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Old 06-26-2021, 11:42 AM   #1
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Replace ECM & TCM

Want to replace ECM and TCM on my 2003 Dolphin 8.1 Workhorse. Has anyone here installed Brazels Ultrapower TCM and ECM? How difficult is the removal and install? Does the doghouse have to be removed? The front hood opening is small. Can I remove the hood door and get to the TCM and ECM? If so , how to remove the hood door? Thanks for any help.

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Old 06-26-2021, 09:57 PM   #2
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Hoping you get some responses as these are an upgrade I've considered too.
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Old 06-27-2021, 09:02 AM   #3
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I went to their website and assuming that yours is the same as the precedure for a W22, both the ECM and TCM are reachable with the dog house removed. Some Improved performance can be achieved with tuning however it must be mentioned that without better air intake and exhaust flow your results may be limited. Headers and a bigger/ better air cleaner would be helpful in addition to tuning. Transmission updates would be modified shift timing, TCC engagement and line pressure for more positive shifts through TCM replacement.
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Old 06-27-2021, 11:58 AM   #4
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A local Workhorse shop is going to install the TCM and ECM for me. Estimate is 1 or 2 labor hours. After the install is complete I will update this thread with any further info. Will be taking a long trip later this year, It will be a good test for the upgrades...Thanks
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Old 06-27-2021, 02:27 PM   #5
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2005 Seabreeze LX 8321, I did the ultrarv (brazels) ecm/tcm 2 years ago. Easy install, remove doghouse, open hood, at most 2 easy hours. Better performance, and I like the shift points. I live and drive in CO, it has improved mountain performance, not a huge amount, but noticible and worthwhile.
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Old 10-31-2021, 09:41 AM   #6
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Took a short trip with my Dolphin late September, Increase in power and a better shift pattern is noticeable. My investment in the Ultra Power TCM and ECM is worth it. Most of my travel is in the Rocky Mountain west and the increase in power of my 8.1 is beneficial.
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Old 11-01-2021, 11:14 AM   #7
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I replaced the ecm/tcm several years back with the UltraRV product. 2005 Seabreeze 8.1. as i recall, it was relatively easy, I did it in conjunction with other work so a little fuzzy on the time to replace, but no more than 2 hours. had to pull the doghouse, and some work thru the hood, I just followed the instructions sent with it.

I also replaced the maf after UltraRV looked at the obdi data. I had been cleaning it but it was still reading lower than it should.

I like the performance improvement, better acceleration, maybe better fuel economy, I can get it to shift into 6th gear, and stay there at 50 mph. (depending on hills, wind, etc.) .

Prior to the change it seemed that the engine/trans would be hunting for the right gear on the highway, and I would drive faster to keep it in a gear, now I set cruise control at 62/63 and roll along. In hilly/windy conditions, I will kill cruise and do my best to keep it in the highest gear possible and live with more speed variation.

I would do it again as I feel it was worth it, sorry I can not be more specific.
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