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Remove Upshift MTV spring?

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9SECVSIX

Member
Joined
May 25, 2001
Messages
520
Art Carr shift kit here, says remove the MTV spring from the Upshift Valve assembly, what effect will this have :confused: I think I want my 400 back :(
Thanks
9sec.
 
if its a BRF it shouldn't have one in the first place... If its not a BRF take it out anyways... I believe all it does is slightly affect part throttle pressure/timing upshifts.
 
JDSfastGN

Your right, there's no spring in that port.
Have you tried to replace the wave plate in foreward with a flat steel :confused: I think it would be a good ideal to replace the apply bands in foreward and direct with billet ones, who supplies them :confused:
thanks
9sec.
 
9SECVSIX said:
Your right, there's no spring in that port.
Have you tried to replace the wave plate in foreward with a flat steel :confused: I think it would be a good ideal to replace the apply bands in foreward and direct with billet ones, who supplies them :confused:
thanks
9sec.


If by apply bands you are referring to the apply rings that snap into the bottom piston of the drums, I have replaced mine in the direct with a billet peice(it has a wide contact area the size of the steel rather than the thin area of the ring) that I purchased from Lee Thompson on the board (that is his screen name as well) I'm not sure if he still offers them or not, but its a very nice peice that was thinner and allowed me to fit an extra direct clutch without having to use thinner steels (i may have used one thinner but thats all) The Forward clutches are usually ok as long as the clearance and pressures are ok since they do not have to take an upshift load. About the wave plate, I don't use them, i just have a stash of different steels that I use to get the correct clearances (I like a .025-.035 in the forward and .040-.045 in the direct just for reference) If you don't already have it i recomend ordering one of CK performances manuals as they are very well done and have lots of other tips and hints to help them live. (dual feed the directs as well if a billet forward drum is being used) Any parts you may need otherwise should be available through CK, PTS etc... all are great to deal with. good luck.
 
Thanks JDSfastGN

good information, I have been away from 200's for a long time, lots of new development. I do have the CK manual and some billet parts, I want a 200 that will stand a few hi 9sec runs. I was refering to the apply rings, I think I can machine that piece myself. I will ditch the wave plate in foreward and replace it with a heavier steel (need a little more clearance there anyway). Souldn't hit to hard with a 9"CPT converter.
Was the piece you got from Lee made of steel or aluminum? you installed your first clutch on that custom plate, correct?

Thanks
9sec.
 
9SECVSIX said:
good information, I have been away from 200's for a long time, lots of new development. I do have the CK manual and some billet parts, I want a 200 that will stand a few hi 9sec runs. I was refering to the apply rings, I think I can machine that piece myself. I will ditch the wave plate in foreward and replace it with a heavier steel (need a little more clearance there anyway). Souldn't hit to hard with a 9"CPT converter.
Was the piece you got from Lee made of steel or aluminum? you installed your first clutch on that custom plate, correct?

Thanks
9sec.


Yeah i just stacked them up like usual, a steel on the bottom. It was an aluminum peice if i remember correctly. If going for 9s, i would probably get every billet peice available (not sure what you have already) but OD planetarys, planetary covers, and billet input shafts are probably a must along with the forward drum etc... to withstand that kinda power. Good luck with it. :cool:
 
the removal of the spring allows the shift delay oil that is controlled by the tv up valve to imediately have a positive force against gvenor oil and the shift valve spring at the valve as soon as 1 psi of oil exits the plunger into the tv upshift circuit.usually the spring will not let delay oil at low tv react on the shift valve until 15 psi of oil is exiting the tv plunger into the circuit.GET THIS NOW,OIL FROM THE PLUNGER IS NOT LINE PRESSURE .IT IS REGULATED DOWN FROM LINE TO 90 PSI AT THE TV LIMIT VALVE AND FED TO THE PLUNGER AT APPROXIMATELY 90 PSI REGARDLESS OF THROTTLE ANGLE.THE PLUNGER RE REGULATES THIS INTO THE TV UPSHIFT CIRCUIT FROM 0 PSI AT CLOSED THROTTLE TO 90 PSI AT WIDE OPEN.THIS OIL ALSO WORKS THE TV DOWNSHIFT AND BOOST CIRCUIT AS WELL. :)
 
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