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4l60E tail housing question

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Old 12-09-2010, 01:35 PM
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Default 4l60E tail housing question

I want to put a 4L60E from a 1999 Camaro into a 1987 Cadillac Brougham. For this I would like to modify the actual transmission x-member. But the way the tail housing is designed on the camaro transmission (it seems to be the three horizontal bolt type) makes the job much more complicated.
I would like to switch the tail housing to one that has the two vertical bolts, similar to my 200r4.

From what vehicles can I get that tailhousing? Is it from 2wd trucks?
What is involved? Only removing the six bolts and changing the gasket? Or is there anything else I should be aware, like swapping other parts? For now I don't care that I cannot use the speedometer on the Cadillac, I will eventually buy an electronic one.
Old 12-09-2010, 01:42 PM
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I'm not sure I understand your issue...the tailhousing still mounts to the crossmember by 2 bolts on the underside of the tailhousing. The bolts on the side are for the torque arm which you won't use.

You could get a tailhousing from a 2wd truck if for some reason the side bosses are in your way, but it mounts to the crossmember the same. You will remove the 6 bolts, use a new gasket, and I would hang onto your old VSS as well just in case.
Old 12-09-2010, 02:36 PM
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the gto tail housing is money! two bolts, on the bottom side.
Old 12-09-2010, 02:40 PM
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Originally Posted by shrike
But the way the tail housing is designed on the camaro transmission (it seems to be the three horizontal bolt type) makes the job much more complicated.
I would like to switch the tail housing to one that has the two vertical bolts, similar to my 200r4.
.
This is what you need $50, good used non f body six bolt tail housing from a transmission hardparts supplier.
http://cgi.ebay.com/ebaymotors/GM-4L...item27b6638378

FWIW I just sold an f body tail housing on ebay for $50, get this one, put yours up for sale and possibly break even.
Old 12-09-2010, 03:41 PM
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Thank you very much guys.
I am sorry but I had a brain fart. Only afterwards I realized the transmission still has the two bolts under it. I thought the embosses were the way it mounts, but they are for the torque arm if I am not mistaken.

Once again thank you and sorry for the brain fart!
Old 12-09-2010, 03:53 PM
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I would like to take advantage of this thread and ask about the engine and transmission angle.
From the S&P site I have the information that it should be 3 degrees down. I am not touching the rear end, maybe put stiffer springs and shocks as well as a sway bar.

I just wanted to see if someone can confirm that the 3 degree angle is correct in my application, street driven and shouldn't see more than 280-340 HP.
Old 12-09-2010, 06:31 PM
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3* down is good. both of my cars in my sig are 3.5* down and one has all stock engine/trans mounts.
Old 12-09-2010, 07:32 PM
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OK thanks for confirming it !
Old 12-10-2010, 11:21 AM
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Mine is also 3* down but I had to shim it to get there.

But it is also my understanding the trans angle and pinion angle should offset...after calculating working angle into the mix it seems I was stuck giving the pinion either 0-1* UP which is not ideal for traction.

Am I correct I should leave it set this way or would it be safe giving my pinion the proper -2* or -3* angle which should improve my launch?
Old 12-10-2010, 12:33 PM
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Originally Posted by thunderstruck507
Mine is also 3* down but I had to shim it to get there.

But it is also my understanding the trans angle and pinion angle should offset...after calculating working angle into the mix it seems I was stuck giving the pinion either 0-1* UP which is not ideal for traction.

Am I correct I should leave it set this way or would it be safe giving my pinion the proper -2* or -3* angle which should improve my launch?
This has been beat to death in the suspension forum. I've read there and googled it. What I've decided to go with was measuring the difference between the driveshaft angle and rear pinion angle.

Your pinion can be pointed up and you can still have a negative pinion angle.

http://www.iedls.com/asp/admin/getFi...&TID=28&FN=PDF
http://buickperformance.com/Pinion.htm
Old 12-10-2010, 02:19 PM
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Well that makes more sense. I used to bust tailhousings and destroyed my first built 4l60e. Checked and the tailhousing was -6* or -9*...something crazy so I used 1" thick nuts to shim the tailhousing up. Now it is -1* or -2* (I can't remember atm). The pinion is set almost neutral maybe easing close to +1*.




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