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| A904 Governer Spring https://www.slantsix.org/forum/viewtopic.php?t=40648 |
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| Author: | ceej [ Tue Jun 15, 2010 8:57 pm ] |
| Post subject: | A904 Governer Spring |
Mine is Green. This is effectively good for tranny shifting at 4100 rpm. I want 5000 rpm. Is this a part that can be had? What might that color bee? (Had to sneak that reference in there! I suppose I could cut some material out of the weight, but it would be difficult to judge how much material would be needed to make xxx rpm. How about shims on the plug? What would the thickness bee? (I did it again!  )CJ |
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| Author: | hellion_locdogg [ Tue Jun 15, 2010 9:05 pm ] |
| Post subject: | |
This question was just asked not long ago, here was the answer. http://www.aandatrans.com/Departments/C ... -Kits.aspx Or you can just do a manual shift and stretch it out. Just know where you stop making hp and torque. Depending on cam and gearing you may just want it to short shift for you. ,Cliff |
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| Author: | 75duster [ Tue Jun 15, 2010 11:30 pm ] |
| Post subject: | |
i just pull the lever to manual first if i want to hold rpm a little longer at the track. |
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| Author: | ceej [ Thu Jun 17, 2010 10:15 pm ] |
| Post subject: | |
I know I can spend $80 with shipping to buy a 727 governor. Inside that little gizmo, there is a spring. Mine is Green. That means there is a color code for mopar springs somewhere out there, allowing for spring rate changes. Instead of paying eighty bucks for something that may or may not function correctly in my 904, I want to find a replacement spring. Different question entirely. CJ |
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| Author: | hellion_locdogg [ Thu Jun 17, 2010 10:29 pm ] |
| Post subject: | |
You're welcome. ,Cliff |
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| Author: | bigslant6fan [ Thu Jun 17, 2010 10:54 pm ] |
| Post subject: | - |
Your shift point is determined by the governer weight,line pressure,kick-down linkage adjustment,and the 1-2 and 2-3 shift springs in the valve body.60s-early 70s trans had lighter governer weights,sometimes the outer weight was lighter, sometimes,the inner.Bear in mind if you install a shift kit,it will raise your shift points by it's self.Even the mildest shift kit like the Trans-go TF-1 will raise the line pressure by 30%,and your shift point by about 15% |
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| Author: | hellion_locdogg [ Thu Jun 17, 2010 10:58 pm ] |
| Post subject: | |
THE GOV BODY IS THE SAME DUDE. 727 & 904 are very similar. Good luck finding just the spring. http://cgi.ebay.com/ebaymotors/Torquefl ... ccessories ,Cliff Save the atitude next time... |
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| Author: | ceej [ Thu Jun 17, 2010 11:08 pm ] |
| Post subject: | |
I apologize. I've seen that link before, and we've talked about that part before. No one has been able to tell me that the 5000 rpm governor they offer delivers 5000 rpm in the 904. I already have a shift kit, and have kitted up the 1-2 and 2-3 springs along with line pressure and TV pressure. That got me very little, as the governor is not very throttle-able. I was going to chuck a governor outer weight up in my lathe and turn it down, but not knowing how much material to remove to reach a goal keeps me from doing so. Have you run one of those governors in a slant? I'm simply not going to send that much dough out for something that may or may not solve the problem. Hopefully that explains, though certainly doesn't excuse getting short with you. Once again, I'm sorry. CJ |
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| Author: | emsvitil [ Fri Jun 18, 2010 1:26 am ] |
| Post subject: | |
What's the relationship with the governor spring and weight? I know stiffer springs for the 1-2 and 2-3 shift points in the valve body will raise the shift points. So with the governor does stiffer spring = higher shift point or lower Greater weight = lower shift point or higher? If a stiffer spring is higher shift point, you could always shim it..... |
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| Author: | ceej [ Fri Jun 18, 2010 5:47 am ] |
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That is the way I understand it. A shim would be a possibility. The other option is to take the spring and have the rate measured accurately, then replace it with a stronger spring rate. The question would be how much shim would bring the shift point up, and/or what increase in spring rate would move the shift point how far? A shim will increase weight a small amount too. Is a linear approach to spring rate close enough? CJ |
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| Author: | hellion_locdogg [ Fri Jun 18, 2010 2:05 pm ] |
| Post subject: | |
Hey Ceej, I looked around and found a few articles, yes they were for the 727, but you may be able to gather enough info to make a better comparison. If I were you I would call TF Patty and ask him. He is very helpful and would def lead you down the right track. http://www.moparmusclemagazine.com/tech ... to_10.html ,Cliff No harm no foul. |
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| Author: | sandy in BC [ Fri Jun 18, 2010 2:38 pm ] |
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Dont know 904s for nothing...... But on GM govenors the springs can change your shift point. They are itty bitty things and not hard to find . Try a trans shop.....try a machine shop spring collection. |
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| Author: | ceej [ Sat Jun 19, 2010 7:27 pm ] |
| Post subject: | |
Had a nice visit with Doug Powers over at the Mueller/Slant Six HQ, Woodburn Drag Strip, Oregon!  Doug has been doing research. Two issues that have been a problem for some folks are; Governor weights/springs, and flaring on a manual 1-2 shift. Governor weights: Doug weighed a bunch of them, and found some to be 13 grams lighter. Some come with a heavier rate spring, though he didn't have any numbers. The ratio of the front lever on the slant is something like 2.9:1 Replacing it with a V8 lever, 3.x or 4.x:1, or a cummins turbo diesel 5:1 lever makes the front band apply and release quicker. If flaring is the problem, a delay in the front band apply where the engine speed bumps up slightly with a sluggish apply, increasing the ratio of the lever speeds things up.  Good info! CJ |
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| Author: | Charrlie_S [ Sun Jun 20, 2010 8:03 am ] |
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Quote:
The ratio of the front lever on the slant is something like 2.9:1
I am thinking a higher number lever, would increase the clamping force, but take longer to apply. I could be wrong, so don't take that as gospel.
Replacing it with a V8 lever, 3.x or 4.x:1, or a cummins turbo diesel 5:1 lever makes the front band apply and release quicker. If flaring is the problem, a delay in the front band apply where the engine speed bumps up slightly with a sluggish apply, increasing the ratio of the lever speeds things up. Good info! CJ |
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| Author: | bigslant6fan [ Mon Jun 21, 2010 8:54 am ] |
| Post subject: | - |
I have used governers for $20 each. Most S/6 904s have 3.8 kickdown levers. Take note the dia. of the gov. weight was increased by 0.070 in the early 80s. |
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