bheiman

Ok, i was driving and wasnt really doing much, did a couple pulls but thats it. was on the interstate and down shifted to 4th and did a pull for my friend to show him how the twins work. And i shift into 5th and there is nothing there. I pull over, and its stuck in 5th. Well i get it out and when im in gear all it does is spin the driveshaft just a little bit and locks up. I tried having him push me but it is just binding up. I put it in nuetral and it is reverse?

any ideas what happened, i have a jdm transmission with about 30k on it that i bought on here.

quicksilver_rx7

You guys have got to do better at picking your titles for these trans. threads. I was kinda reluctant to open this one.

bheiman

well anyone have any answers though?

NewbernD

iTrader: (1)

Sounds like you broke a shift fork, leaving it in 5th gear. Now when you shift to any other gear other than 5th or neutral, you've engaged 2 gears.. not much you can do without pulling it apart.

bheiman

ok, that sounds about right, would that cause neutral to be reverse though?

dgeesaman

iTrader: (7)

Yep, if it's stuck in reverse.

You might consider yourself lucky - if the damaged stuff is all in the 5th/rev section of the tranny, you'll be able to fix it for about the labor of the 5th synchro. Which is a lot less than a full rebuild.

Dave

bheiman

ok, well what about if i do it all myself?
I have a spare transmission sitting around, but the output shaft cracked.
its not a jdm one though. would that make any difference? and its 5th gear synchro was getting bad.

Basically i cannot move forward, only backward. forwards in any gear even with the clutch in is bound up.
But i can move forward with the clutch in in reverse (or neutral because it is reverse now)

how hard is it to dig into the tranny. I did the differential myself without any help.
Would i just have to be careful? I am pretty good at working on things, i never have gone to a shop.

SkylarNeedsParts

wow..i talked about getting a 5th gear synchro replaced and it is a BIG deal. RP quoted me 9 hours of work just to get the tranny out, torn apart, synchro replaced, tranny put back in....and he does this all the time...

dgeesaman

iTrader: (7)

IMO it's not bad, just time consuming. You'll need to make a bearing puller.

I did a full write-up at www.davidgeesaman.com

Dave

bheiman

yea, i can get the tranny out and in easily, its just ive never dug into one before.
Has enyone fixed the shift fork before?

JDK

iTrader: (8)

Nice write up Dave....It will come in handy next weekend...Thanks for posting

dgeesaman

iTrader: (7)

Hey if any of you guys find a better way of doing things, please snap a pic, I'll add it to the writeup, and credit you.

For example, I'd love to to try the dual pry bar method of pulling bearings that are seated in the housing. But I haven't, and I certainly don't have a picture of it.

Dave

dgeesaman

iTrader: (7)

It shouldn't be hard. The 5/R fork is the first one you will have access to, and if you find that it was broken, you can replace it and test the rest all the gears without tearing down further.

If you're interested, I bought a bunch of parts for my rebuild beforehand, including new shift forks. I figured mine would be worn down and new forks might tighten things up - I don't think it mattered at all. They weren't even close to being out of spec, but I replaced them anyway and saved the old ones. So if you want some used shift forks in very good condition I'll sell them for a good price.

Dave

bheiman

actually i got another whole tranny but the out put shaft is cracked
And it had a rebuild a few years ago