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EA71 4spd trans teardown - help

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I am in the process of rebuilding my trans and I cannot seem to get the 4WD pinion shaft gear off of the trans.  There is a gear with a lock/castle not on the shaft and I cannot get it to budge.  Can any of you please tell me how to get this off?

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An impact wrench will back that nut right off.  You might replace it with a new one (dealer item, I had to get one about 6 months ago, so they're still available) as the nut gets torn up when you peen it on installation.  Everything should come apart once that nut is off.  I had good luck reassembling with high torque permatex sealant (the gray stuff) with no gaskets.  

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Thank you for the reply.  So far the impact has not made it budge?

 

I still have not been able to get it off.

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I suspect you need a bigger impact. or more PSI?  My $30 Campell Hausfeld wouldn't have moved it either, even tho it was 1/2 inch drive- utterly useless.  Harbor Freight has a pretty good one for under $100. It's a tool you will always need...

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Dremel tool with thin wheel cut down one side to relase it the get new nut

I hadn't thought of that!!!  If I can get the Dremel in there you might have the answer.  Already have the nut ready to be ordered. :D

 

I suspect you need a bigger impact. or more PSI?  My $30 Campell Hausfeld wouldn't have moved it either, even tho it was 1/2 inch drive- utterly useless.  Harbor Freight has a pretty good one for under $100. It's a tool you will always need...

You know I am not sure what this Craftsman puts out.  Maybe I should just bump her up to 120 PSI and have at it.  I only tried at 90 cause I don't want to snap a ring or pinion tooth.

 

Thank you guys!

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The nut will break loose waaay before any damage is done.  Besides, think what a transmission has to go through every day!

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Ironically I have not attempted to remove it again cause of free time.  I think my approach will be full psi on the impact and if that doesn't work I will Dremel the nut.  As it has been removed before you would think it easy to remove.  We shall see.

 

Thanks to everyone for the responses.

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Where, perchance, did you obtain the blown up schematic for the transmission? My fourth gear is gone and I have another transmission that I can make them one. Good luck, and keep posting, I'm quite interested.

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Where, perchance, did you obtain the blown up schematic for the transmission? My fourth gear is gone and I have another transmission that I can make them one. Good luck, and keep posting, I'm quite interested.

I was graciously given a copy of the parts catalog.  Been VERY helpful to say the least.

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