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Old 02-13-2009, 08:36 PM   #1
kenm78
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Transmission front pump removal 700R4

I am trying to remove my front pump on my 1986 700R4 tranny. It calls for a special GM tool. Anyone have any tricks to get it out??? HELP im at a standstill on this tear down.... LMAO
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Old 02-13-2009, 08:49 PM   #2
Jeffvega
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Re: Transmission front pump removal 700R4

look for two of the bolt holes to be threaded and you can screw in bolts and hook a chain to them and pull it out. If that don't work then post your question here http://www.hotrodders.com/forum/transmission-rearend/
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Old 02-13-2009, 09:03 PM   #3
Lugnut64052
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Re: Transmission front pump removal 700R4

I've never had a pump that was really stuck in the case, even after sitting for a long time.

Remove all the bolts, then with the pan off, stick a big screwdriver up the back side and lever on it a little. They've always popped right out for me.
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Old 02-13-2009, 09:09 PM   #4
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Re: Transmission front pump removal 700R4

I had a trans shop tell me that the lock-up solenoid in the trans has to come out or it will break off when the front pump is pulled.

Here is a picture of the puller but at a cost of $90 bucks I would try one of the above methods.


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Old 02-14-2009, 01:27 AM   #5
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Re: Transmission front pump removal 700R4

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Originally Posted by VetteVet View Post
I had a trans shop tell me that the lock-up solenoid in the trans has to come out or it will break off when the front pump is pulled.
That is true. Solenoid has to come out first. Been there, done that, broke that <raising hand>.
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Old 02-14-2009, 02:11 AM   #6
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Re: Transmission front pump removal 700R4

And the filter...
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Old 02-14-2009, 09:35 AM   #7
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Re: Transmission front pump removal 700R4

All good to go now!!! I wasn't sure I thought I would mess somthing up back there but sure enough it worked. Got the trans torn all the way down to that bottom plate with all the small springs behind it thats going to be a pain!!!! Thanks all for your imput.
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Old 02-15-2009, 12:21 AM   #8
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Re: Transmission front pump removal 700R4

You can make a tool to get the rear piston out. Get half a muffler clamp, the formed steel piece, (not the u bolt) drill a hole in the center and use a bolt or chunk of threaded rod and drill a hole in a piece of wood or steel.

Put the clamp in the tranny, curved part to the rear, run the bolt out the back thru the hole in the wood block and tighten the nut to squeeze the springs down.
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Old 02-15-2009, 12:22 PM   #9
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Re: Transmission front pump removal 700R4

Quote:
Originally Posted by Green Machine View Post
You can make a tool to get the rear piston out. Get half a muffler clamp, the formed steel piece, (not the u bolt) drill a hole in the center and use a bolt or chunk of threaded rod and drill a hole in a piece of wood or steel.

Put the clamp in the tranny, curved part to the rear, run the bolt out the back thru the hole in the wood block and tighten the nut to squeeze the springs down.
Outstanding idea. Now you got the chipmunks turning upstairs in my head my wife says she can smell the rubber burning now. LOL Thanks for that good idea.
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Old 10-04-2010, 08:21 AM   #10
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Re: Transmission front pump removal 700R4

Here's the tool that my stepdad built after we looked thru many books, forums, tool sites, & more. The one already posted in this thread will only work on the older 700R4's (87 & Back) from what we can tell. This was based on the 2 or 3 early 90 models that we have which do not have the groove/slot behind the splines and finding a factory tool using the same principal as this one designed for the 4L60E's.










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