1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Used transmission, what to check for?

Thread Tools
 
Search this Thread
 
Old 03-22-05, 03:48 AM
  #1  
Rotary Enthusiast

Thread Starter
 
H4Inf's Avatar
 
Join Date: Aug 2004
Location: The World
Posts: 1,100
Likes: 0
Received 0 Likes on 0 Posts
Question Used transmission, what to check for?

I'll be buying a used transmission very soon, just wondering what I should look for, and after I buy it are there any bits I should look at in detail or replace regardless ?

Just don't want to have to pull the damn thing out again after swapping it in.

Thanks!!
Old 03-22-05, 05:20 AM
  #2  
Savanna Rx-7

 
kenn_chan's Avatar
 
Join Date: Jun 2004
Location: yokosuka japan
Posts: 1,577
Received 12 Likes on 7 Posts
Talking Hmmmm chunks !

Originally Posted by H4Inf
I'll be buying a used transmission very soon, just wondering what I should look for, and after I buy it are there any bits I should look at in detail or replace regardless ?

Just don't want to have to pull the damn thing out again after swapping it in.

Thanks!!
Well hopefully you will make sure that its for an RX-7!

sorry couldn't resist that.

bought the only thing you can do if its not in a running car is drain the oil at the yard, and look for shavings, or chunks, shavings would be a good indicator of some trashed out synchro's, and chunks, well lets just say that chunks are only cool in peanut butter.

also check to see if it was leaking past the front or rear seals, and either way replace both before putting it in your ride.

kenn
Old 03-22-05, 08:36 AM
  #3  
Rotary Enthusiast

Thread Starter
 
H4Inf's Avatar
 
Join Date: Aug 2004
Location: The World
Posts: 1,100
Likes: 0
Received 0 Likes on 0 Posts
Thumbs up

Originally Posted by kenn_chan
Well hopefully you will make sure that its for an RX-7!

sorry couldn't resist that.

bought the only thing you can do if its not in a running car is drain the oil at the yard, and look for shavings, or chunks, shavings would be a good indicator of some trashed out synchro's, and chunks, well lets just say that chunks are only cool in peanut butter.

also check to see if it was leaking past the front or rear seals, and either way replace both before putting it in your ride.

kenn
Hmm that thought never crossed my mind... arent all transmissions the same?

apparently these have been rebuilt, but i dont think tested... Is there a way to test bearings, or should i just regrease the sealed ones and hope for the best...

I got a tooth out of my current box and now sounds like countershaft bearings are gone :P I will definietly replace both seals as my box has been leaking on the cat for the past 8 months.

Cheers kenn,

Paul.
Old 03-22-05, 09:34 AM
  #4  
RX for fun

iTrader: (13)
 
Siraniko's Avatar
 
Join Date: Aug 2001
Location: Socal
Posts: 15,926
Likes: 0
Received 22 Likes on 19 Posts
its really hard to tell until you install it and take it for a cruise. The above posts are true but not always.
Old 03-22-05, 11:31 AM
  #5  
Banned. I got OWNED!!!
 
680RWHP12A's Avatar
 
Join Date: Aug 2002
Location: chatsworth,Ca.
Posts: 4,666
Likes: 0
Received 1 Like on 1 Post
remove the oil drain plug and check the magnet, if there is alot of metal present, stay away from that tranny!!
also the color of the gear oil call tell you alot too, if its got gold metallic, its the syncro material, get away from that tranny!!!
Old 03-22-05, 11:58 AM
  #6  
Too old to act my age

 
Rogue_Wulff's Avatar
 
Join Date: Feb 2005
Location: Tulsa, Ok.
Posts: 3,164
Likes: 0
Received 0 Likes on 0 Posts
While the tranny is out, at least check the condition of the clutch. If in doubt, change it. Replacing the clutch requires pulling the tranny, and since it is already out, thats the best time to check and replace if needed.
one more thing to check on the used tranny that should seem obvious, but has not been mentioned, is to see if the shifter works correctly and does not have excess free play. A worn shifter can indicate how hard the tranny has been treated. Also, turn the input shaft in each gear, to feel how smoothly the shaft spins.
Old 03-22-05, 08:08 PM
  #7  
Rotary Enthusiast

Thread Starter
 
H4Inf's Avatar
 
Join Date: Aug 2004
Location: The World
Posts: 1,100
Likes: 0
Received 0 Likes on 0 Posts
will do all of the above, cheers...

regarding the clutch! yes i will definitely be replacing whatever I need to there... its been waiting for an overhaul for about... 8 months... as long as ive had the car :P

Which bits of the clutch do I need to look at?
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
rotor_veux
2nd Generation Specific (1986-1992)
5
09-03-15 07:10 PM



Quick Reply: Used transmission, what to check for?



All times are GMT -5. The time now is 01:46 AM.