Govenor Pressure Conversion

[DogramTD]

WHat are the benefits of the Governor Pressure Conversion Upgrade Kit

(Part No. 618-GK) for the 48RE and is the cost to benefit worthwhile? What types of problems are we solving by installing it?

 

[cerberusiam]

Ask yourself this: if it fixes the shuttle shift problem, 2nd gear starts, gear hangs until high rpm is it worth the cost?



This kit consists of a new governor housing and a heavier larger solenoid use din the GM 4L80E tranmissions to control governor pressure. The OE Dodge solenoid is much smaller in the surface area exposed to control pressure and when any sludge buiold sit gets much smaller. The armature and coil on the OE one is a lot smaller and tends to weaken over time.



With the propensity of the stock 48RE to make metal filings and create sludge, the OE soelnoid suffers. It simply won't work if things are a little to dirty and it weakens way too fast. After about 40k the OE solenoid just gets weak and quits working correctly.



The GM solenoid is built heavier and will take a lot more trash before its functions are affected. Unfortunately, the pressure transducer is frequently part of the problem as it provides feed back to the ECU about what pressure is set. It doesn't matter if the solenoid works perfectly and the transducer reports false values, the trans still does not function correctly.



The other positive to the GM solenoid is it will take more pressure and still function in performance environment. Some VB builds will allow line pressure to flood the gov circuit, either by design or fault, and that will just stoip the OE solenoid form working correctly. Thats when you get gear hangs and no shifts. The GM slenoid was originalyl adapted to stop this in certian builds, and, later it was found to actually benfit other areas.



Borg Warner has released a new solenoid that is about 30% stronger in the electrical portion that is an ateempt to to fix the problem. The positive side is it will fit the OE gov housing with no mods. The GM solenoid needs the new housing to work.



Peopel I have talked to are using the new BW solenoid with good results. No good info on whether it will last longer than the OE yet. I am using this kit form Suncoast. Works perfectly. Took a trans that was shuttle shifting intermittently, hanging shifts, etc, and it is dead perfect and working better than new. Both options will work, the question is how long?



Either one of these solenoids plus advancing the TTVA motor, or TV cable, seems to be the ticket to solve the most annoying issues with the 48RE sans tearing it apart and making major changes.