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Old October 13th, 2009, 08:20 AM   #1
silveranger93
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Default 46RE Problem

Thanks in advance for any help.

Truck: ’97 Ram 1500, 4x4, 360, 46RE

A few weeks ago I took the truck offroad and unfortunately dropped it in about a 4’ deep water hole. It filled the transmission with lots of nasty water and mud. After I got towed out the truck would creep forward in drive and that was it. I decided to replace the trans instead of trying to clean the old one out.

This past weekend I pulled a 46RE from a 4x4 ’99 Ram (it was a Cash for Clunkers truck). I installed it on Sunday and took it for a test drive. It drives perfectly normal except for the fact that it won’t downshift to first when I stop and attempt to accelerate. If I manually shift it to first then it will accelerate fine. It also had a CEL, which was “37 Governor Low Pressure Malfunction”. The scanner I was using showed that the governor pressure sensor was reading 5psi all the time with no fluctuations. So I pulled the GP sensor and solenoid out of my flooded transmission and installed them in the new trans (the old trans worked flawlessly until my stupidity flooded it). This had no effect whatsoever. I haven’t had a chance to get the scanner back on the truck yet to see if the reading had changed.

Any ideas?
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Old October 13th, 2009, 08:28 AM   #2
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Two things.

1. Did you flush out the trans cooler before running "new" trans?

2. Might have been the reason why they cash for clunkered it.
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Old October 13th, 2009, 08:31 AM   #3
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TCC Silonoid. (Tourque Converter Control) Little relay- looking thingy up behind the filter if you take the pan off and remove the filter. Some plug in and some have to be cut and spliced. (3 wires- piece of cake) You may be able to just take the one off your old tranny and instal it.
I'm sure a couple others on here will agree or maybe give you another suggestion as well... Give them a few hours so you have a list of things to check.
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Old October 13th, 2009, 08:37 AM   #4
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Quote:
Originally Posted by fatboy21 View Post
Two things.

1. Did you flush out the trans cooler before running "new" trans?

2. Might have been the reason why they cash for clunkered it.
1. Yes, it was flushed, to the best of my ability. The fluid and filter looked excellent when I dropped the pan to switch the governor pressure sensor and solenoid.

2. I certainly hope not, but you never know.
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Old October 13th, 2009, 01:03 PM   #5
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So I threw the scanner on it just now (with the governor pressure solenoid and sensor off my old trans) and now it reads proper governor pressures to a point. The actual matches the target value all the way up to 70 psi. When the target value exceeds 70 psi the actual just holds at 70 psi. What would cause low governor pressure?
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