ok here it is i built an 86 700r4 for a friends truck when he put it back in it ran fine but than relized it had a cracked case, so he got me another trans but it was not the same exact inside it had a pipe running from the pump to another rectangular box on top of the VB spacer plate.(also had a checkball in the case) Anyways i removed everything from the 1 transmission and installed all the good new stuff from the 1 with the cracked case to the other. We put it in the truck and now i dunno what happened??? It has NO idea what gear its in at all has no reverse escept when i first started it up, and neutral is drive slips in OD and D and shakes the hell out of the truck ( what inside a trans would shake a vehicle???) however if you put it in 1st it goes fine manually shift to second it shifts beautiful than starts to slip and all kinds of bad things. Is their a totally different routing of fluid in different 700s i used EVERYTHING from the original good unit except the case? The input shafts were the same splines so its not a new new unit. I dunno please help if you can. Maybe i messed something up ? any help will do. Thanks