trans cable adjustments

Slyclone

Slyclone

Well-known member
Can anyone run me through the mill on the cable adjustments?

Is it a 2 person thing one person inside operating throttle and other pushing button watching for adjustment?

Just payed to have a trans installed and it feels very laggy, hits second gear super hard and does not give me the gearing I would like to see.

Guy claims he adjusted it "correctly". And said what I did was incorrect.

I pushed button in. Than pushed the thing that clicks and retracts back in.. And release button. Make the WOT motion and listen for clicks. Sound correct?

Looking for any help or advise. Thanks
 
Syclone#2960

Syclone#2960

What ever it takes!!
Re: trans cable adjustments

Adjust the trans cable to reset then floor the foot pedal. Your throttle cable might be stretched and not giving the WOT feel at the TB. I've stretched mine a few times. You need a scan tool or DM to confirm you are getting 100% at WOT.
 
Slyclone

Slyclone

Well-known member
Re: trans cable adjustments

When you say " reset " is that pushing the black piece that clicks/retracts back in after pushing the adjusting tab?

I usually make the adjustment under the hood and make the WOT motion with the throttle bracketry.
 
Syclone#2960

Syclone#2960

What ever it takes!!
Re: trans cable adjustments

Slyclone said:
When you say " reset " is that pushing the black piece that clicks/retracts back in after pushing the adjusting tab?

I usually make the adjustment under the hood and make the WOT motion with the throttle bracketry.
Click to expand...

Yes all the way back...at the gas peddle would be more accurate when your driving. Especially if your cable might be stretching or stretched...almost like a calibration if you think about it.:tup:
 
Slyclone

Slyclone

Well-known member
Re: trans cable adjustments

.truck feels slower when shifting doesn't pick up when you floor it I could have swore that the truck would downshift when you mash the gas
 
Slyclone

Slyclone

Well-known member
Re: trans cable adjustments

OK. I was right. Truck is supposed to downshift when pedal is depressed fully.

Was able to just snag my brother and have him make the adjustments with me. I wanted to have him mash the pedal to the floor while I watch the adjuster.

It eventually clicked out 2 clicks and the trans feels tight, shifts on point and down shifts when you hammer down. Feels really good. I'm pretty stoked because its feeling good.

I did watch the cable retract and it looked like it got hung up when my bro mashed the pedal. Not sure if the cable is stretched or the cable is obstructed? Probably going to have to look into whatever it is. I recall seeing a % on the tps data log but I might want to check a old log? Or try to run a new one instead of playing guessing games.
 
Slyclone

Slyclone

Well-known member
Re: trans cable adjustments

I probably need to source 2 new cables. One for the transmission and the throttle cable as well. Right now I'm not sure which one has the hang up.

Tomorrow I will pull data master out and see what that reads before I start taking things apart.
 
atomicmecha

atomicmecha

I hate rust
Re: trans cable adjustments

Does anyone still sell new throttle cables for our trucks? I know mine has stretched a good bit. Last data master log I did before taking my motor apart showed just over 90% on the tps. I thought about trying to re-clamp mine so its tight again but I'm worried about doing that without a backup cable.
 
Slyclone

Slyclone

Well-known member
Re: trans cable adjustments

Contact Jesse on forum, pearl91chevy?

He's parting a typhoon and I asked him about it. If you need you can ask him and get it. I'm not going to need. Was going to keep for a back up

I am not sure who sells them new but if we find out where a few new ones are would be great.
 
atomicmecha

atomicmecha

I hate rust
Re: trans cable adjustments

i found a post in the vault that said the original gm part was GM15622442 but after looking around online it doesn't seem to "fit". I know there's a lot of parts that fit our trucks but aren't listed to fit for various reasons. Not sure if this is one of those or not. Says its the same throttle cable on 87-91 s10 and s15's. Local junk yard sells them for $5. Going to grab one and test fit it and find out.
 
Jimmy

Jimmy

Banned
Re: trans cable adjustments

If you just want to set the TV cable,do this: With your left hand,push the button in and hold it,with your right hand just pull the cable to the right (drivers side.) Let go of the cable and the button. Twist the throttle linkage to WOT.The TV cable will ratchet "click click click" into it's desired position.

Also check to see that the throttle stop bracket isn't bent.The tab that hits the set screw.
 
Don W.

Don W.

Stab it and steer it
Re: trans cable adjustments

After a bit of searching:

[FONT=&quot]Here's the test:[/FONT]

  • [FONT=&quot]Take off from a stop at minimum throttle.[/FONT]
  • [FONT=&quot]Let the 1-2 occur.[/FONT]
  • [FONT=&quot]Immediately after the 1-2, Floor It.[/FONT]
[FONT=&quot]The trans MUST downshift back into First.[/FONT]

  • [FONT=&quot]If it does, your TV set-up is fine. (In that the pressures are adequate to not burn-up the trans).[/FONT]
The governor controls shifting points relative to actual driving speed. The governor works in conjunction with the TV valve do determine the best gear for a given acceleration and driving speed. The governor weights move out linearly away from the governor as speed increases. This causes more pressure to be seen at the shift valves. Once the pressure is great enough to override the opposing spring pressure behind the next shift valve, a shift occurs. At low speeds, a low amount of pressure will suffice to 'hold' the gear. This also results in smoother shifts. At higher speeds, however, more pressure is required to hold the gear properly - and again, this is achieved by increased pressure with increased speed. Similarly, the throttle valve (TV) can override the governor's gear choice. Suppose at a given speed the governor should be in 3rd gear. If the peddle is pressed down enough(thus, pulling the TV cable) the TV will allow opposing pressure against the shift valve to either maintain the current gear or even downshift as appropriate into a lower gear.


Also do a web search for this and you'll be buried in instructions... :) and how the whole things works.

[FONT=&quot]700r4 tv cable adjustment

[FONT=&quot]:2cents:I find the "correct" adjustment gives much to sev[FONT=&quot]ere a shift. I use the the above plus how it shifts at WOT.[/FONT][/FONT]
[/FONT]

[FONT=&quot]
[/FONT]
 
Don W.

Don W.

Stab it and steer it
Re: trans cable adjustments

Well first I apologize for the omitted credit. No desire to upset the apple cart. Found my search, apparently posted by ty0331

It's been so long since I actually adjusted my TV cable I don't remember the exact procedure I used. Probably a combination of the recommended then moving the cable in one click at a time until the shift points came in correct. I must have done something right because there are literally hundreds of 1/4 mile passes on that trans with -0- issues, Shifts the same pass after pass.

All I can really say is that on my truck the recommended procedure gives much to firm and late of a shift for normal street driving.
 
Slyclone

Slyclone

Well-known member
Re: trans cable adjustments

DaveP said:
Not to mention the OP has since blown the engine up since he started this thread 5 weeks ago. TV adjustment is pretty far down the list now, me-thinks.
Click to expand...

Dave is right. My truck has failed me. I'm not sure if I'm going to keep or sell. I attempted to rip apart and was detered away by frozen down pipe bolts into the turbo.
 
Quickstop [UK]

Quickstop [UK]

Combating adversyty.
Re: trans cable adjustments

Dr. Mark doesn't go to work after half a bottle of red wine. ;)

Sorry your truck is giving you such a hard time man. Sounds very frustrating indeed.
 
Slyclone

Slyclone

Well-known member
Re: trans cable adjustments

I started the rip down. Couple things held me up but I just put at least 2 hours in disassemble stuff. Down pipe is free, clear enough to work my hand or a tool in between and remove the whole manifold and turbo attached. Down pipe Should just sweep right down to fender well and let me slide the.turbo/manifold out as one ( with oil drain attached).. Finished removing the 2 crossover bolts down low. Where I about stopped.

Will attempt to remove the front ac bracket to free up some more room. Rip down the top intake and set it up to TDC so I don't have no b/s games before I forget to do that.

Getting the 3 down pipe bolts made me feel like going a little bit more forward with this. I used my 1/2 drive snap on shit and there wasn't any problems with cranking the frozen hardware out by hand.

Well see what happens.

*To add* I did end up getting the transmission cable adjusted to my liking. The truck performed very well after a new transmission unit was installed and was super responsive after making the correct adjustment. Unfortunately, the fun was short lived and I am doing what I can to now fix it.
 
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