Built 4l60e Popping out of gear under any load.
#1
Built 4l60e Popping out of gear under any load.
So I have a 99 Z28 with a built 4l60e (I won't name who) since the person I bought the car from is a fabricator at the establishment but they are a very well known Auto Tranny Builder on here. Anyways the car makes under 400rwhp with a revmax 4200 stall. I went to see what the car would run at the track tonight and the car keeps popping out of gear it seems like and free revs until I put it frm neutral back in to drive. At first is was 2-3 shift would make it free rev (pop out of gear) but then I tried loading the converter from a stop and launching it and the car popped out of gear in first at around 3-4k rpm way before rev limiter. now it seems to do it in any gear if there is enough load or at WOT at all. I thought maybe low tranny fluid. added some more fluid, checked the levels and it still does it, Prob even worse now.
#4
I would suggest adding about a 1/2 quart of fluid and see what that does. Otherwise maybe the input sprag is letting go but description is kinda vague.
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#5
Thats exactlt what i did performabuilt. It didnt get any better but now i have no third or fourth gear at all. It feels like irs barely scraping the gear and not actually engaging all the way. I am seriously considering going with performabuilt tranny though if i cant get this tranny to work. Its sad because i know it has a LOT of the good parts already in the tranny. Supposedly rated at 600rwhp
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#8
Certainly sounds like a mechanical failure at this point possibly multiple.
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#9
The trans is not popping out of gear, i do not think that is possible. Low pressure with a big stall will make it "feel" like it is not in gear. I am guessing it was ran hard with not enough fluid and took the clutches out.