I adjusted the TV cable as said by everyone here. Now it shifts around 2500 rpm in first and then jumps into second pretty hard....is this right? I pulled the housing back and it clicked a few times...should I set it back a little? The shifts are allot firmer though.

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1987 Camaro Iroc Z
T-Tops
Maui Medium Blue
350 TPI
TH-700R-4 Tranny

"Better to look at it than to look for it "

 

I can't give you a really good shift point off the top of my head, however CHP (Chevy High Performance) has been doing articles on late model F-Bodies and they have gotten a mostly stock 5.7 L TPI engine (with corvette heads) they went through the all the little modifications needed to make the 3,000 lb car get to the 12’s and that included valuable info on shift points. I think they where between 5,000 and 5,700 for automatics.

Not sure though I will get the exact answer later today.

 

5500 for all 350 motors and 5000 or 5500 for 305's depending on which one you have. that is where they redline, revving a tpi motor any more than that is usless cause they quit breathing at about 4500 rpm anyway

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86 IROC-Z
305 TPI
700R4 W/ shift kit
3.23 gears
T-Tops
maroon with gold stickers and rims/ black interior
43,000 miles
flowmaster exhaust, edelbrock headers, gutted airbox, converter, and MAF, K&N filters.

soon to come are 3.73 gears and subframe connecters.

 

My first thought is that you were talking about shift points under normal driving. Shift points in general change with throttle position, at minimum throttle mine shifts at 2100rpms. Shift points vary between specific transmission calibrations, a shift kit usually will alter shift points also.

 

Yeah I was talking about general drivign..not WOT. Mine changes now a little to late (somewhere around 2900-3200). I am going to adjust it back a little to move the shift point down to around 2000-2100. Before it was shifting way to early, like 1200-1500.

Thanks

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1987 Camaro Iroc Z
T-Tops
Maui Medium Blue
350 TPI
TH-700R-4 Tranny

"Better to look at it than to look for it "

 

Just so you know, the TV setting isn't like dialing in a radio station. there is the correct setting and then there is everything else. If you have late shifts with the correct setting then you have A)The wrong governor B)The wrong TV geometry C)THe wrong VB calibration.

 

Ok, so what your saying is that if I follow your procedure and pull that housing back as far as it goes (with the throttle wide open) it should be set correctly?

Maybe it is correct..I dunno! I am new to these engine/tranny's

What I did was followed the instructions, before I did this the tranny shifted too early (or at least I thought it was) it shifting at 1200 or so. After I did this the tranny shifts later.. like at 2300 at normal acceleration. My question is how it changes...she kind of jumps into 2nd (actually if I get hard on the gas she will actually chirp the tires).. is this normal?

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1987 Camaro Iroc Z
T-Tops
Maui Medium Blue
350 TPI
TH-700R-4 Tranny

"Better to look at it than to look for it "

 

i don't know how u set the TV cable but the proper way to set it is to push the adjustment tab in and pull the cable back all the way, release the tab, then rotate the throttle all the way froward. the cable should click out a few clicks. then that is it, that is the correct setting. i fine tune mine to where i want it by moving it a few teeth one way or the other, but if you move it very far out of where it is supposed to be, it could mess up the tranny.

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86 IROC-Z
305 TPI
700R4 W/ shift kit
3.23 gears
T-Tops
maroon with gold stickers and rims/ black interior
43,000 miles
flowmaster exhaust, edelbrock headers, gutted airbox, converter, and MAF, K&N filters.

soon to come are 3.73 gears and subframe connecters.

 

Just make sure it makes the 2-3 shift before 5000 rpm.

 

This is the method: To adjust the TV Cable skip the book method and do this: Press the D button on the adjuster and loosen the cable setting. Now, have someone floor the gas pedal while you check to see if the throttle plate is open all the way. Usually they are off a little and will wiggle. Do whatever you have to do to get it open solid. Now, with the pedal still floored, press the D button and pull the cable casing (the black tube) back as hard as you can and release the button. You now have the engine, tranny and gas pedal all in sync at WOT. Mark the cable so if for some reason it gets moved you can know where to put it again. The problem with the 'self adjust method' is that it bends things and puts them permanently out of whack. It is also the full TV setting, which is theoretically what the GM method does.

As for having the 2-3 shift before 5000 RPM that depends on what the calibration is. My Camaro has it at 5500 RPM while my old Firebird 305 was 4500 RPM.

 

I was looking at his engine setup and with a stock tpi staying under 5000 rpm in 2nd is probably a good rule of thumb to get the best et. My tranny was shifting too slow and finally shifted at 5200 and I could feel the loss of power. I had a corvette servo put in and everything adjusted right and then it shifted at about 4800 rpm and et's improved.

 

You have just proved an excellent point. If you are not using the power band you are not getting the most out of your engine. This includes having too much stall as well as not enough. It includes having the wrong gear ratio for your setup AND it includes having shift points that are not correct for your combo. You don't hear about this part of it too much but many people want later shifts than the engines power band wants.

Just remember that you don't change WOT shift points with the TV Cable. That is the Governors job.



[This message has been edited by transfixleo (edited August 30, 2001).]

 

So how do you go about making the trans shift at 5000 instead of 3600 when you pull the lever into manual low? When it gets to 3600 it shifts with the lever still in the low position.
TIA

 

You will need the TransGo Reprogramming Kit for that. BY the way, I have never seen one that would shift up at that low of a speed. What is your combo? What are the WOT shift points W/O using the shifter? Have you set the TV as I specified previously?