4l80e converter slippage issues
Thread Starter
Staging Lane
Joined: Jul 2008
Posts: 50
Likes: 0
From: canada brandon
4l80e converter slippage issues I have about 22% slippage on my converter. This is my second converter with the same issue. The current converter is from circle D and I really do not think there is anything wrong with the converter. I have verified by input shaft speed and fluid smell that the clutch's are ok. Can this be caused by a fluid flow to converter issue? like maby a converter flow control valve or a plugged transmission cooler?
Thread Starter
Staging Lane
Joined: Jul 2008
Posts: 50
Likes: 0
From: canada brandon
Slippage is converter unlocked. Speed is 115mph, rpm is 6200. Rear gear is 3.5. Tire heigh is 28". Thats at 15 pounds boost. Max is 17. I was going to call you guys but I thought maby I should check my flow control valve in the pump for the converter and flow test my cooler first. I can hardly see it doing that but I do not have alot of experience with transmissions. I fix maby 1 a year where I work. I tried running it at 6 pounds of boost and the slip is then ok at 7%. Maby the engine is just making more power then I figured. Would it be a big deal to tighten it up? Also I was going to data log the trans brake rpm but It feels like its hitting around 5300 rpm which seams to close to my 6500 rpm shift point.
