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

How durable are the GSL-SE transmissions?

Thread Tools
 
Search this Thread
 
Old 10-05-09, 03:27 PM
  #1  
Senior Member

Thread Starter
 
Whisper's Avatar
 
Join Date: Sep 2008
Location: Seattle, WA
Posts: 622
Likes: 0
Received 0 Likes on 0 Posts
How durable are the GSL-SE transmissions?

I haven't really noticed any problems with it other than getting it into reverse is a bit rubbish, which I think is common, but the car has 190k miles on it and I don't think the tranny has ever been rebuilt. I'm doing a motor swap and all that business, so the decision I'm faced with - do I pull the tranny as well and rebuild it, or do I just leave it alone? I don't know how bulletproof these transmissions are and how long they last. I'd rather not deal with it if I don't have to, already spent more money than I was hoping to and got my hands full as it is. Should I ignore the transmission and maybe just replace seals and fluid and then wait until it actually fails before blowing money on a rebuild?
Old 10-05-09, 03:55 PM
  #2  
Super Moderator

iTrader: (3)
 
gsl-se addict's Avatar
 
Join Date: Jan 2003
Location: Lynchburg, VA
Posts: 5,088
Likes: 0
Received 11 Likes on 11 Posts
I would wait. Probably go ahead and replace the front/rear seal and the front gasket to keep it from leaking. When it dies, you can replace/rebuild then. They normally hold up fine. It seems that they tend to develop bearing noises as they wear. Used ones are pretty cheap too. It might be worth just picking up a used spare (and maybe rebuild it down the road). Then if your tranny does fail, you'll have a backup.

Mine was replaced at 123k due to the previous owner driving it with no oil in there (was leaking and thought it was engine oil, not gear oil). When I got the car, there was no 3rd gear due to the teeth being sheared off from no lubrication. All the gears and shafts were blue due to the heat.
Old 10-05-09, 04:01 PM
  #3  
Moderator

iTrader: (3)
 
diabolical1's Avatar
 
Join Date: Feb 2002
Location: FL
Posts: 10,822
Received 307 Likes on 268 Posts
i would say wait and just get it done, but i don't know your situation (another car, finances, etc.). i've had one crap out on me while driving and it wasn't a pleasant experience. however, until you rebuild it, if you have to drive it, then i guess you just have to drive it.
Old 10-05-09, 04:06 PM
  #4  
Moderator

iTrader: (3)
 
j9fd3s's Avatar
 
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,844
Received 2,606 Likes on 1,849 Posts
i'd wait too. unless you go drag racing, they wear really slowly...
Old 10-05-09, 05:40 PM
  #5  
Senior Member

Thread Starter
 
Whisper's Avatar
 
Join Date: Sep 2008
Location: Seattle, WA
Posts: 622
Likes: 0
Received 0 Likes on 0 Posts
Alright, sounds reasonable.
Old 10-05-09, 06:28 PM
  #6  
common sense prevails....

iTrader: (7)
 
80's old school's Avatar
 
Join Date: Jul 2008
Location: Chino and Lake Arrowhead Calif
Posts: 1,669
Likes: 0
Received 9 Likes on 9 Posts
Used ones are so easy to find... I have 3 spares and I was not even looking for them!!
Old 10-05-09, 11:57 PM
  #7  
Rotary Freak

iTrader: (3)
 
mustanghammer's Avatar
 
Join Date: Nov 2006
Location: Parkville, Mo
Posts: 1,525
Received 230 Likes on 147 Posts
Same here. Decent used gear boxes are all over the place - I never fix them, just stick in another one that has good syncros. Also, you can use a 12A box behind the 13B. The 12A box has better ratios too.
Old 10-06-09, 12:10 AM
  #8  
Lives on the Forum

iTrader: (5)
 
84stock's Avatar
 
Join Date: Apr 2003
Location: calgary
Posts: 5,537
Likes: 0
Received 9 Likes on 5 Posts
Look for a low mileage S5 n/a box and swap tailshafts. Much better 5th gear for the highway.
Old 10-06-09, 12:15 AM
  #9  
Senior Member

 
84rtaryrcket's Avatar
 
Join Date: Dec 2007
Location: Upton,Ma
Posts: 268
Received 9 Likes on 9 Posts
just picked up my s5 tranny, swapped it out while im waiting on a set of housings for my 84 13b. hard to come by right now. so i got my extra tranny with only 100k on it
Old 10-06-09, 12:23 AM
  #10  
Lives on the Forum

iTrader: (5)
 
84stock's Avatar
 
Join Date: Apr 2003
Location: calgary
Posts: 5,537
Likes: 0
Received 9 Likes on 5 Posts
good pick, now you can drop in some 4.44 gears and the 5 th gear will be like stock




All times are GMT -5. The time now is 05:11 AM.