Another transmission question...

Paul Merolla · 12-05-2009, 11:18 AM

Quote:

Originally Posted by tranzbuilder

I was curious which upshifts are to early wot only or light throttle or mid throttle. there is many ways to change all of them depending gear ratio, tire size, geometry at the carb center to center distance from throttle shaft to cable stud. most good transmission shops should have asked you those questions before building the unit ! also curious about the statement the other gentlemen said about NEVER using TRANSgo products in 2004r or 700r4's what inside those kit's causes the worst line rise ever? thank's for listening

Light throttle, as in every time I stop for a light and take off again. It was an ebay purchase, not a trans built for me. I should also say that I've been very happy with the trans all in all...when I take it to the track and shift it manually, it works well and shifts are firm enough to break the tires loose. (no slicks...8.2" 10 bolt time bomb)

tranzbuilder · 12-05-2009, 06:41 PM

If your only problem is light throttle upshifts corvette govenor will not fix that problem. What carb do you have on the car? should be able to fix your problem pretty easily with lengthening the center to center distance from throttle shaft to the cable stud. it's just a matter of correcting the goemetry at the carb to match factory linkage inside the transmission.

Alan Roehrich · 12-05-2009, 07:31 PM

Paul, that's a lack of line pressure rise. If you'll get the pressure regulator spring and those two valves I told you about, that will fix a lot of that. Get the two biggest valves TCI makes, you can pick them up cheap at Jeg's or Summit. A transmission parts house will have a Superior valve body kit. Outside of that, you'll need a pan gasket, a filter, some Vaseline, and some fluid. You do not even have to drop the valve body. Everything you need to work on is behind a snap ring in the pump.

If you have a Holley carburetor, you may want to pick up the piece they make to go on it to improve the geometry for the cable.

Paul Merolla · 12-06-2009, 02:23 AM

Guys....the carb is a 4779 Holley. TV cable, as stated, is a Lokar. Brackets are homegrown. Sounds like we're on to something here... "I'm a roast...baste me." - Dennis Miller, in the film, Joe Dirt.

ss3011 · 12-06-2009, 03:04 AM

The TV cable geometry is critical. The lever needs to pull the cable 1.375 " , from 0 to WOT . That is the first step in setting up a new transmission. You should be able to set the cable by resetting the adjuster, then opening the carburator to WOT, and getting at least 1 click out of the adjuster. The lower mph shift points are controlled by the Valve body in conjunction with the large governor weights. The lighter the weight the more delayed the upshift point. Small steps are better.

12-05-2009, 06:41 PM	#2
tranzbuilder Junior Member Join Date: Jan 2008 Posts: 18 Likes: 0 Liked 1 Time in 1 Post	Re: Another transmission question... If your only problem is light throttle upshifts corvette govenor will not fix that problem. What carb do you have on the car? should be able to fix your problem pretty easily with lengthening the center to center distance from throttle shaft to the cable stud. it's just a matter of correcting the goemetry at the carb to match factory linkage inside the transmission.

12-05-2009, 07:31 PM	#3
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,138 Likes: 1,617 Liked 1,929 Times in 434 Posts	Re: Another transmission question... Paul, that's a lack of line pressure rise. If you'll get the pressure regulator spring and those two valves I told you about, that will fix a lot of that. Get the two biggest valves TCI makes, you can pick them up cheap at Jeg's or Summit. A transmission parts house will have a Superior valve body kit. Outside of that, you'll need a pan gasket, a filter, some Vaseline, and some fluid. You do not even have to drop the valve body. Everything you need to work on is behind a snap ring in the pump. If you have a Holley carburetor, you may want to pick up the piece they make to go on it to improve the geometry for the cable. __________________ Alan Roehrich 212A G/S

12-06-2009, 02:23 AM	#4
Paul Merolla Senior Member Join Date: Dec 2001 Location: Papillion, NE Posts: 612 Likes: 246 Liked 293 Times in 65 Posts	Re: Another transmission question... Guys....the carb is a 4779 Holley. TV cable, as stated, is a Lokar. Brackets are homegrown. Sounds like we're on to something here... "I'm a roast...baste me." - Dennis Miller, in the film, Joe Dirt.

12-06-2009, 03:04 AM	#5
ss3011 Senior Member Join Date: Feb 2002 Location: Southeast Michigan Posts: 910 Likes: 70 Liked 239 Times in 114 Posts	Re: Another transmission question... The TV cable geometry is critical. The lever needs to pull the cable 1.375 " , from 0 to WOT . That is the first step in setting up a new transmission. You should be able to set the cable by resetting the adjuster, then opening the carburator to WOT, and getting at least 1 click out of the adjuster. The lower mph shift points are controlled by the Valve body in conjunction with the large governor weights. The lighter the weight the more delayed the upshift point. Small steps are better.