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Manual Tranny problem........

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Brokeblazer79

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I just bought a 1979 k5 Blazer. The previous owner had put in a new clutch prior to my buying it. Well little did I know he went cheap and the part where the input shaft goes in shattered. Well i spent yesterday changing the clutch pressure plate throwout bearing the whole nine yards..... Now here is my problem I can't get the transmission to line up for nothing....... any tips ???? I and not sure exactly what kind of transmission it is But i do know it has a 12 inch clutch in it. Any help would be greatly appreciated.......
 
Make sure there is no damage to the pilot bushing. Is the trans in gear? If so, try turning the output shaft to get the splines to align.
 
Also check to make sure it is going in straight. You can look at where the bellhousing butts up to the block. If the gap on one side is bigger than the other side, she's in crooked and the input shaft wont line up in the clutch plate. One thing that helps for leverage to get that last half inch seated is to get the bolts hand tight on one side of the bellhousing, then the other, and keep working back and forth until the bolts are torqued down.:D
 
is it a 3 speed or a 4 speed? does it have a granny gear? my guess is an sm465. take longer bolts than from the factory and slide them into the transmission housing holes where it would bolt up to the bell housing and use them as guides to get the transmission to line up against the bell housing.
 
Do not use the bell bolts to try and pull it into place. Great way to bust stuff.

You're fighting the coarse splines in the clutch disc, and you'll have to rotate the tranny's innards to get the splines lined up...all while pushing inwards a bit and wiggling a bit.

I always install the bell without the tranny and use the extra long alignment bolts to keep the tranny itself roughly aligned as I try to coax it through the clutch disc. It's taken me as little as 10 minutes and as much as two to three hours of cussin' to get it done.

Rene
 
I didnt mean to use the bolts as a way to pull the tranny in from start to finish, only to help seat the last half inch (the hardest part I've had all three times I've had to pull the tranny out).
 
You should be able to push the whole works home without using bolts. It's possible for the pilot on the input shaft to not be aligned close enough and foul the pilot bushing. Both the bushing and the pilot part of the input have pretty generous chamfers...but it's better safe than sorry. Replacing the pilot bushing isn't any fun.

I guess as long as you don't have to torque the hell out of the bolts to pull it tight then you know things are OK...

Rene
 
This is just one of those sucky jobs where you need to find a buddy and just get it done... As tRusty said, sometimes its done in 10 minutes, sometimes it takes a couple hours.

I've had it go both ways when I do the installs. I once spent about an hour with a buddy getting it in, another time I spent nearly two hours trying to get it together outside of the truck on the shop floor. Of course, dad happened to walk by, grabbed the transmission and popped it straight on like nothing! Doah!

Then again, I had a buddy who spent a week trying to get it on, so I hopped in my truck, drove two and a half ours, then had it popped in on the first try, lol
 
if you get it within an inch i found that turning the motor over it will come together damn near every time. It might put some strain or w/e on the bell housing bolts but i've done it 3 times with no problems
 
Then again, I had a buddy who spent a week trying to get it on, so I hopped in my truck, drove two and a half ours, then had it popped in on the first try, lol

Hey rusell i think i just found another sig:haha:
 
It is an SM 456 transmission to answer that question. Well we have worked for almost 12 hours straight trying to get the clutch and all that fun stuff back together...... Thanks for all the advice guys....:rolleyes:
 
Brokeblazer79 said:
It is an SM 456 transmission to answer that question. Well we have worked for almost 12 hours straight trying to get the clutch and all that fun stuff back together...... Thanks for all the advice guys....:rolleyes:
Click to expand...
Ok, that was pretty sarcastic, but sometimes these things don't go smoothly. If it is not going in, and you have tried everything we recommended, have you verified that there is no damage to the input shaft on the trans. Something as simple as a small burr can bind the trans enough to prevent getting it into place. Make sure they gave you the correct friction plate by verifying that the spline counts are the same. I have seen incorrect parts come in, even when new.

trustyk5's advice about mounting the bell housing first is very good advice when working with an SM465.
 
I had a bit of a fight with mine aswell. But the second time around it fell together. I was laid on my back with my two feet on the tranny and transfer case wiggling and pushing. The first time I had blocks on the floor pans and a pipe going from side to side to support the heavy SOB from a rope and this limited me I found out after fighting with it for awhile.
 
Good news......

:DThanks guys for all the advice. My blazers fixed and hopefully I will be out and about on the 28th with everyone....... Again thanks for all the advice. :D
 
he paid a shop to put it in :doah::haha:.



Had to throw you under the train buddy! See ya at work!
 
Never an issue, just curious, did the shop tell you that there were any issues, or was it just being a PITA?
 
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