Any Ideas on Trans Problem

I read this forum often, it has provided me with a wealth of information
in my long love/hate journey restoring my cobra ii. just wanted to say
thanks and suck up before I get to my problem.

I have been in the process of converting an automatic to manual.
I have a stock engine and went with a 4 cylinder t-5 setup. I bought
cheap from this websites classifieds section and it appered to be in good
shape. It was from 89 turbo and included bell. I put this behind my v-8.
Had a local shop rebalance flywheel and press me a smaller pilot bearing.
Also, shortened my driveshaft. Just to clarify- it came with a bell for a v-8
setup. I re-used my auto starter. Everything fit fine, just tight.

I recently got engine back together and solved some electrical issues.
In neutral, engine purrrrrrrrrrs. revs high, no imbalance kinds of shaking.
I put the rear end up on blocks to test tranny. 1st gear ok, starting in
2nd as I increase RPM's, horrible tranny shaking thunking sounds. same with
3rd and 4th.

Now that I have a load on engine, is this an imbalance problem with flywheel.
Maybe the shop got it wrong? Could this be a pilot bearing issue? Or did I buy
a cheap tranny with a bent input shaft? Any ideas would be appreciated. I plan on pulling everything aprt anyway, just wondered if I was missing something.

thanks
andy

d,
I didn't think it was flywheel either. But as soon as you mention
shaking everyone I talk to jumps on the 28oz balance for early v8's
I know it isn't the driveshaft. Hooked up a newer balanced one to make
sure. Discovered that a late model 96+ is the right length for this conversion.
Needs different u-joints though.

Thanks for the suggestions gentlemen.
I put the tranny in a year ago and just now have
been able to get back to the car. It's a '76 and 30
years is fast approaching.

I used the original c4 crossmember double hump for
the trans. The steel on that thing was thick, compared
to a fox body. I cut off one bolt-hole side and spaced it
back, similar to an article on mustang.net. As far as the
driveshaft goes, don't know the angle? just assumed the
t-5 would sit behind engine at same angle as the Rad would.
I guess since you shorten the original driveshaft by about an
inch, you will increase the angle some.

My concern is what Dano mentioned about pilot not sitting
correctly. I thought the input shaft length was correct but
diameter was different. I need to check on that. I will also
take down road. I was rushed at time of install, moving the
family.

I want this done right now that I have my garage back. I have
been thinking about getting a V8 t5 or the RAD setup. I plan on
painting over winter, so getting engine bay done at same time would
be nice.

I'll post pics soon. I know I always like seeing a II that survived

andy