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Re: 727 front bushing
[Re: cermac]
#1240061
05/26/12 04:31 PM
05/26/12 04:31 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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With a dial indicator mounted to the crank and the indicator on the outer pump bore(no conv or pump in it) slowly turn the crank and see what you have... might need to get a set of offset alignment pins... also check the conv for run out on the input hub... conv mounted to the crank and indicator mounted to the block with the indicator on the hub... turn the crank and see if its out 
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Re: 727 front bushing
[Re: cermac]
#1240063
05/26/12 05:32 PM
05/26/12 05:32 PM
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Joined: Jan 2003
Posts: 25,791
Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,791
Rio Linda, CA
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Bronze bushing or babbit? Is the wear pattern all on one side or all around?
The INTERNET, the MISinformation superhighway
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Re: 727 front bushing
[Re: John_Kunkel]
#1240064
05/26/12 07:57 PM
05/26/12 07:57 PM
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Joined: Aug 2005
Posts: 760
Southington Ct.
turbobitt
super stock
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super stock
Joined: Aug 2005
Posts: 760
Southington Ct.
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I had a problem similar to this about 20 years ago. The problem ended up being that one of the alignment dowles was in the block a little to far. The chamfer on the pin combined with the chamfer on the bellhousing allowed the case to move around and not properly locate.
Allan G.
1970 Challenger w/572 Hemi street car and my pride and joy.
1986 T-Type with 272 Stage 2 Buick V6 engine - True 8 second street car. Just updated the engine and put down 928 HP @ 35# boost to the ground on chasis dyno.
1976 Cee Bee Avenger Jet Boat - 460 Ford powered.
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Re: 727 front bushing
[Re: John_Kunkel]
#1240065
05/26/12 07:59 PM
05/26/12 07:59 PM
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Joined: May 2010
Posts: 16
West Milton,Pa
cermac
OP
member
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OP
member
Joined: May 2010
Posts: 16
West Milton,Pa
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Quote:
Bronze bushing or babbit? Is the wear pattern all on one side or all around?
The wear pattern seems to be on opposite sides. For example at 12 o'clock and 6 o'clock. It's a clevite babbit.
Quote:
when the engine was align bored the crankshaft moved up in the block a small amount. as mentioned you need to check the crankshaft/transmission alignment
The engine was rebuilt 2 years ago. We ran all year last year w zero problems. It seems weird that we would have problems now by just changing the converter.
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Re: 727 front bushing
[Re: cermac]
#1240067
05/26/12 10:39 PM
05/26/12 10:39 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Dowel pins are 1/4" out from block. Should be more?
Yes about 1/2"... tap them out some
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Re: 727 front bushing
[Re: cermac]
#1240069
05/26/12 11:01 PM
05/26/12 11:01 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
How do I attach dial indicator to crankshaft. I have a magnetic mount for my gauge but not sure how to make that work.
Put the magnetic base on the back of the crank and
use a long arm to get the indicator out to the pump bore
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Re: 727 front bushing
[Re: MR_P_BODY]
#1240072
05/27/12 10:17 AM
05/27/12 10:17 AM
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Joined: Jan 2003
Posts: 16,925
NC
440Jim
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,925
NC
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Quote:
With a dial indicator ...
check the conv for run out on the input hub...
conv mounted to the crank and indicator mounted to the
block with the indicator on the hub... turn the crank
and see if its out
I like to see 0.003" TIR or less, 0.010" TIR is bad, inbetween is marginal.
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Re: 727 front bushing
[Re: cermac]
#1240074
06/16/12 09:27 AM
06/16/12 09:27 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
For info, found crack at hub in converter! Originally tested with 20# pressure and found nothing. One company rep said that should be enough. Finally took contractor chalk and powdered converter and crack showed immediately. Called company again and rep who sold it to me said pressure test I did probably wasn't enough. They found crack and now deciding what to do! Under warranty! Only 15 runs! Having removed trans SIX times and replacing front pump and seals and bushings hopeful to get fixed.Thanks to all who helped here for input!
The crack at the hub is SORTA common... it cracks
right next to the weld(heat affected zone).. I usually
check the converter with 125 psi... thats all the
pressure I have.... glad you found your problem
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Re: 727 front bushing
[Re: MR_P_BODY]
#1240075
06/16/12 11:54 AM
06/16/12 11:54 AM
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Joined: Aug 2008
Posts: 4,069
Mo.
racerx
master
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master
Joined: Aug 2008
Posts: 4,069
Mo.
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Quote:
Quote:
For info, found crack at hub in converter! Originally tested with 20# pressure and found nothing. One company rep said that should be enough. Finally took contractor chalk and powdered converter and crack showed immediately. Called company again and rep who sold it to me said pressure test I did probably wasn't enough. They found crack and now deciding what to do! Under warranty! Only 15 runs! Having removed trans SIX times and replacing front pump and seals and bushings hopeful to get fixed.Thanks to all who helped here for input!
The crack at the hub is SORTA common... it cracks
right next to the weld(heat affected zone).. I usually
check the converter with 125 psi... thats all the
pressure I have.... glad you found your problem
Mr. P what tool did u use to test the conv.?Is it something u fab. r purchase?......Thax
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with mr.p, i made my own dowel pins using a 1/2 bolt shank. mine are sticking through the trans case about 1/16". also use the trans case u are indicating to the crank.
