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727 problem #1062713
08/25/11 07:03 AM
08/25/11 07:03 AM
Joined: Mar 2005
Posts: 525
Can , Nova Scotia , Cape Breto...
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caper Offline OP
mopar
caper  Offline OP
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Joined: Mar 2005
Posts: 525
Can , Nova Scotia , Cape Breto...
When I was at test and tune last night, when you pust the tranny brake ( griner ) button the car would lurch backward. Anybody know what is causing this? Could it be caused by a front band adjustment too loose?

sheldon


New best 10.18 , 1.40 60 ft 496 Scott Brown built, street driven 3600 lbs,654 hp , 653 ft tq
Re: 727 problem [Re: caper] #1062714
08/25/11 09:05 AM
08/25/11 09:05 AM
Joined: Dec 2009
Posts: 20,600
in a cattle trailer down by th...
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Guitar Jones Offline
Paddle faster! I hear banjo music!
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in a cattle trailer down by th...
Quote:

When I was at test and tune last night, when you pust the tranny brake ( griner ) button the car would lurch backward. Anybody know what is causing this? Could it be caused by a front band adjustment too loose?

sheldon




No, the front band isn't even in use at that point. My guess would be a loss of pressure to the rear clutch assembly or worn rear clutches. This could be clutch seals, valve body leakage, worn bushings or seal ring surfaces. How long has it been together or is this a fresh build?


"Follow me the wise man said, but he walked behind"


'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon!
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
Re: 727 problem [Re: caper] #1062715
08/25/11 09:12 AM
08/25/11 09:12 AM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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Posts: 52,972
Romeo MI
Quote:

When I was at test and tune last night, when you pust the tranny brake ( griner ) button the car would lurch backward. Anybody know what is causing this? Could it be caused by a front band adjustment too loose?

sheldon




Check the adjustments... reverse and low are applied
and in your case reverse is winning

Re: 727 problem [Re: MR_P_BODY] #1062716
08/25/11 10:37 AM
08/25/11 10:37 AM
Joined: Mar 2005
Posts: 525
Can , Nova Scotia , Cape Breto...
C
caper Offline OP
mopar
caper  Offline OP
mopar
C

Joined: Mar 2005
Posts: 525
Can , Nova Scotia , Cape Breto...
I also notice that when you put it in low it doen't engage untill you rev the engine a bit. It was rebuilt last summer , about 60 runs on it. What adjustments do you mean?


New best 10.18 , 1.40 60 ft 496 Scott Brown built, street driven 3600 lbs,654 hp , 653 ft tq
Re: 727 problem [Re: caper] #1062717
08/25/11 11:28 AM
08/25/11 11:28 AM
Joined: Dec 2009
Posts: 1,074
detroit, mi
POS Dakota Offline
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Posts: 1,074
detroit, mi
Quote:

I also notice that when you put it in low it doen't engage untill you rev the engine a bit. It was rebuilt last summer , about 60 runs on it. What adjustments do you mean?




The low band adjustment is inside the pan if it's loose, but the delayed engagement is a tell tale that it may be something hydraulic vs an adjustment.

Re: 727 problem [Re: POS Dakota] #1062718
08/25/11 11:39 AM
08/25/11 11:39 AM
Joined: Dec 2009
Posts: 20,600
in a cattle trailer down by th...
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Guitar Jones Offline
Paddle faster! I hear banjo music!
Guitar Jones  Offline
Paddle faster! I hear banjo music!
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Joined: Dec 2009
Posts: 20,600
in a cattle trailer down by th...
No adjustment is going to fix that, you are losing pressure somewhere.


"Follow me the wise man said, but he walked behind"


'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon!
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
Re: 727 problem [Re: Guitar Jones] #1062719
08/25/11 11:59 AM
08/25/11 11:59 AM
Joined: Dec 2009
Posts: 1,074
detroit, mi
POS Dakota Offline
super stock
POS Dakota  Offline
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Posts: 1,074
detroit, mi
Quote:

No adjustment is going to fix that, you are losing pressure somewhere.




yeah, that's pretty much my thought on it. and the longer the delay in resolving it, the more damage.







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