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Old 11-18-2004, 04:58 PM   #1
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700R4 Governor weights and springs

Okay, so I've been reading up on the governor gear and how it works but I'm still confused as to some of the terminology.

Some people talk about the lighter side or heavier side or the primary or secondary side. In my governor, there are C weights on both sides and a heavy spring and a light spring, one on one side and one on the other.

It appears the outer weights are not supposed to be adjusted as the recalibration kit doesn't come with replacement outer weights. I've read that the outer weights govern low vehicle speed shifts and the inner weights govern high vehicle speed shifts.

I realize that this is mostly trial and error but there must be some method to the madness.

I'm trying to raise my shift points and I understand that I need to put in lighter weights. Centripetal force as tranny speed increases causes the weights to move outward actuating the governor valve and forcing a shift. Heavier weights cause this action to happen earlier, lighter weights the opposite.

So if I decrease the weight of one but not the other, I should get a higher shift point. If that's not high enough, do I put in the next lighter weight for the same side change the other one or does it not matter?

Once I get the right engine speed, then I start playing with the springs. Again, I have one light spring and a heavy spring. This one should be easier cause the light spring is the lightest and the heavy is the heaviest. If I need to go lighter, then I get a lighter spring for the heavy side or if I need to go heavier, then I get a heavier spring for the light side. No worries there. Heavier springs apparently group shifts tighter while lighter springs group shifts farther apart.

I've already replaced one of the original weights with the heaviest (but still a little lighter) weight that came with the B&M recalibration kit and in place of the original heavy spring, I put in the heaviest kit spring. What I have now is original C weight + heavy kit spring on one side and a kit heavy weight and kit light spring. Shift points have moved about 300-500 rpm's higher than before and shifting at part throttle feels like it shifts a little later.

So what's next? I plan on putting the next lighter weight in and leaving everything else the same. Probably tonight if I can. Anyone have any other advice?

Thanks in advance.

-Bruce
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Old 11-18-2004, 06:18 PM   #2
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I am going to need help on this too. I want to raise my shifts from 5200 RPM to 5600 to 5800 RPM. I am going to buy the B&M governor spring and weight kit from Summit Racing.
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Old 11-19-2004, 05:26 AM   #3
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LOL, I too need help with this, my tranny shifts too high right now (5400+) I want it to shift around 5200.
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Old 11-19-2004, 05:43 AM   #4
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Bruce89ta pretty much summed it up on how it works, I`m going to be adjusting mine soon also but he rasies a good ? about different wieght and springs on opposite sides, I have seen factory govners that had different size springs from one side to the other so I would guess that that would be okay to do. One way to find out right? Here is the best explanation I`ve seen on how it works http://www.dragracingonline.com/archives.html
Click on the link, then you need to select the october 2004 issue and half way down on the right you will see the article
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Old 11-19-2004, 09:42 AM   #5
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Well, I dropped in the next lightest weight last night. The good news is it only takes me 10 minutes to jack up the car, switch out the weight and get my car driving again. And somewhere I read you'd lose a lot of tranny fluid when you pull the cap. It's nothing. Just enough to get the floor slick.. It's not even enough to fill half a shot glass.

For those of you who don't know, the B&M kit comes with springs from red to purple on spring rate, red being the lightest. Weights come in numbers from 1 to 6, 1 being the heaviest.

So, on to my findings. Now I've got a stock C-weight and the purple spring on one side (closest combo to stock) and the B&M "2" weight and red (one weight lighter than stock) on the other. My shift point moved up another 500 rpms (1st gear) and it's definitely holding each gear longer when I'm at part throttle. It holds 3rd for a lot longer than I'm expecting and I keep thinking the shifter is in "D" rather than "OD".

If I get a chance, I want swap the springs and run the "C" weight and red spring on one side and "2" weight and purple spring on the other just to see what happens.

So from stock governor, my tranny shifted at ~3500 rpms. When I swapped in the B&M parts, I got ~4000 rpms. Now with one lighter weight, ~4500. I wish I could get better numbers for the 2-3 shift and 3-4 shift but I'm doing this in the city and I'd rather not get a speeding ticket.
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Old 11-19-2004, 02:27 PM   #6
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Bruce you got the B&M kit right? Is that the one in the Summit catalog for $29.95?? I was thinking about buying that soon
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Old 11-19-2004, 02:51 PM   #7
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That's the one. It comes with instructions but it's not rocket surgery so it's not like they're needed.. Just helps you identify which springs are what by color, instead of checking the spring rates. Also comes with new pins that hold the weights to the governor body. Very convienent.
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Old 11-19-2004, 08:14 PM   #8
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Quote:
Originally posted by Bruce89TA
That's the one. It comes with instructions but it's not rocket surgery so it's not like they're needed.. Just helps you identify which springs are what by color, instead of checking the spring rates. Also comes with new pins that hold the weights to the governor body. Very convienent.
Cool, thanks alot man. So I guess in my case I would need the heavier weights to make it shift sooner?
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Old 11-22-2004, 10:13 AM   #9
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Yes, you'll need heavier weights to make it shift sooner but if you do put in the new weights (one step heavier), I think it'd be too much and you'd overshoot your target shift point. From 5400 to 5200 you'll have to play around some with the springs as well, OR, you can take the next heavier weight and grind it down some. If you're lucky, the weight you have now won't correspond with the weight values in the kit and you can find one that is just a little heavier than the existing weight and that might be enough to give you 200 RPM less. Like it's been said before, it looks like it's all just trial and error.
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Old 12-07-2004, 06:01 PM   #10
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Well, just as the kit says, lighter weights, later shift points, lighter springs, later shifts.

I tried out about 20 different combinations of springs and weights. If you're looking to raise your shift points, I'd recommend taking the side with the light spring and reducing the weight of it.

My original setup was stock "C" weights on both sides and one heavy spring and one light spring. With the B&M kit, the equivalent would have been #1 weight on both sides and the purple and red.

My current setup is #1 and blue and #4 and green. I have a 700R4 with a Transgo Shift kit and 3.23 gears. at WOT, I shift a little over 5000 (which I still need to tweak a little). Normal cruising, it will shift into 4th gear at 40mph.

The heavier weight governs more of where it's going to shift and the heavier spring should be on that weight. Basically, once the whole assembly starts spinning around, the heavier weight and spring contribute the constant force and the lighter weight and spring give it the last bit of force to actuate the governor valve. I tried putting in heavy weights and soft springs on both sides and at cruise, it wouldn't shift into 4th gear until 55mph. Having heavy weights and heavy springs makes the car shift into 4th gear at 35 mph whether at WOT or cruising.

I ran through a tank of gas to get a baseline for fuel efficiency and it looks like I've gained 1mpg from about 11-12 to 12-13. It's definately got more zip to it.

I figure when I got my tranny rebuilt the not so smart techs replaced the governor gear without remembering what i had in there originally. For those of you in the Dallas metroplex, don't go to Eagle Transmissions in Richardson, I even told them that the early shifting was due to the governor gear not being calibrated and they didn't do jack. They just kept trying to adjust the TV cable.

Good luck to all of you.
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Old 12-12-2004, 10:23 AM   #11
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Thanks for the info... i swapped in a new tranny and had them install my governor from the old tranny. Thinking it would shift at the same points, it didnt. It shifted at 6300 for the 1-2 shift and 4th came in at 53 mph. Part throttle was over 4000 at heavy throttle this want to bad. But my motors peak is around 4900 i had it on a dyno to find out.

The IROC governor had the light weights on the out and inside. And the one i had them remove had the heavy weights. So i replaced just the inside weights of the IROC governor with the heavy weights from the other one. And it dropped the shifts to low. 4300 at wot and 2600 or so at part throttle . I did a little math, and thought that if i just swapped out one side for the heavier weight it should shift at 5300 for wot and 3700 or so for heavy part throttle. It DID and works great so far. No problems running a heaver inside weight on one side. It goes into 4th at 38-40 mph just cruising.
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Old 07-08-2012, 08:27 AM   #12
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Re: 700R4 Governor weights and springs

http://www.dragracingonline.com/tech...vi_9-bm-1.html
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Old 07-08-2012, 09:13 AM   #13
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Re: 700R4 Governor weights and springs

it was an 8 year old thread. he most likely has the governor taken care of....lol
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Old 07-08-2012, 09:26 AM   #14
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Re: 700R4 Governor weights and springs

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it was an 8 year old thread. he most likely has the governor taken care of....lol
Yeah I reposted it for the rest of us .. like myself, and so you can click on the link instead of having to look for it ...
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Old 07-12-2012, 02:16 PM   #15
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Re: 700R4 Governor weights and springs

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Yeah I reposted it for the rest of us .. like myself, and so you can click on the link instead of having to look for it ...
a lot of people rag on us for replying to old threads .i do it to put as much info out there as possible,because there are many many people who read this stuff looking for a answer to their current dilemma .so if someone stumbles upon a similar problem ,theyre not going to care that whatever was posted ever how many years ago.my point info,info,info that is what keeps our rapidly aging DDs alive.post on!!
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Old 06-15-2013, 11:36 PM   #16
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Re: 700R4 Governor weights and springs

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thanks for that link it helped me understand the governor better
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Old 10-16-2014, 03:15 PM   #17
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Re: 700R4 Governor weights and springs

good link, learned a bit more also
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Old 10-16-2014, 03:15 PM
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