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Trans works great we installed it last week and have been test driving it evert day. Again thank you Rracing for youre help.:driver:

Thats what happend to my 7155 I had to rebiuld the manifold. I went to the local cat dealer and they printed me out a manual all the o rings are still available threw cat. With the help of Rracing on here i was able to rebuild it. Definetly leave the oiler on there.:driver:

Ok so i tested the rear clutch pressure and it was on the money threw all the gears going by the manual. I did also notice that the number 10 vent was removed and there was a pipe plug in its place i believe its for the rear clutch i removed it and the pressures are all the same. Also i uncoverd...

I will be testing the presure at that port today. I was able to find how to test it in the manual after reading youre post. I did replace all the orings in the accuators and the ones on top of the popits. I have went to the local heavy duty parts place bought a filter and oil mister. Thanks again

Thank you RRacing that puts me in the right direction i really want this trans to work correctly the guys at work told me to put a fuller 13speed in it if cat wont fix it. lmao now that i have the trans out they have nicnamed it the beast. We have done transmtions b4 but this is like nothing...

I removed the trans from the truck. I did replace all the orings in the piston acuators including the spring loaded ones. I tested it by puting it back on the trans hooking up a regulator and a air line aswell as the shifter and set the reg to 100 lbs. The only thing i did not replace in the...

Hi guys i just rebuilt my first cat 7155 manifold found nothing wrong with it but alittle muk in it but i replaced all the orings and cleaned it up bench testing it works fine any sugestions b4 i put the trans back in. I live in upstate ny and no one up here works on these that i can find.