Another A833 issue

[forumpete]

Good morning Gentlemen,

I know this has been discussed in depth and I have searched/read countless threads, still I'm struggling.  I'm swapping from a 727 to A833 and I can't for the life of me get the damn thing in.  Unfortunately I don't have a lift so I'm doing this with the front of the car on jackstands.  The best I've been able to do is get the face of the trans ~1" from the bellhousing before I run into some kind of interference.  I am using the longer bolts for support method which does help but it just won't mate.  I stuck a piece of all thread into the bellhousing and compared it to the length of the length of the input shaft and they're almost exactly the same.  Kind of at my wits end with this and just about ready to throw in the towel and trailer it to a shop for them to do but I would really hate to.

Anybody got any other ideas for me?

Thanks!

[YellowThumper]

Did you put a pilot bushing in the rear of crank? Confirm crank is Drilled deep enough to accept the pilot shaft fully?

Mike

[FY1Cuda]

Do you have a pilot bushing inserted in the end of the crankshaft?  Some engines that had the 727 mounted to them didn't have the hole drilled in the crank, so if there is no hole, the tranny won't go all the way home.  If you do have the hole and pilot bushing, if there is a ding on the bushing, it's enough to hang up the input shaft.

[forumpete]

I installed the pilot bushing/bearing and measured the distance from the bushing into the crank before I installed the clutch.  There's a decent chance of course that I measured something wrong.

[YellowThumper]

Check to make sure that the pilot hasn't collapsed from your install. As in if crank hole was too small bushing can still go in but will compress to also be too small.

Also, check to see if the Drilled deeper hole in crank is not smaller in diameter than the bushing ID.
Could be Drilled deep enough but not large enough.

Do you have access to pin gauges and or bore gauges? If not you can have someone lathe turn up a blank that matches your input shaft. Would be fairly cheap and is a whole lot lighter than the trans.
Places like McMaster Carr sells hardened pin blanks that could also be had.

Good luck.

[forumpete]

Its beginning to appear that I'm going to be pulling my bellhousing off.....

[fantum]

I  the same problem several years ago and found the diameter required to fit the transmission input shaft into the crank wasn't the correct diameter and depth.  I (much younger, fearless, working on a shoestring ....) actually drilled out the crank until the internal diameter of the hole in the back of the crank was deep enough to accept the bushing and input shaft (I believe it was a 15/16" drill bit).

Later, I heard there was a bushing that was designed to fit these situations.  Maybe you can contact Passon or some other reputable Mopar transmission shop for a solution.

[YellowThumper]

I  the same problem several years ago and found the diameter required to fit the transmission input shaft into the crank wasn't the correct diameter and depth.  I (much younger, fearless, working on a shoestring ....) actually drilled out the crank until the internal diameter of the hole in the back of the crank was deep enough to accept the bushing and input shaft (I believe it was a 15/16" drill bit).

Later, I heard there was a bushing that was designed to fit these situations.  Maybe you can contact Passon or some other reputable Mopar transmission shop for a solution.

I have also heard of such a bushing but does not adderss the lack of depth for the hole.
If bearing hole and seat are proper then hand drilling the back clearance could be an option. Note it only has to be larger than the input shaft. Not as big as the OD for the bearing.
Some of the "fixes" i have heard of was to cut off the end of the tail shaft that protrudes pass the bearing.

Not an option I would consider personally.
Drop pan, drop crank and have machined properly if necessary.

[forumpete]

I know this means nothing without measurements but below is a pic I took of the pilot bushing on the input shaft.  This is pushed on as far as it would go, I was taking measurements before my install.

[YellowThumper]

I would suspect the Drilled minor hole might be deep enough but probably smaller than trans shaft. Buy a cheap drill the same diameter as the shaft and by hand insert it into bushing to see if it feels like it goes in enough past your bushing.

Have you tried to assemble trans with out the clutch disc and throw out bearing? That would difinitively rule out those items.

Another thought...
Did you align your clutch disc to crank prior to tightening down the pressure plate?

[roadman5312]

I would suspect the Drilled minor hole might be deep enough but probably smaller than trans shaft. Buy a cheap drill the same diameter as the shaft and by hand insert it into bushing to see if it feels like it goes in enough past your bushing.

Have you tried to assemble trans with out the clutch disc and throw out bearing? That would difinitively rule out those items.

Another thought...
Did you align your clutch disc to crank prior to tightening down the pressure plate?

                             What I was thinking . 

[sassygreen]

did you use the alignment tool to install clutch? It aligns the clutch with the throw out bearing.

[forumpete]

I would suspect the Drilled minor hole might be deep enough but probably smaller than trans shaft. Buy a cheap drill the same diameter as the shaft and by hand insert it into bushing to see if it feels like it goes in enough past your bushing.

Have you tried to assemble trans with out the clutch disc and throw out bearing? That would difinitively rule out those items.

Another thought...
Did you align your clutch disc to crank prior to tightening down the pressure plate?

I like the drill bit idea, I'm going to give that a try.  Yes I did align the clutch disk prior to tightening the pressure plate.

[Chryco Psycho]

SO you are 1" away  I have had them bind as the brg retainer slides in the last 1/4" or so but not that far away .
 The pilot would seem to be the obvious choice assumong the splines are sliding into the clutch disc , did you try the disc on the spling before installing the clutch ? It could be the wrong spline

[forumpete]

SO you are 1" away  I have had them bind as the brg retainer slides in the last 1/4" or so but not that far away .
 The pilot would seem to be the obvious choice assumong the splines are sliding into the clutch disc , did you try the disc on the spling before installing the clutch ? It could be the wrong spline

I didn't test fit the tranny into the clutch prior to dropping the motor into the car 

I did use an alignment tool on the clutch though and it matches the spline count on the input shaft so I think I'm good there.  Its got to be the input shaft length hitting the crank/pilot bearing.