T56 Inputshaft Question

[Flyn High Again]

I see the Cobras aren't the only ones with drivetrain problems. Not too bad a breakage record for 1500 runs. That's a lot of track time.

Remind me not to race you if I ever get out that way. Although my car will run quicker than 12.3...

[P Machy]

I see the Cobras aren't the only ones with drivetrain problems. Not too bad a breakage record for 1500 runs. That's a lot of track time.

Remind me not to race you if I ever get out that way. Although my car will run quicker than 12.3...

Whats up Cliff!

Nah, she wont be fast like before. 1st gear will be too tall for me and the torque multiplication with 4.56 VS stock trans and gears is just like 2% taller.

Will have to spray I bet...and if she blows, Twin Turbos and gut the entire car out and maker her a real track whore!

[5.0Stanger]

Not sure if you all have built a trans before, but here goes.

Most manual transmissions have a small amount of bearing preload, between the input shaft bearing and output shaft bearing. After a small amount of use, the bearings begin to wear in. This ends up creating a little forward/back and side-to-side play in the input and output shafts. You are able to get a more noticeable amount of play from the input shaft, because it is sticking out of the bearing retainer more than the output shaft is sticking out of the tailhousing. I'd say that anymore than .015" of forward/backward play in the shafts is ok for a well-worn trans. Racing for years like this, I'd be concerned, as the trans should be checked over once in a while.

That's my 2 cents.

[P Machy]

Not sure if you all have built a trans before, but here goes.

Most manual transmissions have a small amount of bearing preload, between the input shaft bearing and output shaft bearing. After a small amount of use, the bearings begin to wear in. This ends up creating a little forward/back and side-to-side play in the input and output shafts. You are able to get a more noticeable amount of play from the input shaft, because it is sticking out of the bearing retainer more than the output shaft is sticking out of the tailhousing. I'd say that anymore than .015" of forward/backward play in the shafts is ok for a well-worn trans. Racing for years like this, I'd be concerned, as the trans should be checked over once in a while.

That's my 2 cents.

Best two cents id ever seen!

And thanks. The play wasnt too bad and the trans is already in...no issues with it at all, minus the usual cold trans grind that I get.

Known to snap input shafts, so will have to schedule a period of when I need to send the trans in for service by a shop. It has been beat up by a Termee with a Whipple though....He ran all sorts of tires and some of his shifts where a bit slow, so some of his shifts barked really bad.

Just need it to hold up till september and hopefully 400 runs.

[5.0Stanger]

Glad I could be of help. The synchros are probably bit tired, if that guy's shifts were a bit slow. Not everyone can hit the shift/clutch timing just right.

[P Machy]

Glad I could be of help. The synchros are probably bit tired, if that guy's shifts were a bit slow. Not everyone can hit the shift/clutch timing just right.

helped alot

believe they are a bit tired...but not bad...i know how bad synchros feel like

BTW: what would you recommend for service intervals for the trans?

My Terminator had 22k miles on it when I bought it, but the owner may never had rowed through the gears much. It now has 36k miles with just over 450 runs down the strip.

Like to maintain it, so that i could avoid another tow from the strip.

[5.0Stanger]

Considering you have that many runs on it, you may want to have the bearings and synchros replaced. The mileage thing doesn't always play into the service intervals, when someone races with it. I had around 500 passes on the trans in my last Stang and it only needed bearings.