tranny to rear end alignment?

Hi all. I have just installed a 250 cu. in. Chevy with a T5 tranny in a 36 Chevy 2 door sedan. I am not sure what went wrong but the transmission is off center about 3/8" from the center of the frame. Actually this would mean it would need to be moved over 3/16". This may not seem a lot but I would like to know what would be the tollarance for drive shaft allignment. I could move it to the center but it would mean re-drilling the transmission mount. Let me know if 3/16" is too much. Thanks

 

I would guess you changed the rearend and thats straight.
I would try it and see if you have a problem.I put a 235 1962 truck motor in 52 Chevy car and its was off center.That still had the torque tube.

 

3 words- hole maker bigger! haha! I use a rasp on a die grinder to slot the holes a little when my tape measure lies to me. And I dont think that little of a misalignment will give you any grief.

 

just the tranny or whole engine? either way U-joints like to be exercised, I see no major issue. Some OEM off < 2".

 

Don't worry about it, my 8.8 rear in my '40 Chevy is offset almost 2" and it works just fine. Many OEM setups are offset from the factory.

 

The big thing is to try and have close tot he same angle on each end of the driveshaft. 3/16 inch over approx 5 ft is not going to matter. That is about 0.18 degrees, which is insignificant. Most U-joints like about 3-5 degrees of angle to ensure enough movement to keep them lubed and operating correctly. Assuming your angles are approx close to the same at each end, leave it be.

 

The front of the engine off 3/3" also ? No problem. The center line of the engine needs to be parallel with the centerline off the pinion shaft. Rears are sometimes offset yokes and that is OK. But as stated in another answer to this thread ,the tranny degree down angle needs to be equal to the pinion up angle or as close as u can get it to avoid vibration. Be sure to have the u joints in the driveshaftproperly aligned and "in phase" ,

 

OEM cars with offset engines (Older Mustangs, Corvettes) had the centre lines still parallel to actual car centreline. If the engine and transmission is not parallel to car centreline, you will definitely have some strange drive line harmonics that a universal joint won't fix.