NVRL8TE Posted July 26, 2013 Report Share Posted July 26, 2013 So, after a recent T56 swap, and a 4.56 gear swap with an 03 Cobra aluminum driveshaft, around 70 (2900) in 6th I get a crazy vibration. Bad. And between 2200-2800, it's there, too. But not as crazy, and it kind of pulsates, per say. Push the clutch in, it disappears...I'm thinking I might index the driveshaft in a different position. Maybe that's a start?Help. Lol Link to comment Share on other sites More sharing options...
F8L GT Posted July 26, 2013 Report Share Posted July 26, 2013 If you push in the clutch and its gone, its not drive shaft. Sent from my MILESTONE3 using Tapatalk 2 Link to comment Share on other sites More sharing options...
NVRL8TE Posted July 26, 2013 Author Report Share Posted July 26, 2013 Oooo. You're right. It's late. I'll talk to you guys in the morning. Link to comment Share on other sites More sharing options...
Det_Riot Posted July 26, 2013 Report Share Posted July 26, 2013 Looks like its time to tear the motor down and go big, 5.0 stroker, cams, forged everything, the works Link to comment Share on other sites More sharing options...
NVRL8TE Posted July 26, 2013 Author Report Share Posted July 26, 2013 When I do the motor? It'll be an N/A 4V 5.4. I just wanna know what the vibration is until I can afford the motor swap. Link to comment Share on other sites More sharing options...
Blackmage Posted July 26, 2013 Report Share Posted July 26, 2013 pilot bearing/bushing or something transmission related. Link to comment Share on other sites More sharing options...
Schiffy Posted July 26, 2013 Report Share Posted July 26, 2013 Flywheel not proper weighted?Tapatalk made me do it! Link to comment Share on other sites More sharing options...
Rolocut Posted July 26, 2013 Report Share Posted July 26, 2013 Try u joint Link to comment Share on other sites More sharing options...
NVRL8TE Posted July 26, 2013 Author Report Share Posted July 26, 2013 U joints are good. I never noticed this vibration until recently. And I kinda did all the changes at once. I will note, that above 70 and its happening, it goes away when I let off the throttle. Link to comment Share on other sites More sharing options...
Rolocut Posted July 26, 2013 Report Share Posted July 26, 2013 Honestly it sounds like a u joint Link to comment Share on other sites More sharing options...
Pushrod91 Posted July 26, 2013 Report Share Posted July 26, 2013 (edited) Recheck the pinion...Double check the u-joints. I don't think its that honestly cause it would shake when you let off aswell. Used DS or new? Could be outta balance. Sent from my DROID RAZR using Tapatalk 2 Edited July 26, 2013 by Pushrod91 Link to comment Share on other sites More sharing options...
Det_Riot Posted July 26, 2013 Report Share Posted July 26, 2013 Pinion angle get messed up when you put the t56 in since its longer than the t45? Link to comment Share on other sites More sharing options...
NVRL8TE Posted July 26, 2013 Author Report Share Posted July 26, 2013 03 Cobra aluminum driveshaft. I set the pinion angle correctly. Link to comment Share on other sites More sharing options...
GearGambler Posted July 26, 2013 Report Share Posted July 26, 2013 I agree, its not the driveshaft or the rear if you step on the clutch and it goes away at 70mph.did you do anything to the clutch or flywheel when you did the trans swap? the problem exists between the flywheel and the driveshaft i'm thinking. Link to comment Share on other sites More sharing options...
1997cobra Posted July 26, 2013 Report Share Posted July 26, 2013 a u joint that is coasting doesnt have the same load as when it is driving the tires. dont rule that out yet Link to comment Share on other sites More sharing options...
Rolocut Posted July 26, 2013 Report Share Posted July 26, 2013 a u joint that is coasting doesnt have the same load as when it is driving the tires. dont rule that out yetI agree ^^^^^ Link to comment Share on other sites More sharing options...
1997cobra Posted July 26, 2013 Report Share Posted July 26, 2013 Bad ujoint = who knows when it will vibrateOut of balance drive shaft = vibration all the timeSent from my SCH-I545 using Tapatalk 4 Beta Link to comment Share on other sites More sharing options...
NVRL8TE Posted July 27, 2013 Author Report Share Posted July 27, 2013 It goes away when I let off, I should also note. Link to comment Share on other sites More sharing options...
1997cobra Posted July 27, 2013 Report Share Posted July 27, 2013 let off as in coast, or let off as in engine braking? Link to comment Share on other sites More sharing options...
NVRL8TE Posted July 27, 2013 Author Report Share Posted July 27, 2013 In gear, letting off the gas, completely. Link to comment Share on other sites More sharing options...
1997cobra Posted July 27, 2013 Report Share Posted July 27, 2013 does it do it in all gears? Link to comment Share on other sites More sharing options...
Pushrod91 Posted July 27, 2013 Report Share Posted July 27, 2013 So have you tried anything yet?Sent from my DROID RAZR using Tapatalk 2 Link to comment Share on other sites More sharing options...
1997cobra Posted July 27, 2013 Report Share Posted July 27, 2013 Could this be gears? once it gets off the drive side it stops? Link to comment Share on other sites More sharing options...
SniveTroll Posted July 27, 2013 Report Share Posted July 27, 2013 makes me want a hella beefy t-56. i like the tko but i want 6 speeds. Link to comment Share on other sites More sharing options...
NVRL8TE Posted July 27, 2013 Author Report Share Posted July 27, 2013 6 speeds are awesome! Link to comment Share on other sites More sharing options...
revhead347 Posted July 29, 2013 Report Share Posted July 29, 2013 I had some thing similiar to that happen. A couple of the bolts on the driveshaft to pinion flange had backed off. 2 minute fix.I ran into the same question this last time I broke my transmission. All the transmission builders I talked to said to stick with the 3550 series transmission and pass on the T-56.Kurt Link to comment Share on other sites More sharing options...
1997cobra Posted July 29, 2013 Report Share Posted July 29, 2013 3550 is sbf only right? I feel like the t56 fits the mod motor perfectly. did he give you a reason? i seriously would like to know. are the 3550s the bulletproof transmissions of the sbf realm? Link to comment Share on other sites More sharing options...
Rolocut Posted July 29, 2013 Report Share Posted July 29, 2013 3550 is sbf only right? I feel like the t56 fits the mod motor perfectly. did he give you a reason? i seriously would like to know. are the 3550s the bulletproof transmissions of the sbf realm?3550/tko hold a ton of power, they are just notchy and need to have shift mods done by some good company out there (liberty/hanlon/d&d). Most guys stay tko and don't go t56 because essentially a stock t56 is weaker then a tko but will shift better out of the box. A viper spec t56 or magnum 6060 will essentially be the bulletproof trannys across the board for everyone, but the added cost, weight and double over drive usually shy people away from going that crazy. Link to comment Share on other sites More sharing options...
revhead347 Posted July 29, 2013 Report Share Posted July 29, 2013 It has to do with what you're doing with it. The 3550 can be put in a GM or a Ford, it only came in one car, and that was the Cobra R. The 3550 series, and T-56 are actually built to the same technical spec, so they are virtually identical in strength. The TR6060/Magnum T56 are built to a stronger technical spec, but they have engagement problems that make them impractical. If have a reasonable sized camshaft having a sixth gear wouldn't be practical because the engines don't like to run at low rpm and high load as it would at crusing speeds anyway. The sixth gear isn't worth the extra weight of the T-56 for me. However, the big determining factor for my car is the price points on most of the hard parts. Every part in a T56 costs 3 times as much as it does for a 3550. Since my car makes over 700 ftlbs of torque, the reality is that it's just going to keep breaking things, and I'm just going to have to keep fixing it. For example, I just saw a 26 spline input shaft for a 3550 on ebay new for $67. The best price I can find a 26 spline input shaft for a T56 is $338.Kurt Link to comment Share on other sites More sharing options...
Pushrod91 Posted July 29, 2013 Report Share Posted July 29, 2013 (edited) You guys have some good info. But lets keep this thread on topic. Start a new thread on trans differences if you like. Be good to look up if need be.Sent from my DROID RAZR using Tapatalk 2 Edited July 29, 2013 by Pushrod91 Link to comment Share on other sites More sharing options...
copmagnet Posted July 29, 2013 Report Share Posted July 29, 2013 I would like a thread for transmissions and how to build a solid one! Looking to build mine here soon. Link to comment Share on other sites More sharing options...
GearGambler Posted July 29, 2013 Report Share Posted July 29, 2013 I had some thing similiar to that happen. A couple of the bolts on the driveshaft to pinion flange had backed off. 2 minute fix.KurtGood Suggestion! Link to comment Share on other sites More sharing options...
revhead347 Posted July 29, 2013 Report Share Posted July 29, 2013 I would like a thread for transmissions and how to build a solid one! Looking to build mine here soon.You're free to hijack my thread on the 3550.Kurt Link to comment Share on other sites More sharing options...
NVRL8TE Posted July 30, 2013 Author Report Share Posted July 30, 2013 I will work on this and report back tomorrow. Link to comment Share on other sites More sharing options...
GearGambler Posted July 30, 2013 Report Share Posted July 30, 2013 Do it! Link to comment Share on other sites More sharing options...
NVRL8TE Posted July 30, 2013 Author Report Share Posted July 30, 2013 Driveshaft and u joints appear fine. How many inches should the yoke be sticking out of the tailshaft? Link to comment Share on other sites More sharing options...
Det_Riot Posted July 30, 2013 Report Share Posted July 30, 2013 Driveshaft and u joints appear fine. How many inches should the yoke be sticking out of the tailshaft?Its not a set measurement. Bottom out the yoke of the driveshaft, then pull it out an 1-1/2 inches. Its more about engagement length than excess out Link to comment Share on other sites More sharing options...
NVRL8TE Posted July 30, 2013 Author Report Share Posted July 30, 2013 I know, but now that I looked under there, it's like 3-4 maybe? LOL I was worried about this when I did the swap. Link to comment Share on other sites More sharing options...
Det_Riot Posted July 30, 2013 Report Share Posted July 30, 2013 Lol well idk how long your yoke is you gotta unbolt it from your rear end pinion, bottom it out, then pull it out 1-1 1/2 inches and that's where it should be Link to comment Share on other sites More sharing options...
NVRL8TE Posted July 30, 2013 Author Report Share Posted July 30, 2013 I'll do that tomorrow. Bolting on my OEM 10th anniversaries tonight. And it's LOL more complex then it seems. Gotta go get my fox an hour away, bring it home and swap. I'm skeptical on how anthracite will look against Mystic. Link to comment Share on other sites More sharing options...
