotos.cardomain.com/ride_...4036_large.jpg

Measure the fork where it engages the selector clutch hub.

http://carphotos.cardomain.com/ride_...4037_large.jpg

Now measure the selector clutch hub.

All my stuff was within spec. It would shift to reverse, but not go sometimes I was told. I was expecting a problem with the 5/R fork but there wasn't. I looked at the selector thing on the trans too, and it looked fine. I have to disassemble the countershaft to investigate 3rd gear syncro. Also, I saw a rough spot on the 3/4 shift fork where it engages the selector hub. Maybe just an imperfection on the metal.

Another thing. This is the first tranny I have ever taken apart with out a sledge hammer. I have really no clue what I am doing. So if anyone has guidance let me know.


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