94 Jmod acting up

dnsherrill

Registered
Need transmission help. 94 mark VIII, 91k miles
After finishing Jmod on the 94 it's slow to initiate Reverse (engages at about 1700-2000 rpms) then shudders while driving in reverse. I drilled all the holes except the one to speed up R (hole #10 at bottom right)
It is a little slow to engage Drive (grabs at about 1200 rpms) but it goes through all the gears fine, no issues cycling through the gears, no shudders or slippage...shifts hard..
About 11 qts came out, I added a cooler and a deep sump pan with drain plug, about 13.25 qts Mercon V have gone back in...reads high on the dipstick, I may need to drain some
----
the valve body has 8 rounded corners for the balls, but there were 9 removed, one was in a location that was not a round corner, I think it was put in by mistake at the factory? I only put 8 back in. When the valve body came down from the trans, a small shiny ferrule dropped to the ground, it's about 2-3mm i.d., maybe 4-5 mm long. I didn't know where it came from, so left it out. The screen that sits in at an angle went back in
---the 9th ball and mystery sleeve
View attachment 12900
 
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