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Re: 727 Why you should always CHECK ! [Re: cudaman1969] #2406295
11/20/17 12:42 PM
11/20/17 12:42 PM
Joined: Sep 2003
Posts: 19,406
north of coder
moparx Offline
"Butt Crack Bob"
moparx  Offline
"Butt Crack Bob"

Joined: Sep 2003
Posts: 19,406
north of coder
Originally Posted By cudaman1969
Originally Posted By moparx
are the above statements saying neutral drops don't affect the sprag ? what fails internally when neutral drops are stupidly done ? or am i not understanding something in these statements ?
beer

Do a few, then try looking thru the broken parts to find out what broke first. It was a starting line practice back in the sixtys but the tires where tiny. NHRA banned it after too many clean ups. Then the billion dollar converter industry came about.

a few ? man, i remember this technique like it was yesterday ! then, there was the practice of us doing "J hooks", where one would go real fast in reverse, then drop into low. object was to see who could male the longest "J". biggrin funny we all have any feet left ! the local gas station made a fortune selling us used goodyear and firestone red line [and occasionally blue line/blue streak goodyears] G-70 tires for $5.00 ea [mounted and balanced - dating myself ? laugh2]. at least one pair of tires per weekend, not uncommon though, to go through one set per night ! we sure were "young & dumb" then. luck on our side helped a bunch too......
beer

Re: 727 Why you should always CHECK ! [Re: moparx] #2406433
11/20/17 05:26 PM
11/20/17 05:26 PM
Joined: Jan 2003
Posts: 16,376
D
dogdays Offline
I Live Here
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I Live Here
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Posts: 16,376
Unless my memory is totally shot, there is a problem with many of the posts above. There are several mentions of "beefing it up with a bolt in sprag". Trouble is, the bolt in sprag isn't any stronger than the original.

To beef up the transmission one needs a Super Sprag. It's physically stronger.

R.

Re: 727 Why you should always CHECK ! [Re: dogdays] #2406499
11/20/17 08:07 PM
11/20/17 08:07 PM
Joined: Jan 2003
Posts: 25,801
Rio Linda, CA
John_Kunkel Offline
Too Many Posts
John_Kunkel  Offline
Too Many Posts

Joined: Jan 2003
Posts: 25,801
Rio Linda, CA

And yet the Super Sprag fails too. Here's a pic of an A&A sprag that failed recently, notice all the pins are straight.

And the kicker, the trans was working "just fine" according to the owner but was pulled because of no Reverse; on disassembly the pan was found to be full of hard debris, further disassembly found the grenaded sprag which took out the roller rear support, rear band drum and the case. If it hadn't been for a broken factory rear servo piston the owner would have attempted another run.

Griner transbrake VB with no LBA and a factory front drum.

A&A Fail.JPG

The INTERNET, the MISinformation superhighway
Re: 727 Why you should always CHECK ! [Re: moparx] #2406524
11/20/17 09:49 PM
11/20/17 09:49 PM
Joined: Jan 2004
Posts: 8,269
fredericksburg,va
C
cudaman1969 Offline
master
cudaman1969  Offline
master
C

Joined: Jan 2004
Posts: 8,269
fredericksburg,va
O
Originally Posted By moparx
Originally Posted By cudaman1969
Originally Posted By moparx
are the above statements saying neutral drops don't affect the sprag ? what fails internally when neutral drops are stupidly done ? or am i not understanding something in these statements ?
beer

Do a few, then try looking thru the broken parts to find out what broke first. It was a starting line practice back in the sixtys but the tires where tiny. NHRA banned it after too many clean ups. Then the billion dollar converter industry came about.

a few ? man, i remember this technique like it was yesterday ! then, there was the practice of us doing "J hooks", where one would go real fast in reverse, then drop into low. object was to see who could male the longest "J". biggrin funny we all have any feet left ! the local gas station made a fortune selling us used goodyear and firestone red line [and occasionally blue line/blue streak goodyears] G-70 tires for $5.00 ea [mounted and balanced - dating myself ? laugh2]. at least one pair of tires per weekend, not uncommon though, to go through one set per night ! we sure were "young & dumb" then. luck on our side helped a bunch too......
beer

Can you imagine those tires on today's hot cars? We did a trick with the neutral safety switch, ground the switch, floor it, then start the engine. Probably didn't really do much but felt like a high stall converter or at least what we thought it would feel like. It is a wonder we lived to tell the tales. Racing and hanging out around the Hot Shops all Friday and Saturday nite, those where the days, er nights! $10-15 could last all weekend.

Re: 727 Why you should always CHECK ! [Re: nss guy] #2406536
11/20/17 10:05 PM
11/20/17 10:05 PM
Joined: Sep 2006
Posts: 1,443
central ohio
N
nss guy Offline OP
pro stock
nss guy  Offline OP
pro stock
N

Joined: Sep 2006
Posts: 1,443
central ohio
Update, also found the rear drum cracked, rear support trashed, hoping the output shaft is okay. still inspecting parts and making a list

20171119_195906_resized.jpg
Re: 727 Why you should always CHECK ! [Re: nss guy] #2406663
11/21/17 04:44 AM
11/21/17 04:44 AM
Joined: Jul 2010
Posts: 417
reynoldsburg,ohio
poppaj Offline
mopar
poppaj  Offline
mopar

Joined: Jul 2010
Posts: 417
reynoldsburg,ohio
We did it as well last race of the year. Snapped driveshaft as well.😬


AA/NSS 65'Coronet "Whompin Wedge"
Pop & Son Performance 557" B-1 power
John Holt Chassis
Re: 727 Why you should always CHECK ! [Re: nss guy] #2406667
11/21/17 06:14 AM
11/21/17 06:14 AM
Joined: Jan 2003
Posts: 5,762
Hot Rod Ridge
FastmOp Offline
master
FastmOp  Offline
master

Joined: Jan 2003
Posts: 5,762
Hot Rod Ridge
Just start off with a new core. No sense in putting most of those stock parts bank in service.
Use your hi-po parts and replace everything that ain't HI-Po

Re: 727 Why you should always CHECK ! [Re: nss guy] #2406688
11/21/17 09:14 AM
11/21/17 09:14 AM
Joined: Aug 2008
Posts: 4,070
Mo.
racerx Offline
master
racerx  Offline
master

Joined: Aug 2008
Posts: 4,070
Mo.
Originally Posted By nss guy
Update, also found the rear drum cracked, rear support trashed, hoping the output shaft is okay. still inspecting parts and making a list

^^^Good catch^^^most would of over looked that part and put it back together. up

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