th700r4 no go

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th700r4 no go

Postby erik monza » Mon Dec 21, 2015 6:12 pm

Please help

I am lazy and have no time, so I only want to do the work ones

I am redoing my 1976 monza, with a 305 TPI and a th700r4.

So one of the jobs was to get a th700r4 and hand it to a trans guy to check it out and make it good

He assemble it to the engine, so I think this is in the hands of professionals and I install the unit in my monza and keep assembling everything, now the day is here and the car is finally on its own, idling and ready, but it does not move, well it can move forward in 1 and 2 , but that is it, now I have not got a hold of the guy yet, he has closed his business and work for a dealership I know , so I am thinking of showing up and ask him if I have done something wrong or what is missing.

I just hate to be very organizes and do all the right things in order to save time and money and then I always have to go back and do some of the things again

I do not know the th700R4 what could be wrong when 1 is best 2 is responding, as 3 has a fell to it, 4 is not there and reverse, was found and worked partly as almost full throttle, but is now gone, so after 2 minutes I only have responds on 3 forward gears

I hope this is telling somebody something, as I do not need this set back after all this carefully planing and work.

Thanks from Erik
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1974 Vega GT w auto - 1975 Monza 2+2 262 w 4 speed - 1978 Monza Spyder 305 w auto - 1976 Monza 2+2 262 w auto change to 305TPI w 4speed auto (my 4th H body)
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Re: th700r4 no go

Postby gt350fme » Mon Dec 21, 2015 9:22 pm

My 200R4 is similar, just some ideas
Is the TV cable hooked up and adjusted properly at the carb?
Shift linkage properly adjusted and a shifter that has enough shift locations for a 4 speed auto
Oil level correct
Really hopeing the torque converter was homed all the way in
I will post more ideas if they come to me
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Re: th700r4 no go

Postby Smiley » Tue Dec 22, 2015 1:53 am

Fluid level ?
The TV cable must be adjusted properly to avoid trans failure.
Later models were computer controlled, is the trans original to that 305 TPI ?
what year is the motor and the trans ?
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Re: th700r4 no go

Postby erik monza » Tue Dec 22, 2015 3:48 pm

Thanks guys

The transfluid level is good

The tv gable is pulled all the way at full throttle

The 305 TPI is same setup as camaro, this is why I use a th700r4, as the two of them has worked together as a factory standard

I got the th700r4 from a chevy astro van.

I gave it to a transmission shop and told them to check it completely and bolt it to my 255 hp 305TPI, as I was to lazy to pull it out of the car again, if it was not working right - - and what happens ??

So the shop knew the task and have no excuse not to do it right

Now they did not install the TV cable, I did and I checked the internet and I hope this is correct, that it should be pulled all the way at full throttle, I hope this is right??? as on the internet anybody can write anything, a lot of it is right, but not always all.

The shifter is from a Camaro that had a th700r4 transmission + cable from same, at each shifter location on the trans, I have checked that the cable has no tension at the gear shifter, so I think that the shifter and the transmission is in sink, but if I am one click of, it would still be in gear, just an other gear.

The trans have 3 wire, one for + for lock up in 4th, one for connecting to - for lock up in 3rd with a switch and one for -

In a brief minute I got it into reverse and pulled back 10 feet, but had to stop, after that I did not find reverse , even if I tried 9 or 10 times

When idling I could fell it got into forward, but I could not try it, as I had a fence in front of the car and no reverse.

I will jack up the car and try to synchronize or make sure the shifter is synchronized with the transmission, but this is not the kind of work I wanted to do.
Erik - - - Thanks everybody, I enjoy this community
1974 Vega GT w auto - 1975 Monza 2+2 262 w 4 speed - 1978 Monza Spyder 305 w auto - 1976 Monza 2+2 262 w auto change to 305TPI w 4speed auto (my 4th H body)
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Re: th700r4 no go

Postby Smiley » Wed Dec 23, 2015 3:38 am

I would contact the guy who rebuilt the trans and see if he will help you.

Are you using a tuned port intake ?
When you put the motor and trans together did the torque converter spin freely with a 1/4" gap before you bolted it to the flywheel ?
On the 700r4 the TV cable is not just a passing gear control like a TH350 trans.
Do you have a center to center distance of 1.094" to 1.125" from the throttle shaft to the TV pivot ?
Image

700r4 TV adjustment:
#1. The button that the cable hooks to at the carburetor or throttle body must have approximately 1.094" to 1.125" radius from the center of the throttle shaft to the center of the button the cable hooks to.

#2. Looking at the throttle shaft lever from the left side at idle position, approximately 33% of the throttle lever total travel must be to the rear of the throttle shaft centerline. And at wide-open throttle, approximately 67% to the front of the throttle shaft centerline. This will be about ½-inch to the rear and 1 inch to the front of the throttle shaft centerline.

#3. The throttle valve cable must be hooked up in this manner so the pressure will rise faster off idle and slow down at heavy throttle. If the pressure cable is pulled in a more even manner the pressure will be too low at light throttle.
WARNING: PERMANENT DAMAGE WILL OCCUR IF THE T.V. CABLE IS NOT ADJUSTED OR HOOKED UP.
THE DAMAGE WILL OCCUR WITHIN A FEW FEET OF DRIVING THE VEHICLE!
Failure to hook-up the throttle cable in this way will burn the three-four clutch pack up fast.
For this reason most trans shops will not sell a 700r4 rebuild unless they install it in the car and set the TV pressure
.

#4. The throttle valve cable controls transmission pressure. Adjusting this cable is the most important step when installing a 700R4, 4L60 or 200-4R transmission.

#5. The final step is to adjust the throttle valve cable. The cable must be adjusted so it is pulled fully out at wide-open throttle. To make sure disconnect the cable, hold the throttle wide open with your left hand, pull the cable fully out with your right hand and see if the cable end lines up with the button on the throttle lever. The cable should also be pulled out 3/8 to 1/2 of an inch at idle.

#6. Do not attempt to adjust the shift timing with the throttle valve cable. The shift timing is controlled by the governor springs and weights.
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Re: th700r4 no go

Postby tinsfci » Wed Dec 23, 2015 4:09 pm

This is just from memory long way back...but if the Th700r4 NOT is computer controlled, the TV cable is critical to get things right! As already been said, that cable controls "everything", not just pulled full when full throttle... see the pics posted on Tv cable bracket
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Re: th700r4 no go

Postby Monza Harry » Wed Dec 23, 2015 6:19 pm

Hey Eric Here's a link to TV cable set-up this is from a site for the 2004R but they are supposed to be the same as the 7004R Harry http://www.jakesperformance.com/TV_Cabl ... _Info.html
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Re: th700r4 no go

Postby erik monza » Fri Dec 25, 2015 2:55 pm

Thanks guys

I will check my set up with the drawing, my setup looks like the middle right drawing I have a Corvette TPI throttle body on a 305

I really hope I have not ruined my new renovated trans
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Erik - - - Thanks everybody, I enjoy this community
1974 Vega GT w auto - 1975 Monza 2+2 262 w 4 speed - 1978 Monza Spyder 305 w auto - 1976 Monza 2+2 262 w auto change to 305TPI w 4speed auto (my 4th H body)
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Re: th700r4 no go

Postby 75Monzta » Sat Feb 06, 2016 1:39 pm

Hello, it's been a long time since I have been on here. Check to make sure the filter didn't "fall" out of the pump. If an oring was used instead of the ribbed seal, it could be laying in the bottom of the pan and pump is sucking air. If installed in pump, make sure filter neck is not cracked and sucking air. If he "hammered" the filter into place, that could have happened. I have seen many of these situations and had to correct a "professional builders" mistakes. It happens but it needs to be verified before pan gets bolted into place and I hope it is something this simple for you. If he damaged the pump, it shouldn't even move in L1 or L2 as those are boosted pressure locations and pump wouldn't be able to supply the fluid needed to make it move which leads me back to the filter issue. Hope this helps.
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Re: th700r4 no go

Postby erik monza » Wed Feb 24, 2016 3:00 pm

Thanks Eric Ruybalid

I will look into that, this is going to be a big job, as my engine froze and is now leaking water from a place behind the right motor mount,

I hope it is the frost plug otherwise, I have to pull it all out again, after just getting everything finish and into the car after 3 years of work.

I hope I can fix the trans myself otherwise, I have to find a shop, that is easy, find one who can fix it and not charge like crazy is hard .
Erik - - - Thanks everybody, I enjoy this community
1974 Vega GT w auto - 1975 Monza 2+2 262 w 4 speed - 1978 Monza Spyder 305 w auto - 1976 Monza 2+2 262 w auto change to 305TPI w 4speed auto (my 4th H body)
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Re: th700r4 no go

Postby Len » Mon Feb 29, 2016 4:25 am

Hi Eric
Before pulling the eng
Pull the plugs turn the crank tell me what you see !
As far as the trans goes the tv cable needs 2 people to adjust 1 to hold the pedal down to the floor { this allows for pedal placement in the car and or floor mats ect. and 1 to adjust
And be sure that you are feeding the vacuum modulator ported vacuum ( ie at idle no vacuum of idle some wot full }
Somebody correct me if I am wrong if the modulator has full vacuum it will modulate trans pressure in the wrong direction creating problems in shift and direction of flow ?????
And yes this car has has the tuned port intake injection from the pics that Eric has posted . 80.s ta or firebird ect
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Re: th700r4 no go

Postby erik monza » Mon Feb 29, 2016 3:48 pm

Thanks so much Len

How are you my friend ? hope everything is fine in BC

Vacuum ?? now it is a long time since installing, I do not remember fitting a vacuum line from the TH700R4 to the intake?? where does that go ??

maybe this is the big mystery, please advice

after the engine froze, I took the belts of, as the pump would not turn and started the engine, after some idle, the water started to rum out, the left front frost plug has moved almost all the way out, it is not leaking, the leaking come from behind the right motor mount, Now I checked the oil, there is no water in the oil, yet any ways, I am trying to take of the right motor mount to see where the water comes from, I hope it come from that right side frost plug, as if the block is cracked, I have to start almost all over again, take it back to my engine builder to get all part into a redone block -- again.

Thanks from Erik
Erik - - - Thanks everybody, I enjoy this community
1974 Vega GT w auto - 1975 Monza 2+2 262 w 4 speed - 1978 Monza Spyder 305 w auto - 1976 Monza 2+2 262 w auto change to 305TPI w 4speed auto (my 4th H body)
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Re: th700r4 no go

Postby gt350fme » Mon Feb 29, 2016 11:38 pm

Unfortunately, unless l missed this to, the 200r4 and 700r4 do not use vacume like many other transmissions that do, so that's not your problem, sorry.
Is your torque converter lockup/unlock solenoid hooked up and working? Somehow though I don't think this would keep you of of gear.
One thing I have heard is if the tv cable/throttle cable interface is not perfect in adjustment the tranny will be damaged quickly, hope this is not the case.

PS, also the 4 speed shifter also should easily go through detents from 1st through park which are at opposite ends of the cable/lever throw on the tranny, And the cable pin there should easily alight and glide in and out of the pin hole at either end of 1st and park detents to be correct.
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Re: th700r4 no go

Postby erik monza » Sat Oct 15, 2016 4:23 pm

Problem solved

The guy I had to check the transmission - before I put it into the car - did nothing, other than change the oil and the pan seal

So I installed - shoehorned a 305 with a th700r4 into my monza without knowing that it was worthless and had to come out again.

Now i got a totally rebuilt one from Sweden, that I am putting into my monza.

I have to wait till I get the engine back, as it froze and cracked the block, yes a new engine with 15 minutes running time on the clock, yes and this time I get a 168 teeth plexplate on it, so I can use a starter with offset bolts if the new block has that - check - check.

This is getting to be a long project, with a lot of problems on the way.

I do not have the experience to do this perfect, and every second time I turn to a "pro" - they do not have the experience either ???? except for the bill.

Hi from Erik
Erik - - - Thanks everybody, I enjoy this community
1974 Vega GT w auto - 1975 Monza 2+2 262 w 4 speed - 1978 Monza Spyder 305 w auto - 1976 Monza 2+2 262 w auto change to 305TPI w 4speed auto (my 4th H body)
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Re: th700r4 no go

Postby erik monza » Tue Jun 06, 2017 12:11 pm

Ok here we go again.

New - new engine block is now mated to new - rebuilt transmission and into the car, everything is back together, just doing the last of the wiring, and taken the pan of the trans - this time to make sure that the gear selector handle is corresponding with the transmissions gears.

Yes then we are ready to start up again and this time it is my BIG hope that everything is OK

I will keep you posted on this long time built.

Thanks from Erik
Erik - - - Thanks everybody, I enjoy this community
1974 Vega GT w auto - 1975 Monza 2+2 262 w 4 speed - 1978 Monza Spyder 305 w auto - 1976 Monza 2+2 262 w auto change to 305TPI w 4speed auto (my 4th H body)
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