manual trans problem..help needed

[65notch]

hey guys, i did the t5(brand new) conversion on my 65 notchback about 6 months ago and ever since then, i couldnt go over about 80mph without the entire car shaking and rattling, im only at 2500rpms at the mph also so i know it has to do with speed and not engine rpms. driveshaft is new, tires are balanced, rear end is fine. well today i went on a cruise in the mountians, ran my car hard shifting from 3-4-3 quite often but never really ran the rpms or mph up high. then a few hours later i was driving on the freeway at about 75 mph and i went to pass a car so i got on it, and as usual the car started to shake, rattle, etc when the mph went up, and then about halfway around the car, at maybe 80-85 mph, something odd happened and the vibration went away and she was driving as smooth as could be! there was no loud noise, clunk, or anything. so i let off the gas, and then got back into her and went to probably around 90-95(2900rpms) and she was still smooth... i continued to drive another 20 miles and then when iw as home i saw a little bit of smoke floating around so i look under the car and their is fluid dripping on the floor under the trans. i pulled my consol out so i could see be the shifter and it looks like fluid is comming out from around that the shifter bolts down to the trans case.

does anybody have any suggestions of what happened, what i should do or anything?

thanks

 

[351w_swap]

if the tranny has a warranty send it back.

 

[65notch]

they only come with like a 90day or something

 

[65notch]

anybody else?

what would cause oil to come out the shifter cap?

 

[Hack]

could be a problem with the breather.

Start by checking the fluid level in the trans and then check the breather.

 

[LW_horse]

The vibrations might be caused by "poor" driveline angles.

I "killed" the bushing supporting the transmisson output yoke on my TKO after 1600 miles due to not adjusting transmission and rear axle u-joint angles (and having a poorly balanced pinion yoke in rear).

I suffered from increasing vibrations as the bushing got worse and worse.

I reduced vibrations with 85-95% by swapping to a Strange billet yoke in rear, and careful adjustment of u-joint angles...

Can the vibrations have "un-tightened" the bolts holding the shifter, or even cracked the output shaft housing?

 

[Hack]

I think the vibration and the fluid out of the shifter are two separate things.

I've had a similar vibration in an '85 Mustang GT and it was a ujoint. The problem would come and go. As the ujoint got worse the vibration would occur more and more often. LW_horse could be right, but I would start with the new driveshaft. Just make sure the ujoints are ok and it is properly balanced.

 

[Eyeless_Seven]

Check the transmission mount. A badly made one will cause all kind of problems.

 

[stangman16]

how do you check the u-joint angles?

The vibrations might be caused by "poor" driveline angles.

I "killed" the bushing supporting the transmisson output yoke on my TKO after 1600 miles due to not adjusting transmission and rear axle u-joint angles (and having a poorly balanced pinion yoke in rear).

I suffered from increasing vibrations as the bushing got worse and worse.

I reduced vibrations with 85-95% by swapping to a Strange billet yoke in rear, and careful adjustment of u-joint angles...

Can the vibrations have "un-tightened" the bolts holding the shifter, or even cracked the output shaft housing?