Hi Guys...came over here from Nastyz28 forum because you all are the experts on the 200-4R.
Two issues I need input on:
1. Sometimes I get an intermittent 2nd gear start. I suspected a pressure issue so I reinstalled the pressure gauge I used when I first set the TV cable up. The O and D pressures at idle are 80 psi with immediate increase when throttle is depressed. TV cable is setup correctly...has geometry correction Tru-Shift system from Bowler Transmissions and TV valve travel confirmed correct when pan was off. So...normally when I stop at a light, the pressure drops to 80 psi, but when I get the second gear starts, I noticed the pressure gets "stuck" between 100-110 psi and when that happens it wont drop till I shift either to neutral and back to overdrive, or I shift to low gear and back to overdrive. Once I do that, pressure goes back to 80 and I can go days or weeks without a second gear start. Its pretty infrequent. It has been there since day one and frequency has not gotten worse. What typically causes this?
2. The transmission downshifts semi-harsh from 3rd to 2nd. Its not really a clunk, but you can certainly tell when it changes gears. Ujoints and rear diff are all solid so no issues there. Its been doing that since I installed it 2 years ago. A few guys have told me that is normal with a performance built transmission, but I wondered if they left the cushion spring out of the servo when it was built. From what I have read though, if that was the case it would be much harsher than it is. It has the heavy duty servo...looks to be a billet one. I don't know the brand. I was going to pull the servo and look, but I don't have enough room due to the tunnel and really don't feel its enough of an issue to warrant dropping the tranny. Plus, I'm no transmission expert so I am going to leave it alone. Is it actually the servo that causes the downshift or some other component? Is a semi-harsh downshift common on these?
Thanks for taking the time to read and reply.
Background in case you need more information; I bought the transmission form another NastyZ member who had it in a 73 Camaro behind a 595 HP 383 stroker. It had 3000 miles on the build. He sold it to switch to a Tremec. It now lives behind my 360 hp SBC. I am using a Precision Industries lockup converter. I had the converter rebuilt, reflashed to 2500-2600 and lock up clutch replaced. I have put over 5000 miles on the system since I bought it and it works great with minor exceptions noted above. The parts list shows the same parts you would see from a stage 3 build from Extreme Transmissions. Upshifts are firm and tight, no slippage, fluid and filter changes have revealed all is well, nice and red, no burnt smells. I run Amsoil ATF as did the previous owner.
Two issues I need input on:
1. Sometimes I get an intermittent 2nd gear start. I suspected a pressure issue so I reinstalled the pressure gauge I used when I first set the TV cable up. The O and D pressures at idle are 80 psi with immediate increase when throttle is depressed. TV cable is setup correctly...has geometry correction Tru-Shift system from Bowler Transmissions and TV valve travel confirmed correct when pan was off. So...normally when I stop at a light, the pressure drops to 80 psi, but when I get the second gear starts, I noticed the pressure gets "stuck" between 100-110 psi and when that happens it wont drop till I shift either to neutral and back to overdrive, or I shift to low gear and back to overdrive. Once I do that, pressure goes back to 80 and I can go days or weeks without a second gear start. Its pretty infrequent. It has been there since day one and frequency has not gotten worse. What typically causes this?
2. The transmission downshifts semi-harsh from 3rd to 2nd. Its not really a clunk, but you can certainly tell when it changes gears. Ujoints and rear diff are all solid so no issues there. Its been doing that since I installed it 2 years ago. A few guys have told me that is normal with a performance built transmission, but I wondered if they left the cushion spring out of the servo when it was built. From what I have read though, if that was the case it would be much harsher than it is. It has the heavy duty servo...looks to be a billet one. I don't know the brand. I was going to pull the servo and look, but I don't have enough room due to the tunnel and really don't feel its enough of an issue to warrant dropping the tranny. Plus, I'm no transmission expert so I am going to leave it alone. Is it actually the servo that causes the downshift or some other component? Is a semi-harsh downshift common on these?
Thanks for taking the time to read and reply.
Background in case you need more information; I bought the transmission form another NastyZ member who had it in a 73 Camaro behind a 595 HP 383 stroker. It had 3000 miles on the build. He sold it to switch to a Tremec. It now lives behind my 360 hp SBC. I am using a Precision Industries lockup converter. I had the converter rebuilt, reflashed to 2500-2600 and lock up clutch replaced. I have put over 5000 miles on the system since I bought it and it works great with minor exceptions noted above. The parts list shows the same parts you would see from a stage 3 build from Extreme Transmissions. Upshifts are firm and tight, no slippage, fluid and filter changes have revealed all is well, nice and red, no burnt smells. I run Amsoil ATF as did the previous owner.