Help with P0753 limp mode
Legend
Joined: Nov 2014
Posts: 8,098
Likes: 318
That would be much appreciated. I'm sure I would've figured it out since I've built numerous motors and replaced transmissions among droves of other repairs over my life but a specific video would definitely make it even simpler when I get the money and also help identify what tools I'll need to get if I don't have all the right ones. Still recovering from losing everything I owned for the fourth time in life.
Legend
Joined: Nov 2014
Posts: 8,098
Likes: 318
Professional
Joined: Oct 2018
Posts: 121
Likes: 0
From: Florida
I could use that video myself moparfanatic! I plan on replacing my filter and fluid as well because I don’t know when it’s been done last. I also need to drop my drive shaft to replace the rear output shaft seal which I know I will be leaking atf +4 anyway so might as well do it then.
Veteran
Joined: Jan 2017
Posts: 476
Likes: 41
From: Imperial Beach CA
Some need knowledge here, can it be driven with the 8 pin plug off? You won't have OD, but for around town it wouldn't matter. Out on the highway it's a 3 speed, but cars ran 3 speed auto trans for a long time with no OD. Waste a little more gas. The VW bug had a manual shift 3 speed auto back in the day.
Administrator
Joined: Apr 2010
Posts: 87,548
Likes: 4,230
From: Clayton MI
Some need knowledge here, can it be driven with the 8 pin plug off? You won't have OD, but for around town it wouldn't matter. Out on the highway it's a 3 speed, but cars ran 3 speed auto trans for a long time with no OD. Waste a little more gas. The VW bug had a manual shift 3 speed auto back in the day.
Registered User
Joined: Jul 2024
Posts: 1
Likes: 0
P0753 and P1765 codes are showing seems to be in limp mode not shifting correctly
Does anyone know Hydrashocker's test of pulling the 8 pin connector I've seen him say to test if it is an electronic or mechanical problem?
"There is a way to see if your issue is electrical or mechanical on your transmission 42-44RE. Testing instructions for 42RE, 44RE, 46RE, 47RE.
By doing this you will not have an automatic transmission, you will have to shift it completely manual and you will have no Overdrive!
Get under truck on the drivers side and unplug the 8 pin harness from the transmission near the linkage input into the trans, (this is the main plug to the transmission). Start your truck and back out or what not. Now drop the gear shift selector without stopping all the way down from reverse (or Park) to 1st and hit the gas. You should be going now running in first gear. Now shift with the selector to 2nd gear, then into Drive. If everything shifts fine then your issue is electronic, if it shifts the same then it is mechanical.
If the problem is electric:
1. Replace the Output Transmission Speed Sensor.
2. Check the 8 pin harness you disconnected for corrosion.
3. Replace the 3-4 shift solenoid."
I am wondering if anyone knows if pulling the trans control relay in the junction block would accomplish the same thing.
I've also read on here that if the problem is electrical that the relay can be jumped to bypass it as a semi permanent fix until it can be fixed.
Really hope someone is on since I kinda need an answer now.
"There is a way to see if your issue is electrical or mechanical on your transmission 42-44RE. Testing instructions for 42RE, 44RE, 46RE, 47RE.
By doing this you will not have an automatic transmission, you will have to shift it completely manual and you will have no Overdrive!
Get under truck on the drivers side and unplug the 8 pin harness from the transmission near the linkage input into the trans, (this is the main plug to the transmission). Start your truck and back out or what not. Now drop the gear shift selector without stopping all the way down from reverse (or Park) to 1st and hit the gas. You should be going now running in first gear. Now shift with the selector to 2nd gear, then into Drive. If everything shifts fine then your issue is electronic, if it shifts the same then it is mechanical.
If the problem is electric:
1. Replace the Output Transmission Speed Sensor.
2. Check the 8 pin harness you disconnected for corrosion.
3. Replace the 3-4 shift solenoid."
I am wondering if anyone knows if pulling the trans control relay in the junction block would accomplish the same thing.
I've also read on here that if the problem is electrical that the relay can be jumped to bypass it as a semi permanent fix until it can be fixed.
Really hope someone is on since I kinda need an answer now.
