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Oh Boy do I need help!
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Author:  Davey [ Fri Jul 13, 2007 12:41 pm ]
Post subject:  Oh Boy do I need help!
I've been trying to get the A904 tranny I picked up last weekend ready ti install, and I am having trouble. I removed the front seal without too much trouble, but almostnever got the front bushing out. I finally got it out, but I cannot get the new bushing in. Thinking that maybe it was supposed to be done with the front plate out, I removed the six bolts holding the front plate to the tranny case, but I can't get it off either. How do I get the new bushing in this thing? Davey
Author:  Doc [ Fri Jul 13, 2007 1:17 pm ]
Post subject: 
You really should have a Factory Service Manual (FSM) but here are some tips.

The front pump bushing is staked-in from behind. You will need to remove the front pump assembly (front plate) and dis-assemble the pump to swap-out the bushing.

The front pump removes with a special slide hammer, it uses a 7/16-14 (?) threaded stud that screw into two opposing threaded counter-bore holes in the empty bolt holes. Look closely into the "front plate" bolt holes and you will see the 2 double-threaded holes.

Once the pump is out, split and new bushing installed, the pump sections need to be carefully re-aligned before tighting all the bolts. There is a special sleeve the factory used but a large hose clamp or the empty trans case will also do the job.

There is a large o-ring and a paper gasket that seals the front pump to the case, you will need to replace those parts.

Note: Once that front pump is off, the clutch pack drums and 2nd gear "kick-down" band come right out. It would be a shame to not check the condition of the friction surfaces while the pump is off.
DD
Author:  slantvaliant [ Fri Jul 13, 2007 1:31 pm ]
Post subject: 
FSM's really help on this kind of thing, but here are some photos in an article on 904's:

904 Rebuild
Author:  Davey [ Fri Jul 13, 2007 2:56 pm ]
Post subject: 
Man! Fools rush in where they shouldn't. Had I known that a special tool was required to remove the pump so the bushing could be replaced, I would have left the bushing that was in it alone. I should have asked you all before I plunged ahead. Oh well, I'm committed now because I got the original bushing out and it's got to have one, so I'm going to have to keep going. I don't have this slide hammer...can one be improvised? Also, where can I get the book (shop manual) you spoke of? Davey
Author:  66aCUDA [ Fri Jul 13, 2007 6:33 pm ]
Post subject: 
Davey
Call Pat Blais aka t Fliite Patty 205 365 1966 or tflitepatty at verizon.net
He is the man.
Frank
Author:  Dusty Desks [ Fri Jul 13, 2007 8:37 pm ]
Post subject: 
It's easy to make a puller for the front pump using two pieces of threaded rod which you thread into the (provided) threaded holes in the pump, nuts, and a metal bar long enough to go across the width of the bellhousing. This, and an internal/external snap ring pliers are usually all the special tools you need to do any repair including complete teardown & overhaul, as long as you are VERY careful about such things as aligning the front pump halves when bolting together, etc., and have strong fingers and/or an assistant Most of the special tools in the FSM were designed for speed & consistency in a factory production-line environment. And use a torque wrench for everything the FSM has a torque specification for; for a few, a motorcycle spoke torque wrench or similar is necessary to be accurate enough at low torque settings.
Author:  Ron Parker [ Wed Jul 18, 2007 6:41 pm ]
Post subject: 
Junk 904 10 dollars A good transmission builder Priceless . Cost About 350 Dollars for rebuild Race it for seven years who is the man. :D











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