drive shaft problem in a t-5 conversion

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May 11, 2009 | 05:15 AM

#11

2+2GT

6th Gear Member

Joined: May 2009

Posts: 5,232

From: PA

Quote:

Originally Posted by troberts289

I have a 66 Mustang that used to have a c-4 transmission in it. I'm currently in the middle of installing a t-5 out of a 93 Mustang. I bought a slip yoke for a t-5, but I realized today that it uses a u-joint with an outside snap ring, but the driveshaft I have from the automatic car needs an inside snap ring. The worst part is if I replace the driveshaft I'll end up with the same problem at the rear. The old automatic slip yoke fits on the transmission, it would just have to be shortened by about an inch. Would this cause a problem? I'd love to talk to someone who's done this before. Thanks.

The C4 slip yoke and driveshaft should fit, I have done this conversion. The shaft is tight, but remember the axle moves rearward when you put weight on the wheels. If for some reason you just can't get it, send back the yoke you don't need, and have your driveshaft shortened 0.5". I have never needed to do this, however.

May 11, 2009 | 11:24 AM

#12

pass1over

1st Gear Member

Joined: May 2009

Posts: 123

From: Florida

+1 I did the c4 to t5 swap and my stock driveshaft and yokes fit. It was a little tight, but was go0d enough until I could save up for a new shaft.

Stop guessing how much free play and such you should have. With weight on the rear wheels, measure the length from the back of the trans tailshaft to either the center of the u-joint cup on the pinion yoke or the back of the u-joint cup on the pinion yoke. Give that measurement to a driveline shop and let them do the adjustments for you, thats what they get paid to do.

May 11, 2009 | 11:28 AM

#13

2+2GT

6th Gear Member

Joined: May 2009

Posts: 5,232

From: PA

Quote:

Originally Posted by Gun Jam

Oh and one more thing before I forget... If your t5 is not brand new or has more than 0.01 miles on it (in someone else car) after a rebuild, pull the tail shaft case off and replace the bushing inside and the oil seal before you install it in the car if its not too late. IF only take one bit of advice at least make it this as parts are nearly free...3 bucks worth i think.

-Gun

With the right tools it is perfectly possible to replace the bushing without removing the housing, even with the trans in the car. All you have to do is slide the slip yoke out, and swap out the old bushing and seal for new.