t-5 rebuild
Thread Starter
Junior Member
Joined: Jul 2006
Posts: 91
Likes: 0
From: Sandtown Delaware
Car: 1987 pontiac Trans Am
Engine: 1988 305 TPI
Transmission: 700R4
Axle/Gears: 2:73 ... I think
t-5 rebuild
how hard and how long would it take me to put new syncronizers and bearings into a t-5
Joined: Sep 2005
Posts: 27,916
Likes: 2,448
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
how hard and how long would it take me
Ummmm.... uhh..... iunno...
It's pretty hard for somebody else to answer that. We don't know how much experience you have, what tools you have, what kind of environment you're working in, etc.
I've done more T-5 rebuilds than I care to admit to. When I still had one before I got so sick of them tearing up, I could drive mine into the garage (if it could still drive at all...), pull it, tear it down and throw away all the tore up stuff, put it back together with all new stuff, and re-install it and drive away, in about 8 hours. I'm guessing, since you're asking, that it'll probably take you longer.
Can't say about "hard"; that means different things to different people.
I have NEVER, not even ONCE, had to replace the "synchros" in a T-5; even in ones that had run dry, or chewed the teeth completely off of gears, or broke the case, or twisted the mainshaft in half. They just don't go bad.
What makes you think you need to "rebuild" your transmission? Is it 1st design, or 2nd design? What's it doing?
Last edited by sofakingdom; Jan 29, 2007 at 11:22 AM.
Junior Member
Joined: Jan 2007
Posts: 17
Likes: 0
From: Western Mass.
Car: '83 Berlinetta
Engine: 305
Transmission: WC t-5
Axle/Gears: 3.73 posi 10 bolt
Would I need a press to get the gears off the main shaft of my NWC t-5? I have the case opened up and the gear driven by the engine is chewed up, along with the gear that is driven by it. The brass syncro ring is also cracked I'm assuming because of the gear failure. I'm a tech by trade but this is my first attempt at transmissions.
Joined: Sep 2005
Posts: 27,916
Likes: 2,448
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Yes you need a press. For getting the 3-4 hub off the mainshaft so you can replace the 3rd blocker ring, and of course 3rd gear too if that's smoked. Also for getting the bushing off that 1st gear rides on, which in turn hold son the hub for the 1-2 synchro which holds 2nd gear on.
The usual reason that the clutch gear and countergear tear up, is because the front of the case is stretched. If the front countergear bearing has been leaking, you need to find yourself a different core to rebuild. Won't matter what you do to it, it'll just tear up again, quickly; not least because it won't hold fluid.
If that bearing hasn't been leaking, then the other thing that will trash one, is the pilot bushing being destroyed. Here again, you can build the transmission all you want, but unless you replace the pilot, it will promptly eat itself again.
It's probably not ecnomical to repair by buying hard parts to replce all that. You'll likely come out MUCH cheaper by locating an un-wasted core.
The usual reason that the clutch gear and countergear tear up, is because the front of the case is stretched. If the front countergear bearing has been leaking, you need to find yourself a different core to rebuild. Won't matter what you do to it, it'll just tear up again, quickly; not least because it won't hold fluid.
If that bearing hasn't been leaking, then the other thing that will trash one, is the pilot bushing being destroyed. Here again, you can build the transmission all you want, but unless you replace the pilot, it will promptly eat itself again.
It's probably not ecnomical to repair by buying hard parts to replce all that. You'll likely come out MUCH cheaper by locating an un-wasted core.
The two most essential tools you need to rebuild practically ANY manual transmission are a shop press and a good pair of snap ring pliers. Thick wheel bearing grease to hold individual bearing rollers in place is pretty much a "must-have" too. Junior Member
Joined: Jan 2007
Posts: 17
Likes: 0
From: Western Mass.
Car: '83 Berlinetta
Engine: 305
Transmission: WC t-5
Axle/Gears: 3.73 posi 10 bolt
Thanks for your input. I'm looking into some working t-5's right now. Hopefully they will last me a couple years until I'm ready to upgrade.
Member
Joined: Feb 2004
Posts: 126
Likes: 0
From: Yakima WA
Car: 1991 Firebird
Transmission: T5
Axle/Gears: 3.42 w/auburn racers diff
How much do u think somone would charge to rebuild a T5? ive been told its a better idea to just find another used one cuz its just as much if not cheaper.
Trending Topics
It's always a better idea to rebuild one than hoping that a used one will work ok and last a while. Unfortunately, if you don't think you can manage to rebuild it yourself, you're at the mercy of the tranny shops, and they usually charge pretty outrageous prices to rebuild one. If you can do one yourself, a good kit only sets you back about $150, and your time to do it. It's even worse with automatic transmissions. The prices for the parts are almost dirt cheap, but the labor a shop charges to go through them is insane.
Thread
Thread Starter
Forum
Replies
Last Post
3.8TransAM
NW Indiana and South Chicago Suburb
1
Sep 27, 2015 08:37 PM






