A833 input shaft length

by **Adrian Worman** » 22 Feb 2012 22:27

is there any variation in input shaft length? The 23spline late B/E body box I'm just about to install has an input shaft of approx 7 3/4" long but thats too short to go inside the pilot bush :shock:

I checked the A body box that was in there and the input shaft on that measures approx 8 1/2" long.

I can fairly easily swap in the input shaft out of the existing box I think, just amazed it wouldn't slide straight in

............. and no bloody jokes about how easy it is to have an automatic :evil:

by **christer** » 23 Feb 2012 5:42

What about the depth of your bell housing?

It is supposed to be 7,38" according to a book of mine.

by **dave-r** » 23 Feb 2012 9:01

You sure some dick didn't cut it short at some point? I have seen that before when someone has tried to fit a manual box to an engine that came with an auto transmission. Not realising they need to fit a pilot bushing to the back of the crank.

by **Adrian Worman** » 23 Feb 2012 9:25

dave-r wrote:You sure some dick didn't cut it short at some point? I have seen that before when someone has tried to fit a manual box to an engine that came with an auto transmission. Not realising they need to fit a pilot bushing to the back of the crank.

Yeah I read up on some topics on the web last night after I posted this, some cut back to fit Shivvys etc, some butchered for various stupid reasons :roll:

I read of a Dakota pilot bushings that fills it but I think I'm just best to swap over the input shaft from my existing box, the first gear is set on the shaft so I may have a different ratio than stock but I'm sure they fit any box regardless of the ratio, I'll check with the tech at Brewers

I'll measure the bellhousing Christer but I have both boxes side by side and the difference in the nose of the shaft is obvious :!:

by **Adrian Worman** » 23 Feb 2012 21:55

I think this is the answer.............. fit a roller type pilot bearing that fills the large recess on the crank flange but goes farther back fromthe tip of the input shaft by about an inch :idea:

Panic over :mrgreen:

by **transman** » 29 Feb 2012 19:55

I wouldn't put my last buck on it, but does Chyrsler have a different crank for an automatic than it does for a standard transmission? :?:

I know that Chebbies have (at least during my time working for a GM dealer). 1 crank for an automatic ordered vehicle and one for a standard transmission vehicle.
Just a thought. One must be careful as the input shaft must be supported at the front of it.

transman :s002:

by **dave-r** » 29 Feb 2012 21:59

No Chrysler just cast a hole in the end of all their cranks. Then machined it out for the bushing on the manual trans cars. You can buy a bushing that fits into the un-machined crank hole.

by **transman** » 04 Mar 2012 17:22

In the August 2011 issue of Mopar Muscle, they were building up a big block engine. Instead of using a TF727 they were going to install an 833 4 speed. The crank had been for an automatic, and of course the problem with the crank being drilled for the converter up needed to be addressed. What they used was a National bearing, part number FC69907.1.

transman :s002:

by **Adrian Worman** » 04 Mar 2012 23:03

Yep, and here it is installed, piece of cake, the same bearings used on the Magnum 318 and 360 engines, thanks for the part no., i might put some into stock :wink:

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