Might play with the gov weight in my 47rh- I want 500 rpm more at wot shifts

[SCHMITTY]

The tranny shifted well at 2900-3000 by itself but the truck ran much faster with me shifting it at 33-3400. I have it apart right now and I have access to old 727 governors, I have a scale , and time. The vb has the tfod hd2 shift kit and the tranny was at 175 psi tested from the accumulator port. I upgraded to a triple disk with a stock stall speed, 5x.016s, 7mms, and a 64/74/14. The 180 pump has 4ks and 19* timing. I plan on timing the pump 22-24*. I'd just like it to shift that high by itself.

Does anybody know what a v10 shifts at wot ? And what how much the governors weights weigh ? I also have access to a 47rh gov that was bolted up to a 5.9 gasser.

Tia

[SCHMITTY]

This is with the he351cw, 026 dv's, 5x.016s, 180 pump at 19*, 140 gph pro comp black "pusher" pump, 3.54 gears with the old 4.10 speedo gear in the tcase still. It reads 1.56% slower than I'm actually going.

The vb also has the 24v/gasser shift timing spring in it.


https://m.youtube.com/watch?v=7AxNmu4RlCA

[56cummins]

I would go through the junker drag truck thread that Will did.

[SCHMITTY]

I've read it before. It's been awhile. I guess I could tie my tv lever wot

[Big Blue24]

Originally Posted by SCHMITTY

I've read it before. It's been awhile. I guess I could tie my tv lever wot

That's a good start. You could also replace the TV spring in the VB with a heavier spring. You could also replace the 1-2 and/or 2-3 shift springs in the VB with heavier springs, you can add a bleed orifice to the VB to bleed off some governor pressure, you can add a heavier valve to the governor assembly, or you can lighten the governor weights on the governor assembly.

In short, there's a quite a few ways to skin this cat, test, experiment, learn, and have fun, that's what it's all about!

[kawi600]

How much can you mess with the TV setting without burning up the trans? Thats all thats kept me from changing the setting to get some extra RPM on mine

[SCHMITTY]

Some people have tied there's all the way so the lever is maxed out - for track use. I'm going to copy a TV lever bponci made. I'm going to go through the junker drag truck thread again and see what he got out of his. I spoke with Trans go today and they said playing with the spring tension on the little valve in the governor would help raise the shift points but there's is going to be some trial and error. I spoke with A&a transmission in Indiana - they build a lot of custom 727 governor kits but they figured I could get what I want from the valve body.

There's a shop down the road from me and they have some rh cores and governors. But they are from v8s. A v10 rh governor will be harder to come by.

[jasonc]

I used to run an RH in my drag truck with lighter gov weights and a bunch of trial and error to get it to shift at about 3800. Also made an adjuster turn buckle for the tv lever that could be fine tuned, with it tied all the way back it would shift to second perfect but hang 3rd gear so I had to compromise and bring the tv lever back some and short shift second a little to get 3rd at the right time. I've pulled the valvebody for changes more times than I remember and finally gave up and went manual valvebody and not going back.

[mathews8pt]

Originally Posted by SCHMITTY

Some people have tied there's all the way so the lever is maxed out - for track use. I'm going to copy a TV lever bponci made. I'm going to go through the junker drag truck thread again and see what he got out of his. I spoke with Trans go today and they said playing with the spring tension on the little valve in the governor would help raise the shift points but there's is going to be some trial and error. I spoke with A&a transmission in Indiana - they build a lot of custom 727 governor kits but they figured I could get what I want from the valve body.

There's a shop down the road from me and they have some rh cores and governors. But they are from v8s. A v10 rh governor will be harder to come by.

I have a v10 RH core sitting At the shop. I'd trade the v10 gov for a diesel one probably.

Originally Posted by jasonc

I used to run an RH in my drag truck with lighter gov weights and a bunch of trial and error to get it to shift at about 3800. Also made an adjuster turn buckle for the tv lever that could be fine tuned, with it tied all the way back it would shift to second perfect but hang 3rd gear so I had to compromise and bring the tv lever back some and short shift second a little to get 3rd at the right time. I've pulled the valvebody for changes more times than I remember and finally gave up and went manual valvebody and not going back.

Was the TV valve ground down in that vb? I have seen a lot of problems with RH valve body's hanging the 2-3 shift and it's usually fixed with shortening the stem on the tv valve like Transgo use to recommend in their kits.


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[jasonc]

Its been awhile since I ran that setup, Garmon was the one making the changes along with a friend of.mine who builds trans so I don't remember all that was tried. When I was running smaller turbos it was perfect but trying for 3800 to 4000 and after changing the gov weights is when it started the hanging. Be honest by then I had enough and went manual.

[zstroken]

I know I went from a TV spring from a 1997 to one from a 24V and my shifts went up approximately 250RPM. I would look at a spring from a V10, and see if it is different from the one you have.

[SCHMITTY]

I have a spare diesel govenor. The little valve was starting to develope a lip so I swapped it out. I'll post a pic and I'd be willing to trade it for the v10 govenor.

I have the 24v/ gas pt valve spring installed and the green TV spring. Maybe I'll throw a couple washers in with the green spring or look for a stiffer one

[SCHMITTY]

I might just see what I can get out playing with the TV spring and a break over TV lever and just manually column shift it at the track. My old best was 13.71 with the truck short shifting. I manually shifted a month after I went to the track and it felt like the truck would have picked up a few tenths at least.

[SCHMITTY]

Here is the damage on my spare diesel governor

[mathews8pt]

Originally Posted by SCHMITTY

Here is the damage on my spare diesel governor

I typically replace that valve with the sonnax one anyways. The brass one on the other side is what I would really need and what would make the most difference for you. Il have to take the core I have at the shop apart and make sure it has a lighter v10 gov in it.


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[Big Blue24]

I could never get the Junker to shift higher than 2400 rpm with the stock TV spring, and with the green transgo shift kit spring, I think around 2550 was all it would do. It wasn't till I lightened the governor weight(s) that I started getting more tune-ability.

Now that I build transmissions professionally, I try to make most of the shift point changes with valvebody mods so they are more easily "tune-able" if we get a finicky tranny that doesn't want to shift at the customer's specified RPM range. It's much easier to change out a valvebody than pulling a tranny to work on the governor setup...

[SCHMITTY]

True. I have pulled my t case and overdrive to replace the stock output before without it being a problem though. Mine was shifting 1-2 and 2-3 at 2900/3000 . I'm thinking about shimming the TV spring and possibly the pressure spring. I was hitting 175 psi before I burned up the direct drum. 30k miles out of my first rebuild isn't too bad. I launched it at least 50 times in 4hi

[SCHMITTY]

I read through the junker build last night. So would you say drilling out the stock weight wasn't worth it ? I was thinking about drilling mine out a little more than you drilled yours

[Big Blue24]

Originally Posted by SCHMITTY

I read through the junker build last night. So would you say drilling out the stock weight wasn't worth it ? I was thinking about drilling mine out a little more than you drilled yours

Lightening the stock weight definitely raised the shift point, however, the V-10 weights are lighter than you could reasonably make the stock diesel weights just drilling them out so you'll only gain a couple hundred RPM... which is a great start.

[SCHMITTY]

I see. Well maybe I'll find a v10 governor