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727 accumulator spring. needed or not? #1403894 03/17/13 08:08 PM 03/17/13 08:08 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert OP Circle Track
RapidRobert OP Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Street high performance. Installing an already modified VB into an already built 727 for a customer & noticed there was no spring on top of the accumulator piston so I stopped right there. Piston seemed quite aways down in the bore but I'm assuming that is normal. Thank you for your time live every 24 hour block of time like it's your last day on earth

Re: 727 accumulator spring. needed or not? [Re: RapidRobert] #1403895 03/17/13 09:23 PM 03/17/13 09:23 PM
Joined: Jan 2003 Posts: 27,421 Balt. Md 3 383man Too Many Posts
383man Too Many Posts 3 Joined: Jan 2003 Posts: 27,421 Balt. Md	For street/strip cars I leave the spring out and use a blocker rod to keep the piston from moving. It will give a much firmer shift. Ron

Re: 727 accumulator spring. needed or not? [Re: RapidRobert] #1403896 03/17/13 09:39 PM 03/17/13 09:39 PM
Joined: Dec 2005 Posts: 4,231 State of retirement 5 52savoy master
52savoy master 5 Joined: Dec 2005 Posts: 4,231 State of retirement	Doesn't make any difference on the spring being out. I never used a blocker rod.. until recently when I rebuilt the 518 for my truck. Don't see any difference still

Re: 727 accumulator spring. needed or not? [Re: 52savoy] #1403897 03/17/13 10:07 PM 03/17/13 10:07 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert OP Circle Track
RapidRobert OP Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Alright I'll button it up & get it out the door with no spring/blocker rod & collect my money. Thanks guys live every 24 hour block of time like it's your last day on earth

Re: 727 accumulator spring. needed or not? [Re: 52savoy] #1403898 03/18/13 01:03 PM 03/18/13 01:03 PM
Joined: Jan 2003 Posts: 27,421 Balt. Md 3 383man Too Many Posts
383man Too Many Posts 3 Joined: Jan 2003 Posts: 27,421 Balt. Md	Quote: Doesn't make any difference on the spring being out. I never used a blocker rod.. until recently when I rebuilt the 518 for my truck. Don't see any difference still If you use a blocker rod with the spring in then it does not matter with the spring but if you leave the spring in without the blocker rod then its the stock setup. That will do what it is supposed to do and cushion the shift. Much firmer shift without the spring. Ron Last edited by 383man; 03/18/13 01:04 PM.

Re: 727 accumulator spring. needed or not? [Re: 383man] #1403899 03/18/13 02:05 PM 03/18/13 02:05 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert OP Circle Track
RapidRobert OP Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	It didn't come with a spring when it was dropped off to me & no blocker rod either so unless someone persuades me ASAP to make a blocker rod or add the spring (I have a parts 904 belly up & it's spring looks like a good fit) I'll go ahead & install the VB/pan this afternoon & send er out the door. live every 24 hour block of time like it's your last day on earth

Re: 727 accumulator spring. needed or not? [Re: RapidRobert] #1403900 03/18/13 02:15 PM 03/18/13 02:15 PM
Joined: Jan 2003 Posts: 75,005 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,005 U.S.S.A.	Quote: It didn't come with a spring when it was dropped off to me & no blocker rod either so unless someone persuades me ASAP to make a blocker rod or add the spring (I have a parts 904 belly up & it's spring looks like a good fit) I'll go ahead & install the VB/pan this afternoon & send er out the door. Put in the spring , the main purpose is to dampen the trans when it's put into 1st or drive , firmer shifts are a placibo effect from the shift kit ...

Re: 727 accumulator spring. needed or not? [Re: JohnRR] #1403901 03/18/13 02:34 PM 03/18/13 02:34 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert OP Circle Track
RapidRobert OP Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Alright, if the spring will benefit it from dampening when put in drive & ain't going to adversely affect the quality of the shift from the added shift kit I will go ahead & install the spring as this guy does want a firm/crisp shift live every 24 hour block of time like it's your last day on earth

Re: 727 accumulator spring. needed or not? [Re: 383man] #1403902 03/18/13 05:06 PM 03/18/13 05:06 PM
Joined: Jan 2003 Posts: 25,791 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,791 Rio Linda, CA	Quote: Much firmer shift without the spring. Ron Oldest myth in the Mopar world....the spring has no affect on any upshifts. The INTERNET, the MISinformation superhighway

Re: 727 accumulator spring. needed or not? [Re: John_Kunkel] #1403903 03/18/13 05:28 PM 03/18/13 05:28 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert OP Circle Track
RapidRobert OP Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	John I am heading outside to the garage. Should I USE or NOT USE the spring live every 24 hour block of time like it's your last day on earth

Re: 727 accumulator spring. needed or not? [Re: RapidRobert] #1403904 03/18/13 05:33 PM 03/18/13 05:33 PM
Joined: Jan 2003 Posts: 75,005 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,005 U.S.S.A.	Quote: John I am heading outside to the garage. Should I USE or NOT USE the spring it's YOUR choice . I have switched from no spring and blocker to putting in the spring after seeing John post about it more times than he cares to remember.

Re: 727 accumulator spring. needed or not? [Re: John_Kunkel] #1403905 03/18/13 06:57 PM 03/18/13 06:57 PM
Joined: Jan 2003 Posts: 27,421 Balt. Md 3 383man Too Many Posts
383man Too Many Posts 3 Joined: Jan 2003 Posts: 27,421 Balt. Md	Quote: Quote: Much firmer shift without the spring. Ron Oldest myth in the Mopar world....the spring has no affect on any upshifts. I disagee. I have taken and blocked the accumulator piston from moving with manual valve bodies and get a much harder 1-2 shift. It only has three ports to the accumulator as I know you know that but with line pressure on the bottom and front band apply pressure on the spring side it will cushion the 1-2 shift. Even my Mopar training books tell how it cushions the 1-2 shift so without the spring and a blocker rod the accumulator cant move when front band apply pressure is put on it like it will with the spring and band apply press. I know the stock valve body also has the 1-2 shift control press thats actually metered throttle press to the third middle port but I am telling you they all shift harder for me with the psiton blocked and the spring out. I even had a stock 4 cyl Caravn that a came into the shop with the complaint of a harsh 1-2 shift and I found out the first ownwer had removed the accumulator spring. Once I reinstalled one it has a much smoother 1-2 shift. I do agree that just removing the spring wont make a big difference as you have to use a blocker rod to keep the piston from moving. Ron Last edited by 383man; 03/18/13 07:05 PM.

Re: 727 accumulator spring. needed or not? [Re: JohnRR] #1403906 03/18/13 07:03 PM 03/18/13 07:03 PM
Joined: Jan 2003 Posts: 27,421 Balt. Md 3 383man Too Many Posts
383man Too Many Posts 3 Joined: Jan 2003 Posts: 27,421 Balt. Md	Quote: Quote: It didn't come with a spring when it was dropped off to me & no blocker rod either so unless someone persuades me ASAP to make a blocker rod or add the spring (I have a parts 904 belly up & it's spring looks like a good fit) I'll go ahead & install the VB/pan this afternoon & send er out the door. Put in the spring , the main purpose is to dampen the trans when it's put into 1st or drive , firmer shifts are a placibo effect from the shift kit ... Thats not the only or main thing it does. Its funny how when ever I read about them they always talk about how it cushions the 1-2 shift before they tell you how the piston buttons the spring side when line press is applied to the bottom when put in gear and applies the rear clutch. Ron

Re: 727 accumulator spring. needed or not? [Re: 383man] #1403907 03/18/13 07:37 PM 03/18/13 07:37 PM
Joined: Jan 2003 Posts: 25,791 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,791 Rio Linda, CA	Quote: I disagee. I have taken and blocked the accumulator piston from moving with manual valve bodies and get a much harder 1-2 shift. Blocking the accumulator piston and merely removing the spring are two entirely different things. My comment was in reply to your comment "Much firmer shift without the spring"...you failed to mention the addition of the blocker rod in that statement. The myth is that simply removing the spring will firm the shift...not so. The INTERNET, the MISinformation superhighway

Re: 727 accumulator spring. needed or not? [Re: John_Kunkel] #1403908 03/18/13 07:42 PM 03/18/13 07:42 PM
A Anonymous Unregistered
Anonymous Unregistered A	So what does the spring do? I would think if you don't have the blocker rod, you should run the spring, but . . .? ? ?

Re: 727 accumulator spring. needed or not? [Re: RapidRobert] #1403909 03/18/13 08:17 PM 03/18/13 08:17 PM
Joined: Feb 2005 Posts: 4,313 Prospect, PA BSB67 master
BSB67 master Joined: Feb 2005 Posts: 4,313 Prospect, PA	Am I the only one that feels that it is a little odd that the OP is working on a customer's transmission, and he is on here asking about the accumulator spring?

Re: 727 accumulator spring. needed or not? #1403910 03/18/13 08:20 PM 03/18/13 08:20 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert OP Circle Track
RapidRobert OP Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	It is out the door with no spring/no rod. The customer purchased this built up 727 & a seperate shift kitted VB & I am being paid to install the VB/filter/pan gasket/pan however when I took the pan off to do this 15 minute job I noticed there was no spring in the accumulator so I figured I'd better check in with the pros before I made another move. Thank you all for the interest/info/discussion. Later on I will be doing the 440/727 install for him so if he has a problem with the trans' manners I will deal with it at that point in time. live every 24 hour block of time like it's your last day on earth

Re: 727 accumulator spring. needed or not? [Re: BSB67] #1403911 03/18/13 08:24 PM 03/18/13 08:24 PM
Joined: Jan 2003 Posts: 5,443 Indiana Y YO7_A66 master
YO7_A66 master Y Joined: Jan 2003 Posts: 5,443 Indiana	That was a low shot! This forum is all about asking questions no matter how much experience one has. He was not 100% sure so he asked the question. That is smart in my book. 1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)

Re: 727 accumulator spring. needed or not? [Re: BSB67] #1403912 03/18/13 08:52 PM 03/18/13 08:52 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert OP Circle Track
RapidRobert OP Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Quote: Am I the only one that feels that it is a little odd that the OP is working on a customer's transmission, and he is on here asking about the accumulator spring? Yeah you're the only one. I'm thinking that the unknown builder who put this together left the spring out for a reason otherwise it would have been in there but he may not have the expertise that we collectively have here so I figured it was definitely worth an interuption to find out & at the moment I have a 904 belly up & the spring looked like a good fit & I could have cut a blocker from something & iirc PVC pipe was mentioned once all at additional cost to the customer of course live every 24 hour block of time like it's your last day on earth

Re: 727 accumulator spring. needed or not? [Re: YO7_A66] #1403913 03/18/13 09:43 PM 03/18/13 09:43 PM
Joined: Feb 2005 Posts: 4,313 Prospect, PA BSB67 master
BSB67 master Joined: Feb 2005 Posts: 4,313 Prospect, PA	Quote: That was a low shot! This forum is all about asking questions no matter how much experience one has. He was not 100% sure so he asked the question. That is smart in my book. I think you're missing the point. I have no problem with amateurs asking amateurs and/or professionals questions when someone is working on their stuff or a friends stuff, but he is being paid. So you pay an electrician to wire a switch in your house, and you must think it is okay that he asks you, or goes on-line to ask non-professionals how to do it.

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