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Re: can an auto trans shift "too hard", causing damage?
[Re: RSNOMO]
#1579759
02/18/14 08:26 PM
02/18/14 08:26 PM
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Joined: Jan 2003
Posts: 75,094
A Banana Republic near you.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,094
A Banana Republic near you.
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Quote:
That trans is WAY too radical for what you're doing...
And it's gonna find the weakest point...
Zing..
Lose the 5.0 lever and the accumulator blocker rod. Put a 3.8 lever in it , 5.0 is a HEMI part that helped apply more leverage on the wide hemi band , it may apply quicker but it releases slower ...
or does it apply slower and release faster ??? 
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Re: can an auto trans shift "too hard", causing damage?
[Re: JohnRR]
#1579760
02/18/14 09:02 PM
02/18/14 09:02 PM
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Joined: Aug 2003
Posts: 12,589
Sacramento, CA
cal_gecko
OP
I Live Here
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OP
I Live Here
Joined: Aug 2003
Posts: 12,589
Sacramento, CA
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Quote:
Quote:
That trans is WAY too radical for what you're doing...
And it's gonna find the weakest point...
Zing..
Lose the 5.0 lever and the accumulator blocker rod. Put a 3.8 lever in it , 5.0 is a HEMI part that helped apply more leverage on the wide hemi band , it may apply quicker but it releases slower ...
or does it apply slower and release faster ???
HUH???
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Re: can an auto trans shift "too hard", causing damage?
[Re: mcmopars]
#1579762
02/18/14 09:18 PM
02/18/14 09:18 PM
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Joined: Feb 2004
Posts: 1,012
indiana
mcmopars
super stock
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super stock
Joined: Feb 2004
Posts: 1,012
indiana
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Quote:
in your first statement you said it is a griener rpmvb,now you state its and automatic????
sorry my bad
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Re: can an auto trans shift "too hard", causing damage?
[Re: JohnRR]
#1579763
02/18/14 09:41 PM
02/18/14 09:41 PM
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Joined: Apr 2011
Posts: 280
GEORGIA
barracuda7199
enthusiast
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enthusiast
Joined: Apr 2011
Posts: 280
GEORGIA
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Quote:
Quote:
That trans is WAY too radical for what you're doing...
And it's gonna find the weakest point...
Zing..
Lose the 5.0 lever and the accumulator blocker rod. Put a 3.8 lever in it , 5.0 is a HEMI part that helped apply more leverage on the wide hemi band , it may apply quicker but it releases slower ...
or does it apply slower and release faster ???
why lose the blocker rod? what about the 4.2 lever?
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Re: can an auto trans shift "too hard", causing damage?
[Re: cal_gecko]
#1579764
02/18/14 11:34 PM
02/18/14 11:34 PM
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Joined: Apr 2012
Posts: 18,880
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RSNOMO
Moparts Torchbearer
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Moparts Torchbearer
Joined: Apr 2012
Posts: 18,880
-
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Quote:
HUH???
Blocking the accumulator firms-up the shift...
'5.0' lever takes the kick-down shift point upstairs...
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Re: can an auto trans shift "too hard", causing damage?
[Re: cal_gecko]
#1579765
02/19/14 12:35 AM
02/19/14 12:35 AM
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Joined: Jan 2003
Posts: 1,767
Windsor, ON, Canada
Diplomat360
top fuel
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top fuel
Joined: Jan 2003
Posts: 1,767
Windsor, ON, Canada
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Quote:
Quote:
Quote:
That trans is WAY too radical for what you're doing...
And it's gonna find the weakest point...
Zing..
Lose the 5.0 lever and the accumulator blocker rod. Put a 3.8 lever in it , 5.0 is a HEMI part that helped apply more leverage on the wide hemi band , it may apply quicker but it releases slower ...
or does it apply slower and release faster ???
HUH???
Sorr cal_geco, that's my fault...I responded to your original post and JohnRR responded to one of my posts which started a sub-conversation...
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Re: can an auto trans shift "too hard", causing damage?
[Re: barracuda7199]
#1579766
02/20/14 11:26 AM
02/20/14 11:26 AM
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Joined: Jan 2003
Posts: 75,094
A Banana Republic near you.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,094
A Banana Republic near you.
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Quote:
Quote:
Quote:
That trans is WAY too radical for what you're doing...
And it's gonna find the weakest point...
Zing..
Lose the 5.0 lever and the accumulator blocker rod. Put a 3.8 lever in it , 5.0 is a HEMI part that helped apply more leverage on the wide hemi band , it may apply quicker but it releases slower ...
or does it apply slower and release faster ???
why lose the blocker rod? what about the 4.2 lever?
3.8 or 4.2 ...
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Re: can an auto trans shift "too hard", causing damage?
[Re: JohnRR]
#1579767
02/20/14 11:52 AM
02/20/14 11:52 AM
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Joined: Jun 2006
Posts: 5,166
CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,166
CT
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The 5.0 lever on a regular non-hemi band usually causes excessive shift overlap and can actually cause the output shaft to lock up in between shifts. If you want to verify put the car on a lift, have someone start in low and bring it up to speed. Watch the tires as they select second. If you see the wheels stop in between shifts you have too much overlap.
Alot of times you need to install a restrictor plug on one of the ports (not sure which) to delay the apply to eliminate this with the 5.0 lever. I will say though I've been in a car that had this issue fixed by Fairbanks back in the 80s, and even with the restrictor, with the 5.0 lever that car will launch you forward on a 1-2 shift like you wouldn't believe with a stock 383.
Last edited by GTX MATT; 02/20/14 11:54 AM.
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: can an auto trans shift "too hard", causing damage?
[Re: GTX MATT]
#1579768
02/20/14 04:51 PM
02/20/14 04:51 PM
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Joined: Jan 2003
Posts: 25,988
Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,988
Rio Linda, CA
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Overlap on the 1-2 upshift isn't caused by the lever ratio, it's caused by a rear servo that's slow to release.
As I've stated many times, shift phenomenon observed on jackstands isn't the same as when the car is under power.
The INTERNET, the MISinformation superhighway
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Re: can an auto trans shift "too hard", causing damage?
[Re: John_Kunkel]
#1579769
02/20/14 05:11 PM
02/20/14 05:11 PM
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Joined: Jun 2006
Posts: 5,166
CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,166
CT
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Yes but you can only get the rear servo to release so fast, no? You can only fit so much spring in there.
What changes on jackstands vs out on the road? I'm just going off of what Fairbanks was doing in the 80s.
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: can an auto trans shift "too hard", causing damage?
[Re: GTX MATT]
#1579770
02/20/14 09:35 PM
02/20/14 09:35 PM
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Joined: Jan 2003
Posts: 25,988
Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,988
Rio Linda, CA
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When under power the car's momentum will "drive through" some overlap so it's barely noticeable, when it's on jackstands there is minimal load on the trans so overlap becomes more visible.
The INTERNET, the MISinformation superhighway
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Re: can an auto trans shift "too hard", causing damage?
[Re: GTX MATT]
#1579774
02/21/14 11:45 AM
02/21/14 11:45 AM
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Joined: Jan 2003
Posts: 75,094
A Banana Republic near you.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,094
A Banana Republic near you.
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Quote:
Quote:
When under power the car's momentum will "drive through" some overlap so it's barely noticeable, when it's on jackstands there is minimal load on the trans so overlap becomes more visible.
Thats kind of what I figured, but I thought that was the idea behind putting it on the lift also, on the road you wouldn't notice it or you would assume it was barking the tires because of a hard apply rather than a bind between gears. Would it be okay for the car to do this when there's no load on it?
The 727 by design has overlap of the 2-3 , Chrysler engineers put a lot of thought and effort into making it has minimal as possible ...
Add a shift kit and you screw that all up ...
As John K said , running it on a lift is not going to tell you what you think it is .
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Re: can an auto trans shift "too hard", causing damage?
[Re: cal_gecko]
#1579775
02/21/14 04:18 PM
02/21/14 04:18 PM
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Joined: Dec 2012
Posts: 85
Rio Linda, CA
nytemuvr
member
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member
Joined: Dec 2012
Posts: 85
Rio Linda, CA
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Get a torque strap as even driving around town under light throttle is hard on the rubber engine mounts. I put a Transpak and reconfigured the valve body, removed the accumulator piston when my Challenger was 6 months old. I had to change driver side motor mounts a lot. But once I started a powerstand and let off the brakes it would sit in one place and shift though the gears burning the tires off. That transmission still snapped 2nd gear rubber in drive on a WOT until I rebuilt it at 186K miles in '95. I returned it to mostly stock configuration then, but it still picks up 2nd gear rubber as it did from the factory in '71 with Polyglas tires. It jumps sideways about a foot on a WOT 1-2 shift in drive now. [Email]340ci@400+[/Email] hp, 400 hp was as high as the old analog dynos registered. Stock Mopar 2850 rpm torque converter, 3.55 SG. 5.0 lever is really hard on everything.
1972 Challenger 340(original owner)
1968 D100
1997 HD Road King
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