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.

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/

Re: 2004R Calibration
 

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

Re: 2004R Calibration
 

I like the lighter springs idea in the last link.

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.

Re: 2004R Calibration
 

https://transgo.com/product-details/sk-200-4r/
They say their kit fixes late or early shifts.

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.

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.

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...

Re: 2004R Calibration
 

B&M 20248 doesn't work on 200-4R governors.

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=

Re: 2004R Calibration
 

Thanks for the info. I have sent them an email and am looking into doing the same as you did.

Re: 2004R Calibration
 

Make sure to get the correct speedo gears in there at the same time, don’t 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.

Re: 2004R Calibration
 

I also have my lockup set up that way. Using a vac switch and electronic delay works well.