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Re: 727 bolt size? Thread in trans
[Re: elmor353]
#3067677
08/13/22 04:19 PM
08/13/22 04:19 PM
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Joined: Sep 2003
Posts: 18,528
north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 18,528
north of coder
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the holes that are circled are for the guide pins. the other [larger] threaded holes are 7/16-14 [course as has been mentioned] and the smaller holes are 1/4-20 thread. the top threaded hole above the starter gets a stud that is 7/16-20 [fine] thread the starter hangs on. there is approximately 1 1/2" of stud hanging out of the bellhousing. [calibrated eyeball measurement  ] i just double checked this on a 727 on the shelf. 
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Re: 727 bolt size? Thread in trans
[Re: moparx]
#3067711
08/13/22 06:23 PM
08/13/22 06:23 PM
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Joined: May 2005
Posts: 4,506
Florida
BDW
OP
master
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OP
master
Joined: May 2005
Posts: 4,506
Florida
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Well, I may have circled the wrong holes.
What I'm sure of, is the 4 top holes are not threaded.
The 2 holes I need bolts for are threaded, they insert from engine side and thread into trans, and are larger than top 4 bolts.
Trans is mated to engine, I know this because I fought it for 2 hours getting those guide pins aligned.
Dust cover is installed, just these last 2 spots are missing bolts.
Found this pic, not mine, but this is starter side
Last edited by BDW; 08/13/22 06:34 PM.
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Re: 727 bolt size? Thread in trans
[Re: BDW]
#3067856
08/14/22 02:19 PM
08/14/22 02:19 PM
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Joined: Sep 2003
Posts: 18,528
north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 18,528
north of coder
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the top four unthreaded holes are for the 3/8-16 thread bolts that thread into the engine block. these, you know. the two threaded holes you need bolts for are 7/16-14 thread. however, i am not sure of the length of these. "possibly" around 1 1/4" or 1 1/2" long. i'm just guessing on the length of these bolts. i believe the starter bolt threads are 5/8-11 thread. hope this helps out.
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Re: 727 bolt size? Thread in trans
[Re: moparx]
#3068089
08/15/22 09:34 AM
08/15/22 09:34 AM
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Joined: Jan 2003
Posts: 74,490
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,490
U.S.S.A.
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the top four unthreaded holes are for the 3/8-16 thread bolts that thread into the engine block. these, you know. the two threaded holes you need bolts for are 7/16-14 thread. however, i am not sure of the length of these. "possibly" around 1 1/4" or 1 1/2" long. I'm just guessing on the length of these bolts. i believe the starter bolt threads are 5/8-11 thread. hope this helps out. Starter bolts are also 7/16 , otherwise what you posted is correct.
running up my post count some more .
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Re: 727 bolt size? Thread in trans
[Re: moparx]
#3068182
08/15/22 02:03 PM
08/15/22 02:03 PM
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Joined: Jan 2003
Posts: 74,490
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,490
U.S.S.A.
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John, i stand corrected ! i knew the starter bolts are 7/16 thread. i don't know why i stated they were 5/8". my mind was obviously wandering around in the "cobwebs" and got distracted ! i will gladly take any punishment deemed necessary for my bad behavior.............    5/8 to get it out ...
running up my post count some more .
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