Driveshaft will not slip all the way into transmission (6sp swap). - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Suspension, Brakes, Drivetrain discuss the wondrous effects of boost and your miata...

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 08-11-2018, 04:04 PM   #1  
Junior Member
Thread Starter
 
Join Date: Feb 2017
Location: Apple Valley, California
Posts: 124
Total Cats: -17
Default Driveshaft will not slip all the way into transmission (6sp swap).

Hey guys, I'm RIGHT at the end of my FM1/6sp/3.63 rear end swap (going all in). Everything went... Surprisingly well tbh. Except right at the end, I go to slip the driveshaft into the transmission and it goes about 75% of the way but will not go any further.

I can tell it's not going in all the way because I can see where the yoke is shiny from previous installation.

It's not going in far enough to get the driveshaft onto the diff.

I looked inside the trans, I have a camera probe, see nothing. Looks clear.

If I push it in as far as it will go currently(not even hard mind you...)it gets stuck, and I have to take a hammer to it to get it out.

I did try tapping on the rear of the driveshaft with a rubber mallet to get it to go in, did nothing (it was getting stuck before this, so it's unrelated).

If I put the car in gear, I can't spin the driveshaft, so I know it's going in at least over the splines.

I did replace the tailshaft seal, but I was extremely careful getting it out. Didn't even stick anything down or near the output shaft on the trans.

Splines look ok on both ends.

Any advice from anyone will be greatly appreciated. I'm really excited to be driving with the new stuff.


Oof, I should add my car is a 95 (not a 95.5). I'm swapping from stock clutch/5-speed/4.1 rear end.

​​​​

Balto is offline   Reply With Quote
Old 08-11-2018, 04:56 PM   #2  
Moderator
iTrader: (11)
 
sixshooter's Avatar
 
Join Date: Nov 2008
Location: Tampa, Florida
Posts: 17,239
Total Cats: 1,918
Default

Look in both the holes
sixshooter is offline   Reply With Quote
Old 08-11-2018, 05:03 PM   #3  
Junior Member
Thread Starter
 
Join Date: Feb 2017
Location: Apple Valley, California
Posts: 124
Total Cats: -17
Default

Yea I just was, it looks like the output shaft splines on the trans are twisted. Wtf? How does this even happen?
Balto is offline   Reply With Quote
Old 08-11-2018, 05:21 PM   #4  
Cpt. Slow
iTrader: (25)
 
curly's Avatar
 
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 12,349
Total Cats: 563
Default

curly is offline   Reply With Quote
Old 08-11-2018, 06:18 PM   #5  
Ich verstehe nur Bahnhof
iTrader: (4)
 
psyber_0ptix's Avatar
 
Join Date: Mar 2012
Location: Northern VA
Posts: 4,208
Total Cats: 412
Default

Is your PPF cracked where that thing is welded?
psyber_0ptix is offline   Reply With Quote
Old 08-11-2018, 06:26 PM   #6  
Junior Member
Thread Starter
 
Join Date: Feb 2017
Location: Apple Valley, California
Posts: 124
Total Cats: -17
Default

Quote:
Originally Posted by psyber_0ptix View Post
Is your PPF cracked where that thing is welded?
Nah it's not. It does look like it though.

I just got the trans back out again. I can confirm 100% the output shaft is broken. It's twisted like the barrel of a gun, and it's sheared right where the driveshaft sits inside when it's bolted up to the diff.
Balto is offline   Reply With Quote
Old 08-11-2018, 06:50 PM   #7  
Moderator
iTrader: (11)
 
sixshooter's Avatar
 
Join Date: Nov 2008
Location: Tampa, Florida
Posts: 17,239
Total Cats: 1,918
Default

Where are you located?
sixshooter is offline   Reply With Quote
Old 08-11-2018, 06:54 PM   #8  
Junior Member
Thread Starter
 
Join Date: Feb 2017
Location: Apple Valley, California
Posts: 124
Total Cats: -17
Default

Quote:
Originally Posted by sixshooter View Post
Where are you located?
SoCal. San Bernardino specifically (that's where I live), however the car is in Apple Valley at my parents where all my tools are.
Balto is offline   Reply With Quote
Old 08-11-2018, 06:58 PM   #9  
Moderator
iTrader: (11)
 
sixshooter's Avatar
 
Join Date: Nov 2008
Location: Tampa, Florida
Posts: 17,239
Total Cats: 1,918
Default

Maybe someone who has blown up a 6speed can send you that shaft and you can swap it.
sixshooter is offline   Reply With Quote
Old 08-11-2018, 07:19 PM   #10  
Junior Member
Thread Starter
 
Join Date: Feb 2017
Location: Apple Valley, California
Posts: 124
Total Cats: -17
Default

Quote:
Originally Posted by sixshooter View Post
Maybe someone who has blown up a 6speed can send you that shaft and you can swap it.
I don't have the tools or expertise to do it myself.

The seller (who is a member here hence why I haven't said names) is offering a full refund. I think I'm gonna go with that and just turn around and use the money to replace the shaft. There is a great transmission shop up here by my parents. They rebuilt my little bros jeep transmission and 80k miles later it's still going great.
Balto is offline   Reply With Quote
Old 08-11-2018, 08:10 PM   #11  
Junior Member
Thread Starter
 
Join Date: Feb 2017
Location: Apple Valley, California
Posts: 124
Total Cats: -17
Default

Best pics I could get.


Balto is offline   Reply With Quote
Old 08-11-2018, 10:10 PM   #12  
Moderator
iTrader: (11)
 
sixshooter's Avatar
 
Join Date: Nov 2008
Location: Tampa, Florida
Posts: 17,239
Total Cats: 1,918
Default

Torque
sixshooter is offline   Reply With Quote
Old 08-11-2018, 11:35 PM   #13  
Cpt. Slow
iTrader: (25)
 
curly's Avatar
 
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 12,349
Total Cats: 563
Default

I'm sad, no one laughed at my witty link
curly is offline   Reply With Quote
Old 08-12-2018, 01:49 AM   #14  
Senior Member
 
Join Date: Mar 2014
Location: Jacksonville, FL
Posts: 727
Total Cats: 64
Default

thats wild that it twisted the splines like that.

get a matching twisted driveshaft from the seller. problem solved. lol
borka is offline   Reply With Quote
Old 08-12-2018, 01:54 AM   #15  
Junior Member
Thread Starter
 
Join Date: Feb 2017
Location: Apple Valley, California
Posts: 124
Total Cats: -17
Default

Quote:
Originally Posted by curly View Post
I'm sad, no one laughed at my witty link
Tbh, I did irl, I just didn't post anything about it. I really wish I had the money, tbh.

Quote:
Originally Posted by borka View Post
thats wild that it twisted the splines like that.

get a matching twisted driveshaft from the seller. problem solved. lol
Hahaha yea someone else suggested that as well!
Balto is offline   Reply With Quote
Old 08-17-2018, 03:17 PM   #16  
Junior Member
 
Join Date: Nov 2016
Location: Richmond, VA
Posts: 121
Total Cats: 28
Default

I'm impressed someone managed to twist those splines before breaking the gears honestly.
themonkeyman is offline   Reply With Quote
Old 08-17-2018, 03:23 PM   #17  
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Chicago. (The non-murder part.)
Posts: 27,304
Total Cats: 2,185
Default

Yeah, I kinda feel like a special prize for Mechanical Anger is warranted here. I have NEVER seen the input shaft twist like that.

Joe Perez is offline   Reply With Quote
Old 08-17-2018, 07:57 PM   #18  
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 9,458
Total Cats: 1,137
Default

Your PPF is most definitely cracked, by the way.
concealer404 is online now   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
FL: NA NB 3.9 torsen, 4.3 torsen, axles, driveshaft, 6 speed transmission. Low miles. borka Miata parts for sale/trade 5 04-23-2018 10:12 AM
Nail in the tire but not all the way through? triple88a General Miata Chat 2 11-20-2014 12:24 AM
SWFL Local: 6sp, 3.90 torsen swap, 99 head, koyo rad pdexta Miata parts for sale/trade 5 05-30-2014 02:01 PM
wtb: 6sp trans dvcn WTB 1 06-27-2010 11:43 AM
Trade: my MSM 6sp, for your low-mileage NB 5sp + labor :) evank Miata parts for sale/trade 17 05-20-2009 02:16 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 04:14 PM.




We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.