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Old 11-21-2020, 01:09 PM   #1
tdangle
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2004R Calibration

Has anyone been successful in raising the part throttle shift points on their 2004R transplant. I realize it was calibrated for a high rear gear and I have a low gear, 4.10 to be exact. It thinks I'm traveling much faster than I am due to the increased driveshaft speed. The think will go into 4th by 35-40 and doesn't really respond to 50-60% throttle as I would expect. Yes the TV cable is properly adjusted and my understanding is this is not how you set the shift points.
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Old 11-21-2020, 01:28 PM   #2
The Rocknrod
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Re: 2004R Calibration

I have read where people trim the weights in the governor to change the shift point.
https://www.chevytalk.org/fusionbb/s...php?tid/283173
https://www.hotrodders.com/threads/c...ission.221004/
Here is a good thread on this forum - http://67-72chevytrucks.com/vboard/s...4&postcount=19
Now to find out where to get those governors. Maybe Monster can help? - https://www.monstertransmission.com/...or_c_5183.html
Do not attempt to adjust the shift timing with the throttle valve cable. The shift timing is controlled by the governor springs. For higher shift points at wide-open throttle, install lighter springs. For lower shift points at wide-open throttle, install stronger springs. - https://transmissioncenter.net/shop/200-r4-tip-sheet/
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Old 11-21-2020, 08:02 PM   #3
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Re: 2004R Calibration

Quote:
Originally Posted by The Rocknrod View Post
I have read where people trim the weights in the governor to change the shift point.
https://www.chevytalk.org/fusionbb/s...php?tid/283173
https://www.hotrodders.com/threads/c...ission.221004/
Here is a good thread on this forum - http://67-72chevytrucks.com/vboard/s...4&postcount=19
Now to find out where to get those governors. Maybe Monster can help? - https://www.monstertransmission.com/...or_c_5183.html
Do not attempt to adjust the shift timing with the throttle valve cable. The shift timing is controlled by the governor springs. For higher shift points at wide-open throttle, install lighter springs. For lower shift points at wide-open throttle, install stronger springs. - https://transmissioncenter.net/shop/200-r4-tip-sheet/
I have read some of those posts also. I'm not sure I want to experiment with my only governor and these seem to be fairly rare. If I had it to do again, I would have gone with a 4l60e so I could adjust the shift points with the controller
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Old 11-21-2020, 08:48 PM   #4
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Re: 2004R Calibration

I like the lighter springs idea in the last link.
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Old 11-23-2020, 08:28 AM   #5
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Re: 2004R Calibration

If Transgo makes a shift reprogramer kit for that trans it should come with governor springs and some recommendations for a starting point.
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Old 11-23-2020, 08:42 AM   #6
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Re: 2004R Calibration

https://transgo.com/product-details/sk-200-4r/
They say their kit fixes late or early shifts.
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Old 11-24-2020, 01:43 AM   #7
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Re: 2004R Calibration

Springs alone won't make drastic changes. Finding a "HP" Turbo Buick or Monte Carlo SS Valve Body & Governor will be the BEST starting point.

I stopped building 700R4 & 2004R because it was always assumed that tuning shift points is included in a rebuild. I got scars up & down my arms pulling Governors. People ask if I got a skin condition.....I have a "Got Burnt 100,000 times" condition!!

Take the Governor Springs completely out & see what it does....If it still shifts early....Lighter springs will obviously not fix it.
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Old 11-24-2020, 08:04 PM   #8
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Re: 2004R Calibration

Got a response back from Transgo. Their shift improver kits will not reprogram the shift points from what they were from the factory for a particular transmission calibration.
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Old 11-26-2020, 11:25 PM   #9
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Re: 2004R Calibration

You fine tune the shttps://www.summitracing.com/parts/bmm-20248?seid=srese1&gclid=Cj0KCQiAwf39BRCCARIsALXWETybJ6Kq0DmZRYNO_If2tg6iVz2nS-GNlknlnx5dHrRaSUrKpRfTuh4aAgMREALw_wcBhift points with one of these...
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Old 11-27-2020, 12:22 AM   #10
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Re: 2004R Calibration

B&M 20248 doesn't work on 200-4R governors.
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Old 11-27-2020, 03:05 PM   #11
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Re: 2004R Calibration

I sent my valve body and governor to Extreme Automatics. They set it all up and sent it back. I love how it works now, around $325 all said and done. This was on a low mile stock olds 88 2004r, now in my 68 with 4.11 gears and 275/60 rear tires. Definitely worth the money, no trial and error. I have buddy who did the governor weights and springs in his Monster 2004r that had the same low shift points and he had the pan off 5 or 6 until he liked it. Extreme was well worth it.
http://extremeautomatics.com/product...fromc=0&fromt=

Last edited by Tman; 11-27-2020 at 03:45 PM. Reason: Add link
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Old 11-27-2020, 08:31 PM   #12
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Re: 2004R Calibration

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Originally Posted by Tman View Post
I sent my valve body and governor to Extreme Automatics. They set it all up and sent it back. I love how it works now, around $325 all said and done. This was on a low mile stock olds 88 2004r, now in my 68 with 4.11 gears and 275/60 rear tires. Definitely worth the money, no trial and error. I have buddy who did the governor weights and springs in his Monster 2004r that had the same low shift points and he had the pan off 5 or 6 until he liked it. Extreme was well worth it.
http://extremeautomatics.com/product...fromc=0&fromt=
Thanks for the info. I have sent them an email and am looking into doing the same as you did.
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Old 11-28-2020, 01:42 AM   #13
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Re: 2004R Calibration

Quote:
Originally Posted by tdangle View Post
Thanks for the info. I have sent them an email and am looking into doing the same as you did.
Make sure to get the correct speedo gears in there at the same time, donít want to go in there again. My buddy also set up a delay relay in the lockup that slows 4th gear lockup that we both use, that is really nice too.
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Old 11-28-2020, 12:32 PM   #14
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Re: 2004R Calibration

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Originally Posted by Tman View Post
Make sure to get the correct speedo gears in there at the same time, donít want to go in there again. My buddy also set up a delay relay in the lockup that slows 4th gear lockup that we both use, that is really nice too.
I also have my lockup set up that way. Using a vac switch and electronic delay works well.
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