Tranny problems

[325issguy]

Hey everyone,
Just got my m52 swap rolling today. I am having one problem. The car seems to hop out of second when accelerating any more than like a grandma.

The transmission is a zf that came out of my swap car that got rear-ended. It popped out of second a couple of times over the year or so I owned it but nothing like this, I just changed the fluid with half redline D4 ATF and half redline 75w140ns. I always attributed it popping out to driver error. What is the best fluid for a struggling transmission?

My question is is this more than likely an internal problem that somehow surfaced over the last month or two of not driving the car, or if I must just not have everything lined up properly. It seems unlikely that second gear went out in the time since the car was in an accident.

Thanks,
Chris

[619E30]

I use BG products. I recommend it to all my customers. 2 of my customers had shifting products, so I added some of BG's product and it worked! I was kinda skeptical about the product because it was just fluid, but it works

[325issguy]

Also, could this problem be caused by the clutch possibly having air in the system. I am pretty sure I got it all out but not positive being I did it manually.