t-5 finally blew!!
Thread Starter
Joined: Dec 1999
Posts: 3,544
Likes: 19
From: WI,USA
Car: 89 FORMULA 350, 91 Z28 Convertible
Engine: ls1, LB9
Transmission: t56, Auto
Axle/Gears: S60/ 3.73
t-5 finally blew!!
get this I have been running this t-5 for quite some time now years. and have chewed up rear end after rear end but sat I put in a 9bolt 3.45 and decided to take it for a quick ride. I made sure everything was well worked in all the diff fluid had time to go from axle to axle. I gave it a little as I was comming up a hill the as I slid it into third it made a sound like when someone misses a shift so I pulled back on the shifter right away and then let off the clutch and all I could hear was a clunking. tried 3rd again as I was costing down the hill and nothing, so I tried all the other gears with no problem but, still the clunking noise, so I limp it home (around the corner) pull it apart and third gear and the counter shaft are destroyed. the counter shaft has no teeth at all for 3rd and third geat is missing a whole bunch of teeth.
what gets me is why now? oh well I guess but, does any one know who sells a counter shaft for a 88 t-5 that does not cost 300+ I can find the 3rd gear every where even beefy ones for the trans (30teeth) but the only counter shafts I find are nuts wtf for a little more you could have a used t56
what gets me is why now? oh well I guess but, does any one know who sells a counter shaft for a 88 t-5 that does not cost 300+ I can find the 3rd gear every where even beefy ones for the trans (30teeth) but the only counter shafts I find are nuts wtf for a little more you could have a used t56
Joined: Jul 2000
Posts: 6,521
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From: Aridzona
Car: `86 SS / `87 SS
Engine: L69 w/ TPI on top / 305 4bbl
Transmission: `95 T56 \ `88 200-4R
Re: t-5 finally blew!!
Originally posted by 88 350 tpi formula
what gets me is why now?
what gets me is why now?

oh well I guess but, does any one know who sells a counter shaft for a 88 t-5 that does not cost 300+ I can find the 3rd gear every where even beefy ones for the trans (30teeth) but the only counter shafts I find are nuts wtf for a little more you could have a used t56
i have a t-5 also i heard that 3rd was the weak gear in them. I was thinkin about maybe just rebuilding it instead of goin with a 6-speed. Does ne1 know if you can actually get the t-5 rebuilt to withold some hp.
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From: New Palestine, IN (Just East of Indy)
Car: '85 Z28
Engine: 305
Transmission: WC T5, 3.23 posi
I blew mine a couple weeks ago. The whole 3-4 assembly was in pieces. Not to mention I lost the input shaft bearing thus wiping out the mainshaft and probably the input shaft, couple syncros looked like they went through a garbage disposer, and it broke a shift fork! I pulled it and there were a bunch of metal in the bottom and the fluid had a silver color to it from all the shavings.
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From: New Palestine, IN (Just East of Indy)
Car: '85 Z28
Engine: 305
Transmission: WC T5, 3.23 posi
Originally posted by Spdfrk1990
Does ne1 know if you can actually get the t-5 rebuilt to withold some hp.
Does ne1 know if you can actually get the t-5 rebuilt to withold some hp.
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From: New Palestine, IN (Just East of Indy)
Car: '85 Z28
Engine: 305
Transmission: WC T5, 3.23 posi
Yes, but T56's are only rated to 450 tq. You can get a WC T5, but they're only good for like 300 tq. or so. I'm not saying it's exspensive, it is, but if you're running a lot of power you're tranny's going to be exspensive if you want it to hold. I don't have the money now, so the kit isn't an option. We'll see how the WC T5 holds up to 500hp and 550tq. As long as I don't abuse it (i.e. powershift, clutch dump) I'll be alright.
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From: New Palestine, IN (Just East of Indy)
Car: '85 Z28
Engine: 305
Transmission: WC T5, 3.23 posi
Are you talking about the ad for a G-force tranny or a stock WC T5. The stock ones are far, far from bullet proof... cap gun proof, maybe, but not bullet proof...
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Joined: Jul 2001
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From: New Palestine, IN (Just East of Indy)
Car: '85 Z28
Engine: 305
Transmission: WC T5, 3.23 posi
Kind of... Internally I believe they are basically the same, but I do know the cases are different. They won't work in Chevy's.
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Joined: Jul 2001
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From: New Palestine, IN (Just East of Indy)
Car: '85 Z28
Engine: 305
Transmission: WC T5, 3.23 posi
Well the internals are basically the same, but not identical. For some reason the beefed up T5's are more popular for Fords than for Chevy's, why that is so I don't really know. I would think it would be about the same. If they did make them for a reasonable price though, I think there would be a good market, but since all the kits are ridiculously priced they're not in high demand.
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Joined: Jan 2001
Posts: 769
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From: DC_MD_VA Area
Car: 1991 Camaro RS
Engine: L03 305 V-8 (for now ;) )
Transmission: T-5 5 speed
Axle/Gears: stock... whatever that means :)
https://www.thirdgen.org/techbb2/sho...hreadid=175170
If youre gonna build it yourself, the drop in kit from G-Force is only $950 for everything.
If youre gonna build it yourself, the drop in kit from G-Force is only $950 for everything.
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From: New Palestine, IN (Just East of Indy)
Car: '85 Z28
Engine: 305
Transmission: WC T5, 3.23 posi
The $950 is for the gears 1-4 ONLY. That does not include a mainshaft or 5th (overdrive) gears. The kit for the entire tranny is about $1600. I've got the price sheet around here somewhere, and I've also posted the prices on another thread in the transmission forum.
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Joined: Jan 2001
Posts: 769
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From: DC_MD_VA Area
Car: 1991 Camaro RS
Engine: L03 305 V-8 (for now ;) )
Transmission: T-5 5 speed
Axle/Gears: stock... whatever that means :)
Has anyone in here actually broken a mainshaft? Anyone here powershift into 5th and break the O.D. gears? Does anyone here shift into 5th when they drag race? I keep hearing about countershafts breaking. Hell, my RS had a broken countershaft when I got it (input shaft gear and the mating gear trashed). Even G-Force said that unless youre doing some REALLY EXTREME STUFF, you dont need the mainshaft. I would consider the steel shift forks though.
$1600?
Not necessary...
$1600?
Not necessary... Member
Joined: Jan 2003
Posts: 404
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From: Hartland MI
Car: 89 Formula
Engine: 355
Transmission: 700r4
Axle/Gears: 3.73
Originally posted by kfoley
Kind of... Internally I believe they are basically the same, but I do know the cases are different. They won't work in Chevy's.
Kind of... Internally I believe they are basically the same, but I do know the cases are different. They won't work in Chevy's.
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Joined: Oct 2002
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From: Sharonville OH
Car: 98 Z28 vert
Engine: LS1
Transmission: automagic
Axle/Gears: 2.73 - boo racing yay MPG
I believe the problem is the shifter location on the mustang t-5. It is way forward in relation to a fbody t5.
Joined: Nov 2002
Posts: 3,466
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From: MA, USA
Car: 83 bird
Engine: 305/383
Transmission: WC T5
Axle/Gears: 3:42
I blew my WC T5 yesterday... first it was hard to shif out of gear.. then the whining got louder... then it started to knock... then I got the shifter into the neutral position... and it was still in gear... then WHAM back wheels locked up!
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From: GO PACK GO
Car: 83Z28 HO
Engine: Magnacharged Dart Little M 408
Transmission: G Force 5 speed
Axle/Gears: Moser 9" w/Detroit Trutrac
Originally posted by Spdfrk1990
well thats stupid cause u could get a t-56 for that. I would get a world class heavy duty t-5 b4 i spent that on that kit.
well thats stupid cause u could get a t-56 for that. I would get a world class heavy duty t-5 b4 i spent that on that kit.
Joined: Nov 2002
Posts: 3,466
Likes: 5
From: MA, USA
Car: 83 bird
Engine: 305/383
Transmission: WC T5
Axle/Gears: 3:42
88 350 tpi formula sounds bad, are you going to open it up and see what let loose?
Thread Starter
Joined: Dec 1999
Posts: 3,544
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From: WI,USA
Car: 89 FORMULA 350, 91 Z28 Convertible
Engine: ls1, LB9
Transmission: t56, Auto
Axle/Gears: S60/ 3.73
Originally posted by aaron7
I dunno... I don't think it's something that I'm up for! Can I do it with a Chiltons?
I dunno... I don't think it's something that I'm up for! Can I do it with a Chiltons?
if you just want to see whats going on inside ,there are plenty of us who have taken them apart. and if you want same the other way too.
I think I had left a link to a sight that shows the t-5 break down and assembley instructions on another post
Thread Starter
Joined: Dec 1999
Posts: 3,544
Likes: 19
From: WI,USA
Car: 89 FORMULA 350, 91 Z28 Convertible
Engine: ls1, LB9
Transmission: t56, Auto
Axle/Gears: S60/ 3.73
http://www.ttcautomotive.com/English/products/T-5.asp
I know it says tremec but, it should still be the same or atleast close enough since tremec bought it or bought out borgwarner? can't remember it's not like it matters anyway
I know it says tremec but, it should still be the same or atleast close enough since tremec bought it or bought out borgwarner? can't remember it's not like it matters anyway
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Joined: Jul 2001
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From: New Palestine, IN (Just East of Indy)
Car: '85 Z28
Engine: 305
Transmission: WC T5, 3.23 posi
Chances are whatever blew will be more exspensive than a new (used) T5, but it would be good experience to crack it open and take a look at it. There's not a whole lot to them really.
Joined: Jul 2000
Posts: 6,521
Likes: 91
From: Aridzona
Car: `86 SS / `87 SS
Engine: L69 w/ TPI on top / 305 4bbl
Transmission: `95 T56 \ `88 200-4R
every one wanted way too much for a used t-5 so I said forget it. got the t-56 for even less than the t-5 counter shaft alone!
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From: Evansville,IN,USA
Car: 89' T/A, 00' Firehawk
Engine: 406 Roller
Transmission: TH700R4 w/2800 stall
Axle/Gears: 3.23 Posi
Re: t-5 finally blew!!
Originally posted by 88 350 tpi formula
what gets me is why now?
what gets me is why now?
I don't know how GM T5's compare to Ford's T5's they put in mustangs but I have tried to help my friend put his frod T5 back together twice, that thing is a cluster #$%#. I am a mechanic, but have zero knowledge of the inner workings of a manual gear box. We had a half *** diagrahm, it didn't help, he ended up taking it to a local rearend shop and had them put it back together. He blew reverse out of it, and some countershaft or something. I don't remember.
Good luck.
Jason
Thread Starter
Joined: Dec 1999
Posts: 3,544
Likes: 19
From: WI,USA
Car: 89 FORMULA 350, 91 Z28 Convertible
Engine: ls1, LB9
Transmission: t56, Auto
Axle/Gears: S60/ 3.73
I posted this a very long timeago. I know the rear did not make it break.
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