upgrading t56
09-30-2008, 08:32 AM
#1
Staging Lane
Thread Starter
Join Date: Oct 2006
Location: Peoria, Il
Posts: 57
Likes: 0
Received 0 Likes
on
0 Posts
upgrading t56 I just recently broke my t56 transmission. When I pulled my trans out I found that I twisted the input shaft in half. I am only putting 420 HP to the wheels. I have previously tore the trans apart and put in a steel 3-4 shift fork and Carbon Fiber blocker rings in. While it is apart I am planning on puting bronze fork pads and billet keys in it. Do I need to do the viper input shaft and mainshaft conversion since I have alrady broke the input shaft once or was it just worn out from having 120K on it? And are there any other upgrades that u guys would recommend?
09-30-2008, 06:25 PM
#7
So is the LS1 T56's input/main shafts made of a different material than the Viper's?
As far as I knew, the only thing a Viper trans had going for it was the different gearing
As far as I knew, the only thing a Viper trans had going for it was the different gearing
Trending Topics
10-01-2008, 09:38 AM
#8
TECH Fanatic
iTrader: (6)
Join Date: Oct 2002
Location: Charlotte metro area
Posts: 1,959
Likes: 0
Received 3 Likes
on
3 Posts
Breaking a 26T input is not common at torque levels well above yours. What condition was the pilot bearing? Are you using a std bell? Are the dowells there? Something "helped" break this and you should look for it/ solve it before you throw anothe trans at it.
Later Vipers ( 04-on)have a sigle piece cluster gear and they do have different input material (9310 over 4615) besides gear cuttings.
Later Vipers ( 04-on)have a sigle piece cluster gear and they do have different input material (9310 over 4615) besides gear cuttings.
10-01-2008, 11:47 AM
#9
Staging Lane
Thread Starter
Join Date: Oct 2006
Location: Peoria, Il
Posts: 57
Likes: 0
Received 0 Likes
on
0 Posts
I am using a stock bellhousing and the line up dowels are still there yes. And yea i just got off the phone with Amber from six speeds inc and she said to do away with the roller pilot bearing and use a bronze pilot bearing. And yes I agree with you I still need to do investigate everything before I fix everything and later run into the same problem.
10-01-2008, 02:46 PM
#11
...and does the rest of the transmission still turn freely, by turning the output shaft, or what's left of the input?
Seems more likely that something locked-up inside the trans and seized the input.
Has the trans been opened up again after this latest carnage?
Seems more likely that something locked-up inside the trans and seized the input.
Has the trans been opened up again after this latest carnage?
10-01-2008, 03:40 PM
#12
Staging Lane
Thread Starter
Join Date: Oct 2006
Location: Peoria, Il
Posts: 57
Likes: 0
Received 0 Likes
on
0 Posts
the trans still goes through 1-6 and reverse perfectly fine. And no I havnt opened the trans up yet but will be soon. Here are a few pics of the input shaft on the trans side. I havnt pulled the bellhousing, and clutch out yet.
10-01-2008, 04:02 PM
#13
The pics aren't very well focused on the input shaft damage, but it doesn't look like a twisting tear, but a shearing break.
Who did the recent rebuild of the trans? Something doesn't seem right, either with the pilot support or the end-play of the input shaft to cause it to have a shearing force on the input shaft??
Who did the recent rebuild of the trans? Something doesn't seem right, either with the pilot support or the end-play of the input shaft to cause it to have a shearing force on the input shaft??
