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4r100 issues. How far should i go?

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  #16  
Old 09-12-2017, 10:41 AM
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You mentioned a low stall converter..... How low? I'll probably be going through the same ordeal you're going through very soon! Thanks
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  #17  
Old 09-12-2017, 11:51 PM
brandonrr brandonrr is offline
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According to the incredibly knowledgeable guy i talked to at ultimate transmission, the torque converter stall will be just slightly lower than the stock unit in a 6.0.

I previously had a 6.0 with the 5r110 and it seems like it had significantly less stall than the 7.3's 4r100 stock converter. Supposedly, it's only a few hundred rpm lower, but in a diesel, even 200rpm stall differance is very noticeable.

I spent about 2 hours talking with a couple of the guys at ultimate transmission before handing them the keys. They are the real deal if you are within reasonable driving distance of the Boise area. They specialise in diesel performance transmissions and have built many 1000+hp competition transmissions, including the 2008 winner of the diesel power challenge, as well as many more recent competitors. The 4r100 and mopar transmissions are their bread and butter.

One of their employees gave me a ride to work after dropping off my truck. His rig was a 676k mile 1st gen cummins with a stage 1 ultimate transmission and various power mods. I have never experienced such a 4 speed auto that shifted so beautifully. He told me the 4r100 has more potential than the early 90s dodge trans in his truck and if i was impressed with his truck's shifting, i will love the way my new built 4r100 will behave.

I'll report back when i get my truck back. I can't wait to actually hear the engine and not mostly the loud as hell torque converter. I was told I'll need custom tuning that leaves the transmission alone if i don't want rough, overly aggressive shifts. Stock would shift as wanted, but the increased line pressure in PHP's canned tuning would likely be too rough in the shifting. I had been running PHP's "daily" tunes to somewhat mask the increasingly worse slipping issues with my old transmission.

I should have my truck back in about a week.
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  #18  
Old 09-13-2017, 07:42 AM
Walleye Hunter Walleye Hunter is online now
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Quote:
Originally Posted by brandonrr View Post
According to the incredibly knowledgeable guy i talked to at ultimate transmission, the torque converter stall will be just slightly lower than the stock unit in a 6.0.

I previously had a 6.0 with the 5r110 and it seems like it had significantly less stall than the 7.3's 4r100 stock converter. Supposedly, it's only a few hundred rpm lower, but in a diesel, even 200rpm stall differance is very noticeable.

I spent about 2 hours talking with a couple of the guys at ultimate transmission before handing them the keys. They are the real deal if you are within reasonable driving distance of the Boise area. They specialise in diesel performance transmissions and have built many 1000+hp competition transmissions, including the 2008 winner of the diesel power challenge, as well as many more recent competitors. The 4r100 and mopar transmissions are their bread and butter.

One of their employees gave me a ride to work after dropping off my truck. His rig was a 676k mile 1st gen cummins with a stage 1 ultimate transmission and various power mods. I have never experienced such a 4 speed auto that shifted so beautifully. He told me the 4r100 has more potential than the early 90s dodge trans in his truck and if i was impressed with his truck's shifting, i will love the way my new built 4r100 will behave.

I'll report back when i get my truck back. I can't wait to actually hear the engine and not mostly the loud as hell torque converter. I was told I'll need custom tuning that leaves the transmission alone if i don't want rough, overly aggressive shifts. Stock would shift as wanted, but the increased line pressure in PHP's canned tuning would likely be too rough in the shifting. I had been running PHP's "daily" tunes to somewhat mask the increasingly worse slipping issues with my old transmission.

I should have my truck back in about a week.
I look forward to hearing your results.
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  #19  
Old 09-13-2017, 08:07 AM
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I too look forward to this. It sucks for me because my very expensive JW trans was never right and now I drive a manual, so I never got the feel of a good shifting E4OD or 4r100.
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  #20  
Old 09-13-2017, 08:20 AM
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Thank you for the reply, it is very helpful. I look forward to hearing how your new 4R100 turns out. I can't come to Illinois, I'm in SE Virginia, but at least I know what to be looking for. Thanks again!


Mark
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