7.3 cut out while driving won't restart
- Thread starter mustube
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mustube
New member
My truck holds the power fine in gear, but doesn't shift very well. I think it has more to do with the tires than the power. I have broken 2 shafts but that was because of a bad rebuild, both times was on the 2-3 shift at very light throttle. 38r is on the list, I just need to stop spending money on offroad toys.
I think these injectors with a 38r or similar BW turbo would be the perfect 7.3 truck.
I think these injectors with a 38r or similar BW turbo would be the perfect 7.3 truck.
People say that about the 238/80-38r-and built trans combo too!
You have 37s. I had a lot of shifting issues at that size and until my speedo and other things were corrected it was a beotch. If I went bigger than a 35 again, which I wont, id definitely be looking for 4.10s.
mustube
New member
Yeah but I feel like with 175s you can get away with an otherwise stock truck and be fine. Especially with a PMR motor. You get into 2xx injectors and you have to start wondering when you will lose a rod if you really drive it. I just want a solid DD and don't really want to swap in a forged motor for piece of mind, or buy a built trans. With 175s, a healthy trans/converter/valve body, and maybe a turbo and you should be set.
I'll get my truck reprogrammed but the issue I'm running into is the stock abs computer won't go past 35s and the speedometer fixes you can buy only fix the speedo, not what the computer sees. Gears help for sure but they don't fix the speedo since the sensor reads off the ring gear instead of in front of the pinion.
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I'll get my truck reprogrammed but the issue I'm running into is the stock abs computer won't go past 35s and the speedometer fixes you can buy only fix the speedo, not what the computer sees. Gears help for sure but they don't fix the speedo since the sensor reads off the ring gear instead of in front of the pinion.
Sent from my XT1058 using Tapatalk
mustube
New member
Anybody in Austin, Texas have AE and know how to change the tire size? I'll buy some beer or something.
It sort of works out those as if you go over 35 up to say 37-40+ you are likley going to do a gear change which will then bring the correction back into the range of the tire change scope in the PCM program. When I finally get my 40s in the garage mounted with the 4.56s I will actually need to reduce tire size from stock to get speedo perfect as I will be a little lower in final gearing at the axle rotation. Using the speedo gear cal on the forum is helpful for figuring out size to match same speed. which you can then used to adjust the PCM tire calibration setting.
If someone needs help with the AE tire size calibration setting here is step by step with pictures and everything. If you do not know it can have you scratching your head for quite some time unless you start fiddling. This will save you the headache hopefully:
If someone needs help with the AE tire size calibration setting here is step by step with pictures and everything. If you do not know it can have you scratching your head for quite some time unless you start fiddling. This will save you the headache hopefully:
Last edited:
mustube
New member
Gear swaps don't change the speedo because the speedo only counts ring gear rotations, not driveshaft rotations. I guess programming my truck for 35s is going to be as good as it gets.
Have you tried it before accepting that it simply wont work?
mustube
New member
It is axle shaft and hub rotation, but if you think about it, tires will change how fast the ring gear turns vs. vehicle speed, but a gear change won't, it will only change drive shaft speed vs. ring gear speed. Gear swaps will definitely change rpm vs. speed but not what the computer sees from the VSS.
mustube
New member
The ABS computer won't let you go further than 35s.
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