GM Drivetrain & Suspension Chassis | Transmission| Driveshaft | Gears/Rear End/Differential | Traction Aids

Separating block from bellhousing help

Old Sep 4, 2011 | 11:37 PM
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Default Separating block from bellhousing help

Came home on the 3 day weekend to pull the trans to get ready for a built one. Started around 2 this afternoon. Damn exhaust flange bolts took FOREVER Snapped one of the studs on the y-pipe trying to get it off, rounded off a nut on the manifold flange so had to cut the exhaust on that side of the y-pipe. Damn electrical connections felt like they were super glued together.

Lets just say it took about 3 times as long to just get to where i was actually "pulling the transmission" than it took to get all the bellhousing bolts, crossmember stuff, and driveshaft out.

Anyways, I've got all the verter bolts out, all 8 bellhousing bolts, everything unplugged.... Can't the the block and tranny to separate Even had my dad get under there and muscle it around to no avail (he's a good 6'2 275 pounds)

Going to spray some PB blaster and let it soak over night but probably won't do much of a thing to help. Any suggestions?
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Old Sep 4, 2011 | 11:54 PM
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a pry bar and a bdh..if your doing it on the ground its gone be hard to get it to pry loose cuz you don't have much room.i put a trans in a 2000 z71 acouple months ago that was like that.more than likely the dial pins is sticking in the trans,the one i did they finally pulled out the motor,with the trans
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Old Sep 5, 2011 | 12:42 AM
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grab tailshaft and move it around, she'll break free.....might get some tranny fluid on u.
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Old Sep 5, 2011 | 01:24 AM
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I use a long *** pry bar and sit on the side of the truck and pry it out. Have some straps under the trans to catch it when it falls.
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Old Sep 5, 2011 | 03:33 AM
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Originally Posted by charcoal03silvy
Damn electrical connections felt like they were super glued together.

They are glued together. You need to use a heat gun, warm the glue, then unplug them. I also recommend heating it up to plug the switch connectors back in.
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Old Sep 5, 2011 | 05:08 AM
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You should be able to pull the tranny from the block without a problem. Don't forget a couple of the top bolts are a bolt with nut on them holding a bracket, and a nut over the bracket. You need to remove the nut, and the bolt. It has been overlooked before as it is hard to see up there. The easiest way to access them is with about 3+ feet of extensions, and the rear of the tranny hanging as low as you can get it. You can stand at the tailshaft, and get to them easily.
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Old Sep 5, 2011 | 06:29 AM
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Originally Posted by AKlowriderZ71
They are glued together. You need to use a heat gun, warm the glue, then unplug them. I also recommend heating it up to plug the switch connectors back in.
Or get in behind there w/. a combo or an angle wrench like Snapon makes, it'll come out that way too. Mine did, takes a lil patience. U need to finesse it, not be a bull. Note how that bad boy mounts, it'll have witness marks, if not, you'll be dickin round gettin detents right.

Originally Posted by Gadgetized
You should be able to pull the tranny from the block without a problem. Don't forget a couple of the top bolts are a bolt with nut on them holding a bracket, and a nut over the bracket. You need to remove the nut, and the bolt. It has been overlooked before as it is hard to see up there. The easiest way to access them is with about 3+ feet of extensions, and the rear of the tranny hanging as low as you can get it. You can stand at the tailshaft, and get to them easily.
Not if dowel pins are stuck.

Big ole 3' pry bar, but be careful prying on alum.

Then a lil wiggle side -side. 1 of the dowel pins may be stuck in hsg., but worry bout that when it's on ground instead of layin on yer back. Hoipefully u have a jack under tranny too.

As u live in NY, weren't yours rusty?

Last edited by fastnblu; Sep 5, 2011 at 06:35 AM.
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Old Sep 5, 2011 | 07:12 AM
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I raise the transmission as much as possible and grab the tailshaft and shake the bastard loose. Be careful and stay clear.
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Old Sep 5, 2011 | 07:25 AM
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Originally Posted by fastnblu
As u live in NY, weren't yours rusty?
I actually am real lucky, my Joe Gibbs has never seen a winter, and is very clean. My 99 on he other hand, barely has rocker panels on it anymore. I wouldn't want to try to pull that tranny apart!
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Old Sep 5, 2011 | 07:52 AM
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When I have stubborn dowels I usually put a couple bolts in about 3-4 threads and grab the tailhousing and shake the **** out of it. Up, down, side-side until it breaks free.... Soaking it in PB or something similar will help too. If they're real bad, use a small butane torch to heat the aluminum (as it expands much faster than the steel pins) and they should break free with a little persuasion. Just be careful with the aluminum.
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