- Joined
- Jul 20, 2004
- Threads
- 274
- Messages
- 23,233
- Location
- Chandler, AZ
- Website
- www.tontorecreationalliance.org
IMHO the auto trans is tuned more on the smooth shift side than I prefer. As lift, weight, larger tires, etc, have been added, it has moved more towards a slip shift end of performance. So, did a bunch of reading, talked to a trans tech buddy and have tried a few tweaks with good results. Wasn’t comfortable posting until I had some trail days on it, over the holidays ran 7 days and 287 trail miles and very happy with the improvement.
The disclaimer: I’m not a trans expert, so try at your own risk. I have only researched the A343F, this probably wont work on the earlier transmissions?
System line pressure has a direct effect on the holding force of the clutches and brakes. Lower line pressure makes for smoother shifts by allowing more slip, more slip increases wear and running temps. Higher pressure makes for firmer shifts, less slip, wear and IMHO better trail feel/response.
There are two relatively easy adjustments that change the line pressure, first the primary regulator valve. Its job is to regulate the main pump output. It is in the lower valve body, so requires removing the pan.
The disclaimer: I’m not a trans expert, so try at your own risk. I have only researched the A343F, this probably wont work on the earlier transmissions?
System line pressure has a direct effect on the holding force of the clutches and brakes. Lower line pressure makes for smoother shifts by allowing more slip, more slip increases wear and running temps. Higher pressure makes for firmer shifts, less slip, wear and IMHO better trail feel/response.
There are two relatively easy adjustments that change the line pressure, first the primary regulator valve. Its job is to regulate the main pump output. It is in the lower valve body, so requires removing the pan.